Acousto-optic Patents (Class 359/305)
  • Patent number: 10418775
    Abstract: The invention relates to an external cavity tunable laser with dual beam outputs. The first laser cavity of the tunable laser comprises a first laser cavity mirror, a laser gain medium, an intracavity collimating lens, an active optical phase modulator, a tunable acousto-optic filter, a tunable Fabry-Perot tunable filter, a second reflection mirror all disposed inside a laser cavity sequentially, and a laser driver and control system. The laser cavity beam reflected by the first laser cavity mirror enters the tunable acousto-optic filter to generate a zeroth order diffracted beam as the first laser output beam. The laser cavity beam reflected by the second laser cavity mirror enters the tunable acousto-optic filter to generate a zeroth order diffracted beam as the second laser output beam. The tunable laser further comprises a wavelength locker outside the laser cavity.
    Type: Grant
    Filed: January 7, 2016
    Date of Patent: September 17, 2019
    Assignee: GP PHOTONICS, INC.
    Inventor: Peiliang Gao
  • Patent number: 10401704
    Abstract: A wavefront of a light beam that exits an acousto-optic material is estimated; a control signal for an acousto-optic system that includes the acousto-optic material is generated, the control signal being based on the estimated wavefront of the light beam; and the control signal is applied to the acousto-optic system to generate a frequency-chirped acoustic wave that propagates in the acousto-optic material, the frequency-chirped acoustic wave forming a transient diffractive element in the acousto-optic material, an interaction between the transient diffractive element and the light beam adjusting the wavefront of the light beam to compensate for a distortion of the wavefront of the light beam, the distortion of the wavefront being at least partially caused by a physical effect in the acousto-optic material.
    Type: Grant
    Filed: November 11, 2016
    Date of Patent: September 3, 2019
    Assignee: ASML Netherlands B.V.
    Inventor: Robert Jay Rafac
  • Patent number: 10386696
    Abstract: The invention relates to an illumination apparatus (100), in particular for a motor vehicle, comprising at least one laser light source (10) for producing excitation light, at least one wavelength conversion element (20), which is designed to receive excitation light from the at least one laser light source (10) in the form of an excitation-light light bundle, at least one optical imaging element (30a, 30b, 30c; 31; 32), which images light, which is emitted in the visible wavelength range by the wavelength conversion element (20), in the form of at least one light distribution or one partial light distribution (LVa, LVb, LVc, LVd, LVe), and at least one beam-deflecting device in the beam path between the at least one laser light source (10) and the at least one wavelength conversion element (20).
    Type: Grant
    Filed: February 24, 2016
    Date of Patent: August 20, 2019
    Assignee: ZKW GROUP GMBH
    Inventors: Markus Reinprecht, Michael Riesenhuber
  • Patent number: 10288701
    Abstract: Provided is an optically pumped atomic magnetometer that can separate and acquire magnetic information of spatially different places at the same time by one probe beam. The optically pumped atomic magnetometer includes a cell containing alkali metal atoms, a pump beam optical system introducing pump beams including circularly polarized light component to different locations of the cell, a probe beam optical system introducing a probe beam including linearly polarized light component to the cell, a detection unit detecting a signal reflecting a rotation angle of a plane of polarization of the probe beam after intersecting with the pump beams, and an information acquisition unit acquiring information related to a magnetic field intensity of each of the different locations from the detected signal. The pump beam optical system includes a modulation unit modulating the pump beams so that one of frequencies and phases of the pump beams is different.
    Type: Grant
    Filed: August 10, 2015
    Date of Patent: May 14, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Tetsuo Kobayashi, Yosuke Ito, Sunao Ichihara, Natsuhiko Mizutani
  • Patent number: 10288546
    Abstract: In one aspect, the present teachings provide a system for performing cytometry that can be operated in three operational modes. In one operational mode, a fluorescence image of a sample is obtained by exciting one or more fluorophore(s) present in the sample by an excitation beam formed as a superposition of a top-hat-shaped beam with a plurality of beams that are radiofrequency shifted relative to one another. In another operational mode, a sample can be illuminated successively over a time interval by a laser beam at a plurality of excitation frequencies in a scanning fashion. The fluorescence emission from the sample can be detected and analyzed, e.g., to generate a fluorescence image of the sample. In yet another operational mode, the system can be operated to illuminate a plurality of locations of a sample concurrently by a single excitation frequency, which can be generated, e.g., by shifting the central frequency of a laser beam by a radiofrequency.
    Type: Grant
    Filed: August 8, 2018
    Date of Patent: May 14, 2019
    Assignee: OMEGA BIOSYSTEMS INCORPORATED
    Inventors: Eric D. Diebold, Keegan Owsley, Jonathan Lin
  • Patent number: 10181838
    Abstract: An elastic wave apparatus includes a piezoelectric substrate including a main surface and a polarization axis direction having a tilt angle with respect to the main surface, an IDT electrode provided on the main surface, and at least one line on the main surface and between an end edge of the main surface and the IDT electrode. A relationship a?316|cos(?)|?m is satisfied where a denotes a distance from the end edge of the main surface to the IDT electrode and b?28 ?m where a dimension of the line along a direction connecting the end edge to the IDT electrode is defined as a width, b denotes the width of the line when one line is provided, and b denotes the sum of the widths of multiple lines when the multiple lines are provided.
    Type: Grant
    Filed: May 25, 2017
    Date of Patent: January 15, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Daisuke Ajima
  • Patent number: 10148251
    Abstract: An elastic wave apparatus includes a piezoelectric substrate including a main surface and a polarization axis direction having a tilt angle with respect to the main surface, an IDT electrode provided on the main surface, and at least one line on the main surface and between an end edge of the main surface and the IDT electrode. A relationship a?316|cos(?)|?m is satisfied where a denotes a distance from the end edge of the main surface to the IDT electrode and b?28 ?m where a dimension of the line along a direction connecting the end edge to the IDT electrode is defined as a width, b denotes the width of the line when one line is provided, and b denotes the sum of the widths of multiple lines when the multiple lines are provided.
    Type: Grant
    Filed: May 25, 2017
    Date of Patent: December 4, 2018
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Daisuke Ajima
  • Patent number: 9971568
    Abstract: An optical system uses a birefringent medium disposed within an optical cavity, receives an input beam that may be non-coherent or coherent, and produces a randomization energy from the input beam, by creating birefringent induced beam subdivisions each cavity traversal, where after a threshold number of beam traversals have occurred, a randomized energy distribution is created. That randomized energy distribution is read by a photodetector and converted into a random number by a randomization processing device.
    Type: Grant
    Filed: March 3, 2016
    Date of Patent: May 15, 2018
    Inventor: Carol Y. Scarlett
  • Patent number: 9891499
    Abstract: According to one embodiment, an acousto-optic modulator includes an acousto-optic medium and a piezoelectric transducer. The acousto-optic medium has a configuration of a hexahedron. The acousto-optic medium has surfaces D, E, F, G and H. The piezoelectric transducer is provided on a surface C of the acousto-optic medium. The surface D opposes the surface C and has respective four sides shared by the surfaces E, F, G and H. Four angles defined between the surface D and the surfaces E, F G and H each is other than 90°. At least one of eight angles defined between each pair of the surfaces C, E, F, G and H is other than 90°. The each pair has one shared side.
    Type: Grant
    Filed: August 1, 2016
    Date of Patent: February 13, 2018
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Satoshi Nakamura, Hayato Goto, Mamiko Kujiraoka, Kouichi Ichimura
  • Patent number: 9857583
    Abstract: Aspects herein describe an optical delay controller which introduces a desired delay into an optical signal. To do so, the optical delay controller includes multiple reflective surfaces (e.g., mirrors) that establish a closed loop on which an input signal propagates. The optical delay controller includes an output interface that outputs a delayed version of the input optical signal where the delay corresponds to the circumference of the closed loop. For example, the optical delay loop may use a Brewster window as the output interface which permits the optical signal propagating in the closed loop to exit the loop. Moreover, the optical delay loop may include one or more actuators that move the reflective surfaces forming the closed loop relative to each other. Changing the distance between two mirrors changes the delay introduced by the optical delay loop.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: January 2, 2018
    Assignee: THE BOEING COMPANY
    Inventors: Morteza Safai, Gary E. Georgeson
  • Patent number: 9810391
    Abstract: A bending light device for a vehicle diffracting light emitted from a light source and deflecting the light at a desired angle and in a desired direction may include an ultrasonic light deflector configured to diffract light incident thereon in a selected direction by emitting an ultrasonic beam to the incident light, a light reflection unit configured to reflect light emitted from a light source to the ultrasonic light deflector, a projection lens configured to project light incident thereon after passing through the ultrasonic light deflector to radiate the light outside, and a converging lens arranged between the ultrasonic light deflector and the projection lens and configured to converge the light having passed through the ultrasonic light deflector on the projection lens.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: November 7, 2017
    Assignee: Hyundai Motor Company
    Inventor: Kwang Min Ko
  • Patent number: 9724782
    Abstract: Laser systems and methods insert a settling time before and after each tooling action. A peak AOD excursion generally occurs at the transition in velocity between inter-feature moves and tooling moves. This transition occurs both before tooling (on the approach to the tooling location) and after tooling (on the departure from the completed tooling location to the next location). By adding a settling delay on each end of the tooling period, the AOD excursion is allowed to settle to a lower value. This then allows higher inter-tooling velocities (for high throughput) while keeping the AOD travel excursion within the bounds of the system's AOD configuration.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: August 8, 2017
    Assignee: Electro Scientific Industries, Inc.
    Inventor: Mark A. Unrath
  • Patent number: 9645116
    Abstract: An object characteristics measurement apparatus of the invention includes a surface acoustic wave device. The surface acoustic wave device includes: an interdigitated electrode that is formed on a first surface on a piezoelectric substrate, excites an elastic wave, and receives reflection based on the elastic wave; a reflector that has a third surface and a fourth surface between the interdigitated electrode and a second surface orthogonal to the first surface in a propagation direction of the elastic wave; a reaction field that is formed between the interdigitated electrode and the reflector, in which the measured object is to be loaded; and a propagator that is formed between the reflector and the second surface.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: May 9, 2017
    Assignee: JAPAN RADIO CO., LTD.
    Inventors: Naoyuki Yoshimura, Hiromi Yatsuda
  • Patent number: 9448100
    Abstract: Provided is a signal processing apparatus including: a transducer that performs scanning through the interior of an object and acquires received waveform data of a plurality of scanlines; an intensity screening unit that outputs a high intensity position at which signal intensity calculated from the received waveform data is higher than a first predetermined value; a correlation calculation unit that calculates a correlation value in a constant-width division for received waveform data of a first scanline and of a second scanline having a predetermined correlation with the first scanline; a position extraction unit that extracts, as a candidate position of a singular region, a position which corresponds to a high intensity position and for which the correlation value is lower than a second predetermined value; and an image processor that performs signal processing of generating image data of the object on the basis of the received waveform data.
    Type: Grant
    Filed: February 1, 2012
    Date of Patent: September 20, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kenichi Nagae, Hirofumi Taki, Toru Sato
  • Patent number: 9400404
    Abstract: An acousto-optical filter element (114) is provided which has an acousto-optical crystal (118) having an acoustic signal transmitter (120) for generating acoustic signals in the acousto-optical crystal (118). The acousto-optical crystal (118) is designed to selectively spatially deflect light of a target wavelength from an input light beam (116) entering into the acousto-optical crystal (118), as a function of a high frequency applied to the acoustic signal transmitter (120), and to thereby produce a target light beam (126) having the target wavelength. In addition, the acousto-optical filter element (114) includes a spatial filter element (132) which is located in the target light beam (126) and is designed to selectively suppress the intensity of the target light beam (126) in a plane perpendicular to the propagation direction of the target light beam (126).
    Type: Grant
    Filed: April 10, 2014
    Date of Patent: July 26, 2016
    Assignee: LEICA MICROSYSTEMS CMS GMBH
    Inventors: Hilmar Gugel, Volker Seyfried
  • Patent number: 9299733
    Abstract: An image sensor is formed by a pixel array including a plurality of pixels. Certain ones of the pixels include, above their active areas, a first optical grating formed of periodically spaced apart parallel strips separated from the active area by a first insulator. Those pixels further include, in another metal level, a second optical grating formed of periodically spaced apart parallel strips separated from the first grating by a second insulator. The second optical grating is laterally shifted with respect to the first grating in a direction orthogonal to a longitudinal direction of the parallel strips.
    Type: Grant
    Filed: March 17, 2015
    Date of Patent: March 29, 2016
    Assignee: STMicroelectronics (Grenoble 2) SAS
    Inventor: Flavien Hirigoyen
  • Patent number: 9130130
    Abstract: A light emitting device containing a semiconductor light emitting component and a phosphor, the phosphor is capable of absorbing a part of light emitted by the light emitting component and emitting light of a wavelength different from that of the absorbed light, is provided. A straight line connecting a point of chromaticity corresponding to a spectrum generated by the light emitting component and a point of chromaticity corresponding to a spectrum generated by the phosphor is substantially along a black body radiation locus in a chromaticity diagram.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: September 8, 2015
    Assignee: NICHIA CORPORATION
    Inventors: Yoshinori Shimizu, Kensho Sakano, Yasunobu Noguchi, Toshio Moriguchi
  • Patent number: 9104087
    Abstract: Methods, systems and apparatus for manipulating electromagnetic radiation such as laser beams. A method and apparatus for correcting magnification chromatic aberration utilizes one or more dispersive lenses such that long wavelength components are magnified less than short wavelength components. A telecentric relay is preferred to achieve this aim. Further, the use of polarizers to block the undesired zeroth order components of diffraction emanating from acousto-optic deflectors (AODs) is disclosed. Furthermore, specific designs of AOD including narrow transducer AODs which produce a diverging acoustic wave and AODs having two transducers and a selection switch are disclosed.
    Type: Grant
    Filed: February 10, 2014
    Date of Patent: August 11, 2015
    Assignee: UCL Business PLC
    Inventors: Paul Anthony Kirkby, K. M. naga Srinivas Nadella, Robin Angus Silver
  • Patent number: 9074936
    Abstract: Methods and apparatus are disclosed, and include: (a) separating an input electromagnetic waveform into a plurality of intermediate waveforms, each of the intermediate waveforms being spatially separated from one another; (b) dispersing frequency components of each intermediate waveform onto different regions of a spatial light modulator and modulating at least some of the dispersed frequency components with the spatial light modulator; and (c) recombining the dispersed frequency components for each of the intermediate waveforms to produce a plurality of temporally shaped output waveforms.
    Type: Grant
    Filed: June 27, 2008
    Date of Patent: July 7, 2015
    Assignee: Massachusetts Institute of Technology
    Inventors: Keith A. Nelson, Kenan Gundogdu, Katherine W. Stone, Daniel B. Turner
  • Patent number: 9069228
    Abstract: An acousto-optic device having a wide range of diffraction angle and an optical scanner, a light modulator, and a display apparatus using the acousto-optic device are provided. The acousto-optic device includes a core layer having a periodic photonic crystal structure in which unit cells of predetermined patterns are repeated, a first clad layer on a first surface of the core layer, the first clad layer having a refractive index that is different from a refractive index of the core layer, a second clad layer on a second surface of the core layer, the second surface being opposite the first surface, the second clad layer having a refractive index that is different from the refractive index of the core layer, and a sound wave generator configured to apply surface acoustic waves (SAW) to the core layer, the first clad layer, the second clad layer, or any combination thereof.
    Type: Grant
    Filed: August 14, 2012
    Date of Patent: June 30, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seung-hoon Han, Wan-joo Maeng
  • Patent number: 8997572
    Abstract: A probe for use with an imaging system, including a scanning device configured to receive a first light beam from a light source, a beam-divider configured to split the first light beam into a plurality of second light beams, and a focusing device configured to focus each of the second light beams on respective locations in an object of interest.
    Type: Grant
    Filed: February 9, 2012
    Date of Patent: April 7, 2015
    Assignee: Washington University
    Inventors: Lihong Wang, Liang Song, Konstantin Maslov, Bin Rao
  • Patent number: 8917442
    Abstract: The present disclosure provides various systems and methods for focusing electromagnetic radiation (EMR) within a diffusion medium, such as a turbid medium. A diffusion medium is irradiated with EMR. The EMR may be modulated by an acoustical wave focused on a focus volume within the diffusion medium. The EMR may be modulated by a beat frequency or other function of multiple focused acoustical waves. The EMR may be modulated at a harmonic of a fundamental frequency of one or more acoustical waves. A filter may filter the emerging EMR to remove all but specifically modulated EMR scattered from the focus volume. The modulated EMR may be focused and/or used for various purposes, including imaging. In some embodiments, the modulated EMR may be reflected and/or amplified by a phase conjugating mirror. Furthermore, in some embodiments, acoustical phase conjugation may be used to focus an acoustical wave on a focus volume.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: December 23, 2014
    Assignee: Elwha LLC
    Inventors: Michael H. Baym, Roderick A. Hyde, Jordin T. Kare, Lowell L. Wood, Jr.
  • Patent number: 8908725
    Abstract: The invention relates to an external cavity tunable laser. The laser comprises an extracavity collimating lens arranged outside a laser cavity, and a laser output mirror, a laser gain medium, an intracavity collimating lens, an active optical phase modulator and a tunable optical filter all arranged sequentially inside the laser cavity. The laser further comprises an active polarization rotator arranged behind the tunable optical filter, a polarization beam splitter arranged behind the active polarization rotator, a first etalon and a first total reflection mirror arranged in the direction vertical to the optic axis of a laser cavity output lens, a second etalon and a second total reflection mirror arranged in the direction of the optic axis of the laser cavity output lens, and a laser drive and control circuit.
    Type: Grant
    Filed: August 23, 2013
    Date of Patent: December 9, 2014
    Inventor: Peiliang Gao
  • Patent number: 8896909
    Abstract: The technology disclosed relates to improved acousto-optic deflectors (AODs). In particular, it relates to compensation for subtle effects not previously addressed by AOD designers. A shifting center of gravity is described and addressed using advanced power equalisation strategies. Denser writing brushes are provided by using a two-dimensional array of beams with corrections for factors such as angle of incidence at the AOD interface. The compensation and dense brush features can be used separately or in combination.
    Type: Grant
    Filed: November 3, 2011
    Date of Patent: November 25, 2014
    Assignee: Micronic AB
    Inventors: Torbjörn Sandström, Hans Martinsson
  • Patent number: 8891157
    Abstract: The technology described applies an extended frequency range of over one octave to drive an acousto-optic deflector, thereby defying a design rule of thumb that limited bandwidth to just under one octave. A combination of extended frequency range and well-timed beam blanking reduces the proportion of a so-called chirp signal that is consumed by beam blanking. This increases the working, effective portion of the sweep signal.
    Type: Grant
    Filed: August 29, 2011
    Date of Patent: November 18, 2014
    Assignee: Micronic AB
    Inventor: Torbjorn Sandstrom
  • Patent number: 8873131
    Abstract: An acousto-optic device includes an acousto-optic medium having a multi-layer nanostructure; and a sonic wave generator configured to apply sonic waves to the acousto-optic medium having the multi-layer nanostructure. The acousto-optic medium having the multi-layer nanostructure includes a second layer formed of at least two materials that have different dielectric constants and alternate with each other; and a first layer disposed on a first surface of the second layer and formed of a first material, and/or a third layer disposed on a second surface of the second layer and formed of a fourth material.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: October 28, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seung-hoon Han, Wan-joo Maeng, Sang-yoon Lee, Hong-seok Lee
  • Publication number: 20140313569
    Abstract: An illumination device for illuminating a target to be combated includes a laser light source for emitting light along a beam path, a first modulator in the beam path and configured to manipulate a direction of the beam path in a first plane, a phase plate in the beam path having a variety of different optical thicknesses, and a control device connected to the light source and the first modulator and is configured to activate the first modulator using different frequencies, so that the beam path is deflected over a control period of time up to a first angle.
    Type: Application
    Filed: April 18, 2014
    Publication date: October 23, 2014
    Applicant: MBDA Deutschland GmbH
    Inventor: Rudolf PROTZ
  • Patent number: 8848277
    Abstract: A method and apparatus for protecting the seed laser in a laser produced plasma (LPP) extreme ultraviolet (EUV) light system are disclosed in one embodiment, a Bragg AOM is used as a switch on the beam path from the seed laser to other optical components and ultimately to an irradiation site. Power is applied to the Bragg AOM and pulses from the seed laser are thus deflected onto the desired beam path rather than passing straight through the Bragg AOM. Once the pulses have passed through the Bragg AOM, power to the Bragg AOM ceases, so that any reflections from the irradiation site will pass straight through the Bragg AOM and will not be deflected back to the seed laser. Use of the Bragg AOM rather than components previously used results in lower power consumption and better protection for the seed laser.
    Type: Grant
    Filed: January 9, 2013
    Date of Patent: September 30, 2014
    Assignee: ASML Netherlands B.V.
    Inventors: Richard L. Sandstrom, Jonathan D. Grava
  • Patent number: 8831050
    Abstract: A tunable laser, including: a laser resonant cavity; a laser gain medium; an intra-cavity collimating lens; an acousto-optic tunable filter; a device exciting sound waves in an acousto-optic crystal; a radio frequency signal source providing radio frequency energy for the energy transducer and adjusting the oscillation wavelength of the laser resonant cavity by changing radio signal frequency; an optical phase modulator disposed between the intra-cavity collimating lens and the acousto-optic crystal; an optical etalon disposed between the optical phase modulator and the laser gain medium; a wavelength locker disposed at one of zero-order diffraction optical paths of intra-cavity light; a pigtailed collimator coupling laser output light to an optical fiber; a pumping source exciting the laser gain medium; a phase modulator driver for driving the optical phase modulator; and a signal control processing circuit.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: September 9, 2014
    Assignee: GP Photonics, Inc.
    Inventor: Peiliang Gao
  • Publication number: 20140240812
    Abstract: Provided is an acousto-optic device including an elastic medium; a meta structure formed on a first surface of the elastic medium, and an elastic-wave generating unit which generates an elastic wave in the elastic medium. The meta structure includes a first layer and a second layer that is formed on the first layer. The at least one of the first layer and the second layer includes a predetermined repetitive pattern.
    Type: Application
    Filed: January 23, 2014
    Publication date: August 28, 2014
    Applicants: AJOU UNIVERSITY INDUSTRY COOPERATION FOUNDATION, SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Seung-hoon HAN, Wan-joo MAENG, Won-taek SEO, Hoon SONG, Hae-kwan OH, Kee-keun LEE
  • Patent number: 8810886
    Abstract: A display system includes a coherent light source that can emit a coherent light beam, a de-speckling device configured to distort a wavefront of the coherent light beam to produce a distorted coherent light beam, and a two-dimensional array of light modulators that can selectively modulate the distorted coherent light beam to select a plurality of pixels for display.
    Type: Grant
    Filed: February 7, 2012
    Date of Patent: August 19, 2014
    Assignee: Spatial Photonics, Inc.
    Inventors: Vlad Novotny, Gabriel Matus, Michel Combes
  • Publication number: 20140204454
    Abstract: A first acousto-optic deflector receives a laser beam. The first acousto-optic deflector diffracts the received laser beam along a first axis. A second acousto-optic deflector receives the diffracted laser beam. The second acousto-optic deflector diffracts the received diffracted laser beam along a second axis.
    Type: Application
    Filed: December 22, 2011
    Publication date: July 24, 2014
    Inventors: Yonggang Li, Islam A. Salama, Chong Zhang
  • Publication number: 20140168753
    Abstract: An apparatus for controlling an acousto-optical component influencing at least one of illumination light and detection light in a microscope is described. The apparatus comprises a radio-frequency generator for supplying the acousto-optical component with a radio frequency. The radio-frequency generator is configured to compensate deviations in the characteristics of the light due to temperature fluctuations in the acousto-optical component by adapting the radio frequency.
    Type: Application
    Filed: February 20, 2014
    Publication date: June 19, 2014
    Applicant: Leica Microsystems CMS GmbH
    Inventor: Volker Seyfried
  • Publication number: 20140168752
    Abstract: A tunable acoustic gradient index of refraction (TAG) lens and system are provided that permit, in one aspect, dynamic selection of the lens output, including dynamic focusing and imaging. The system may include a TAG lens and at least one of a source and a detector of electromagnetic radiation. A controller may be provided in electrical communication with the lens and at least one of the source and detector and may be configured to provide a driving signal to control the index of refraction and to provide a synchronizing signal to time at least one of the source and the detector relative to the driving signal. Thus, the controller is able to specify that the source irradiates the lens (or detector detects the lens output) when a desired refractive index distribution is present within the lens, e.g. when a desired lens output is present.
    Type: Application
    Filed: December 3, 2013
    Publication date: June 19, 2014
    Applicant: TAG Optics Inc.
    Inventors: Craig B. Arnold, Euan McLeod, Alexandre Mermillod-Blondin
  • Patent number: 8724209
    Abstract: An acousto-optic (AO) device includes an AO interaction crystal for receiving and propagating a light ray along an optical propagation direction (OPD). A piezoelectric transducer is on at least one surface of the AO interaction crystal for receiving an electrical signal and emitting an acoustic wave into the AO interaction crystal. An electrode is on the piezoelectric transducer for coupling the electrical signal to the piezoelectric transducer. The electrode is a patterned electrode that includes a plurality of different transverse edge positions. The plurality of different transverse edge positions span a position range of at least five percent of an average height (Havg) of the electrode.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: May 13, 2014
    Assignee: Gooch and Housego PLC
    Inventor: Christopher N. Pannell
  • Patent number: 8718414
    Abstract: An acousto-optical filter element (114) is provided which has an acousto-optical crystal (118) having an acoustic signal transmitter (120) for generating acoustic signals in the acousto-optical crystal (118). The acousto-optical crystal (118) is designed to selectively spatially deflect light of a target wavelength from an input light beam (116) entering into the acousto-optical crystal (118), as a function of a high frequency applied to the acoustic signal transmitter (120), and to thereby produce a target light beam (126) having the target wavelength. In addition, the acousto-optical filter element (114) includes a spatial filter element (132) which is located in the target light beam (126) and is designed to selectively suppress the intensity of the target light beam (126) in a plane perpendicular to the propagation direction of the target light beam (126).
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: May 6, 2014
    Assignee: Leica Microsystems CMS GmbH
    Inventors: Hilmar Gugel, Volker Seyfried
  • Patent number: 8687267
    Abstract: An acousto-optical tunable filter is disclosed. The filter includes a medium having one or more indices of refractions alterable by the application of acoustic waves to the medium. The filter also includes an acoustic transducer coupled to the medium to generate the acoustic waves Altering the frequency of the acoustic wave selects among the different wavelengths in the incident light ray. The device also includes an optical mirror for reflecting a wave diffracted by the medium back to the medium so that it can again be diffracted. The first diffracted wave has its frequency shifted in one direction by the frequency of the acoustic wave while the second diffracted wave has its frequency shifted in the opposite direction, thereby compensating for the first shift. The result is an output ray with little or no frequency shift.
    Type: Grant
    Filed: February 24, 2009
    Date of Patent: April 1, 2014
    Inventor: Peiliang Gao
  • Patent number: 8681412
    Abstract: An acousto-optical system is described comprising at least one acousto-optical element having at least one transducer that is attached to a crystal, a driver unit for generating at least one acoustic signal for driving acousto-optical elements modifying light transmitted through the acousto-optical element and comprising at least one digital data processing unit, at least one digital-to-analog converter transforming the digital combination signal into an initial analog driver signal, and an amplifier for amplifying the initial analog driver signal to become said analog electronic driver signal. Further, a microscope and a method of operating the acousto-optical element is are described. Various objectives are achieved like more flexibility, real time compensation for non-linearity and reducing the number, size, costs and energy consumption of electronic components.
    Type: Grant
    Filed: June 1, 2011
    Date of Patent: March 25, 2014
    Assignee: Leica Microsystems CMS GmbH
    Inventors: Bernd Widzgowski, Holger Birk, Volker Seyfried
  • Publication number: 20140081096
    Abstract: The present disclosure provides various systems and methods for focusing electromagnetic radiation (EMR) within a diffusion medium, such as a turbid medium. A diffusion medium is irradiated with EMR. The EMR may be modulated by an acoustical wave focused on a focus volume within the diffusion medium. The EMR may be modulated by a beat frequency or other function of multiple focused acoustical waves. The EMR may be modulated at a harmonic of a fundamental frequency of one or more acoustical waves. A filter may filter the emerging EMR to remove all but specifically modulated EMR scattered from the focus volume. The modulated EMR may be focused and/or used for various purposes, including imaging. In some embodiments, the modulated EMR may be reflected and/or amplified by a phase conjugating mirror. Furthermore, in some embodiments, acoustical phase conjugation may be used to focus an acoustical wave on a focus volume.
    Type: Application
    Filed: September 20, 2012
    Publication date: March 20, 2014
    Applicant: ELWHA LLC
    Inventors: Michael H. Baym, Roderick A. Hyde, Jordin T. Kare, Lowell L. Wood, JR.
  • Publication number: 20140078578
    Abstract: The present disclosure provides various systems and methods for focusing electromagnetic radiation (EMR) within a diffusion medium, such as a turbid medium. A diffusion medium is irradiated with EMR. The EMR may be modulated by an acoustical wave focused on a focus volume within the diffusion medium. The EMR may be modulated by a beat frequency or other function of multiple focused acoustical waves. The EMR may be modulated at a harmonic of a fundamental frequency of one or more acoustical waves. A filter may filter the emerging EMR to remove all but specifically modulated EMR scattered from the focus volume. The modulated EMR may be focused and/or used for various purposes, including imaging. In some embodiments, the modulated EMR may be reflected and/or amplified by a phase conjugating mirror. Furthermore, in some embodiments, acoustical phase conjugation may be used to focus an acoustical wave on a focus volume.
    Type: Application
    Filed: September 20, 2012
    Publication date: March 20, 2014
    Applicant: ELWHA LLC
    Inventors: Michael H. Baym, Roderick A. Hyde, Jordin T. Kare, Lowell L. Wood, Jr.
  • Patent number: 8659819
    Abstract: An apparatus for controlling an acousto-optical component influencing at least one of illumination light and detection light in a microscope is described. The apparatus comprises a radio-frequency generator for supplying the acousto-optical component with a radio frequency. The radio-frequency generator is configured to compensate deviations in the characteristics of the light due to temperature fluctuations in the acousto-optical component by adapting the radio frequency.
    Type: Grant
    Filed: November 6, 2008
    Date of Patent: February 25, 2014
    Assignee: Leica Microsystems CMS GmbH
    Inventor: Volker Seyfried
  • Publication number: 20140036346
    Abstract: A tunable acoustic gradient index of refraction (TAG) lens and system are provided that permit, in one aspect, dynamic selection of the lens output, including dynamic focusing and imaging. The system may include a TAG lens and at least one of a source and a detector of electromagnetic radiation. A controller may be provided in electrical communication with the lens and at least one of the source and detector and may be configured to provide a driving signal to control the index of refraction and to provide a synchronizing signal to time at least one of the source and the detector relative to the driving signal. Thus, the controller is able to specify that the source irradiates the lens (or detector detects the lens output) when a desired refractive index distribution is present within the lens, e.g.
    Type: Application
    Filed: September 27, 2013
    Publication date: February 6, 2014
    Inventors: Craig B. Arnold, Euan McLeod, Alexandre Mermillod-Blondin
  • Publication number: 20130321898
    Abstract: A direct imaging system comprises an illumination unit comprising a plurality of light sources, the plurality of light sources configured to emit a plurality of beams, an optical system for forming the plurality of beams to be aligned in position or angle, an acoustic optical modulator positioned to receive the plurality of beams aligned in one of position or angle and to consecutively diffract different portions of the plurality of beams as an acoustic wave propagates in an acoustic direction, and a scanning element adapted to scan an exposure plane with the plurality of beams modulated by the acoustic optical modulator at a scanning velocity, wherein the scanning velocity is selected to incoherently unite the different portions of the plurality of beams into a single exposure spot.
    Type: Application
    Filed: August 1, 2013
    Publication date: December 5, 2013
    Applicants: Laser Imaging Systems GmbH & Co. KG, Orbotech Ltd.
    Inventors: Stefan HEINEMANN, Wolfgang RETSCHKE, Holger WAGNER, Jonas BURGHOFF, Abraham GROSS
  • Publication number: 20130301114
    Abstract: An acousto-optic imaging device disclosed in the present application includes: an acoustic wave source; an acoustic lens system for converting a scattered wave produced by irradiation of an object with an acoustic wave emitted from the acoustic wave source into a predetermined converged state; an acousto-optic medium section which is arranged such that a scattered wave transmitted through the acoustic lens system is incident on the acousto-optic medium section; a light source for emitting a light beam which is formed by a plurality of superposed monochromatic light rays traveling in different directions; an image formation lens system for condensing diffracted light of a plurality of the monochromatic plane wave light rays produced at the acousto-optic medium section; and an image receiving section for detecting light condensed by the image formation lens system to output an electric signal.
    Type: Application
    Filed: July 15, 2013
    Publication date: November 14, 2013
    Inventors: Ushio SANGAWA, Takuya IWAMOTO, Yuriko KANEKO, Masahiko HASHIMOTO
  • Patent number: 8493645
    Abstract: An optically powered optical modulator comprises an optical modulation component, such as an electro-optical modulator, acousto-optic modulator or magneto-optic modulator, in combination with one or two lens assemblies positioned at one or both apertures of the optical modulation component, so that the optical modulator formed by the combination of the lens assembly or assemblies and the optical modulation component has optical focus power.
    Type: Grant
    Filed: August 7, 2012
    Date of Patent: July 23, 2013
    Assignee: PV Labs, Inc.
    Inventor: Eiji Yafuso
  • Patent number: 8487208
    Abstract: A laser beam irradiation apparatus includes a laser beam oscillation unit including a pulse laser beam oscillator for oscillating a pulse laser beam and a cycle frequency setting unit for setting the cycle frequency, an acousto-optic deflection unit for deflecting the optical axis of the pulse laser beam oscillated from the laser beam oscillation section, and a control unit for controlling the acousto-optic deflection unit. The control unit outputs a driving pulse signal having a predetermined time width including a pulse width of the pulse laser beam oscillated from the pulse laser beam oscillator to the acousto-optic deflection unit based on the cycle frequency setting signal from the cycle frequency setting section.
    Type: Grant
    Filed: August 8, 2007
    Date of Patent: July 16, 2013
    Assignee: Disco Corporation
    Inventors: Yutaka Kobayashi, Kouichi Nehashi, Keiji Nomaru, Yasuomi Kaneuchi
  • Publication number: 20130148188
    Abstract: Methods and apparatus for optimising, improving or maximising the efficiency of an acousto-optic lens (AOL) system are disclosed. Data relating to efficiency is used to select drive frequencies of the acousto-optic devices (AODs) forming the AOL, thereby both increasing the usable field of view and reducing a prior art patternation problem. Preferably according to the invention, drive frequencies are selected that maximise efficiency of transmission through the AOL. When scanning, the centre of each scan is optimised to be of maximum efficiency.
    Type: Application
    Filed: April 20, 2011
    Publication date: June 13, 2013
    Applicant: UCL BUSINESS PLC
    Inventors: Paul A. Kirkby, K.M. Naga Srinivas Nadella, R. Angus Silver
  • Patent number: 8462425
    Abstract: As disclosed herein, in a first aspect, a device may comprise: an oscillator producing a light output on a beam path; a target material for interaction with light on the beam path at an irradiation site; a beam delay on the beam path the beam delay having a beam folding optical arrangement; and a switch positioned along the beam path and interposed between the oscillator and the beam delay; the switch closable to divert at least a portion of light on the beam path from the beam path, the switch having close time, t1 and the beam path having a length, L1, along the path from the switch to the irradiation site; with t1<cL1, where c is the speed of light on the path, to protect the oscillator.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: June 11, 2013
    Assignee: Cymer, Inc.
    Inventors: Kai-Chung Hou, Richard L. Sandstrom, William N. Partlo, Daniel J. W. Brown, Igor V. Fomenkov
  • Publication number: 20130094071
    Abstract: A fast modular port switching device is described. The device can be used with an optical microscope to facilitate using multiple devices with the microscope. The port switching is done with a galvanometer for switching very fast. The device is modular so it can be combined with any number of similar devices for building a complex, multi-modal imaging system. Also described is the combination of a port switcher with automated spherical aberration correction. Even further described is a similar device where the outputs are recombined, thus making the device a fast filter switcher.
    Type: Application
    Filed: October 10, 2012
    Publication date: April 18, 2013
    Applicant: INTELLIGENT IMAGING INNOVATIONS, INC.
    Inventor: INTELLIGENT IMAGING INNOVATIONS, INC.
  • Patent number: 8422110
    Abstract: An optical switch changes the refractive index of an electro-optical crystal according to an electric field applied to the electro-optical crystal so as to switch depending on whether the electro-optical crystal enables incident light to pass through or whether the electro-optical crystal enables incident light to be totally reflected. The optical switch includes an electrode section including a plurality of electrodes and formed in the electro-optical crystal, a principal plane including the largest area of each electrode on a same plane of the electro-optical crystal; an insulator layer on at least one plane of the electro-optical crystal, the plane being parallel with the electrode section, the insulator layer made of an insulator with lower dielectric constant than the electro-optical crystal; and a temperature control device formed on and in contact with the insulator layer and controls a temperature of the electrode section or dissipates heat generated in the electrode section.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: April 16, 2013
    Assignee: NEC Corporation
    Inventors: Masahiko Ohta, Osamu Ishibashi, Fujio Okumura