Using Plural Beams Patents (Class 356/309)
  • Patent number: 8929642
    Abstract: A three-dimensional scanner according to one aspect of the embodiments includes an irradiation unit, an imaging unit, a position detecting unit, and a scanning-region determining unit. The irradiation unit emits a slit-shaped light beam while changing an irradiation position with respect to a measuring object. The imaging unit sequentially captures images of the measuring object irradiated with the light beam. The position detecting unit detects a position of the light beam in an image captured by the imaging unit by scanning the image. The scanning-region determining unit determines a scanning region in an image as a scanning target by the position detecting unit based on a position of the light beam in an image captured by the imaging unit before the image as a scanning target.
    Type: Grant
    Filed: March 5, 2012
    Date of Patent: January 6, 2015
    Assignee: Kabushiki Kaisha Yasakawa Denki
    Inventor: Yuji Ichimaru
  • Patent number: 7732758
    Abstract: An on-chip micro-fluidic device (10) fabricated using a semiconductor material. The device has a micro-fluidic channel or chamber (14) defined within the material and one or more monolithically integrated semiconductor lasers (12) operate to form an optical trap in the channel or chamber (14).
    Type: Grant
    Filed: May 10, 2005
    Date of Patent: June 8, 2010
    Assignee: The University Court of the University of St. Andrews
    Inventors: Kishan Dholakia, Thomas F. Krauss, Simon John Cran-McGreehin
  • Patent number: 7533000
    Abstract: A method of analyzing a dataset of spectra is provided in which each spectrum has a count value for each of a number of parameter values within a parameter range. The method is for identifying one or more parameter values that exhibit a significant variation within the dataset. A dataset of spectra is obtained and a statistical analysis is applied to the count values for each of the parameter values. The result of the analysis for each parameter value is a function of the variation in the count values. A spectrum that is representative of at least part of the dataset of spectra is then displayed together with the results of the statistical analysis. A corresponding computer program and system for performing the method are also disclosed.
    Type: Grant
    Filed: July 28, 2006
    Date of Patent: May 12, 2009
    Assignee: Oxford Instruments Analytical Limited
    Inventors: Peter John Statham, Charles Penman
  • Patent number: 7525724
    Abstract: A laser system (10) for use in photonic excitation investigation of a target object, in which the target object interacts with incident photons and emits a corresponding photon which is detected and used to generate an image of the target object. The laser system (10) includes a pulsed fiber laser (14) for producing a laser beam, and a non-linear photonic crystal fiber (16) for carrying the laser beam from the laser (14) to an instrument (18) for photonically exciting the target object. The photonic crystal fiber (16) allows for switching, or tuning, the wavelength of the laser beam. In two-photon microscopy, the laser system (10) allows for providing multiple wavelengths for exciting a plurality of different fluorophores simultaneously. In coherent Raman imaging and spectroscopy, the laser system (110) allows for using a single laser to provide two laser beams of different wavelengths.
    Type: Grant
    Filed: March 16, 2007
    Date of Patent: April 28, 2009
    Assignee: The University of Kansas
    Inventors: Rongqui Hui, Carey K. Johnson
  • Patent number: 7505126
    Abstract: A method for monitoring hydrogen gas and a hydrogen flame wherein an object light having a wavelength of about 309 nm and resulting from two or more laser beams, which have been irradiated to a space to be monitored, is collected and converted to an electronic image, and the electronic image is amplified and converted back to an optical image, thereby imaging a spatial intensity distribution of light at a specific wavelength. A device for monitoring hydrogen gas and a hydrogen flame, which comprises two or more laser beam sources, means for collecting an object light having a wavelength of about 309 nm and resulting from laser beams, which have been irradiated to a space to be monitored, image producing means for converting the object light to an electronic image, amplifying the electronic image, and converting back the amplified electronic image to an optical image, and means for imaging a spatial intensity distribution of light at a specific wavelength.
    Type: Grant
    Filed: June 9, 2004
    Date of Patent: March 17, 2009
    Assignee: Shikoku Research Institute Incorporated
    Inventors: Hideki Ninomiya, Koji Ichikawa, Hirofumi Miki, Tasuku Moriya
  • Patent number: 7016053
    Abstract: Luminous intensity and chromaticity of each luminescent light source are measured for an impressed current value, a mixing ratio of intensities of lights emitted from luminescent light sources required for synthesizing lighting intensity with the preset chromaticity at the luminous intensity instructed by an instruction value is computed with a theoretical equation for computing changes in chromaticity correlating to changes in luminous intensities of the luminescent light sources for color synthesis (ST33), luminous intensities of each luminous light source for generating a luminous intensity instructed by an instruction value from a mixing ratio are computed (ST34), and the impressed current value required for making each luminous light source emit light at the luminous intensity is read out from the characteristics of luminous light sources (ST35).
    Type: Grant
    Filed: March 10, 2003
    Date of Patent: March 21, 2006
    Assignee: Mitutoyo Corporation
    Inventors: Eisuke Moriuchi, Seiji Shimokawa, Keiji Akagi
  • Patent number: 6795175
    Abstract: The surface specific optical diagnostic system includes a first optical source for providing a first laser input directable to an area of a surface to be interrogated. A second optical source provides a second laser input directable to that surface area. These lasers are alignable so that their surface areas of optical illumination overlap on the interrogated surface. An output wavelength discriminator receives reflections of the first and second laser inputs from the interrogated surface. The output wavelength discriminator is substantially non-transmissive at the frequencies of the first laser input and the second laser input but is substantially transmissive at the sum-frequency of the first laser input and the second laser input. Imaging optics receive an output of the wavelength discriminator and direct the propagation of the output so that a real image is formed after propagation through the imaging optics.
    Type: Grant
    Filed: May 21, 2002
    Date of Patent: September 21, 2004
    Assignee: The Boeing Company
    Inventor: Jeffrey H. Hunt
  • Patent number: 6788405
    Abstract: First and second laser inputs are directed to a location on a semiconductor wafer to be interrogated. A first signal analyzer receives a first light signal at a first second-harmonic wavelength generated by the first laser input and converts the signal to a first electronic signal, thus monitoring the intensity of the first second-harmonic wavelength as a function of contamination. A second surface optical signal analyzer provides a similar function at a second second-harmonic wavelength generated by the second laser input and provides a second electronic signal. A third surface optical signal analyzer receives a third light signal at a sum-frequency wavelength generated by the first laser input and the second laser input on the semiconductor wafer to be interrogated and converts the light signal to a third electronic signal. An electronic signal analyzer compares the first, second and third electronic signals for determining the level of semiconductor wafer contamination.
    Type: Grant
    Filed: June 12, 2002
    Date of Patent: September 7, 2004
    Assignee: The Boeing Company
    Inventor: Jeffrey H. Hunt
  • Patent number: 6781686
    Abstract: Two laser inputs having pulse durations of about 50-100 femtoseconds are directed to an area of a surface to be interrogated. The lasers are aligned so that their surface areas of optical illumination overlap on the interrogated surface. An optical delay line temporarily synchronizes the two inputs. An output wavelength discriminator receives reflections of the inputs from the interrogated surface and is substantially non-transmissive at the frequencies of the first laser input and the second laser input, but is substantially transmissive at the sum-frequency of the first input and the second input. Imaging optics direct the propagation of the output so that a real image is formed. A position sensitive detector monitors the intensity of the real image at the sum-frequency and an electronic signal equivalent to the real image is provided.
    Type: Grant
    Filed: June 19, 2002
    Date of Patent: August 24, 2004
    Assignee: The Boeing Company
    Inventor: Jeffrey H. Hunt
  • Patent number: 6727988
    Abstract: A spectrophotometer and spectrophotometry method, using a precision drive at a photodiode array which precisely moves the photodiode array by a distance equal to the physical interval between the photodiodes of the photodiode array so that the spectrophotometer and spectrophotometry method primarily measures light intensities of incident light by the photodiode array, and when precisely moves the photodiode array using the drive by the distance equal to the physical interval between photodiodes of the photodiode array, measures the light intensities of the incident light at desired positions corresponding to the intervals.
    Type: Grant
    Filed: April 11, 2001
    Date of Patent: April 27, 2004
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Soo Hyun Kim, Kyung Chan Kim, Se Baek Oh
  • Patent number: 6683685
    Abstract: In an atomic absorption photometer, depending on a fact whether a background correction is carried out or not, a pattern of a pulse lighting of light sources and a timing of sampling a light receiving signal are changed. Namely, at the time of a background correction measurement, one cycle is divided into three periods, that is, a period of lighting HCL, a period of lighting D2L, and an off period, and at the time of a measurement without a background correction, one cycle is divided into the period of lighting HCL and the off period. Accordingly, at the time of the measurement without the background correction, the period of lighting HCL and the off period become longer, and signal-to-noise ratio of the light receiving signal is improved. Accordingly, an absorbance with high accuracy can be calculated.
    Type: Grant
    Filed: December 4, 2001
    Date of Patent: January 27, 2004
    Assignee: Shimadzu Corporation
    Inventor: Masumi Sakai
  • Patent number: 6654118
    Abstract: This invention relates to a method and apparatus for the analysis of pharmaceutical specimens by nondestructively obtaining the molecular data for a chemical component on the surface or within the matrix of a pharmaceutical specimen.
    Type: Grant
    Filed: January 9, 2003
    Date of Patent: November 25, 2003
    Assignee: Ortho-McNeil Pharmaceutical, Inc.
    Inventor: Richard David Bruce
  • Patent number: 6597449
    Abstract: A system and method for real time process control, using a linearly swept tunable laser, which allows high speed in-situ monitoring and control of wavelength-specific properties of optical components. The invention comprises scanning an optical component with a high speed, high linearity tunable laser, and detecting optical output from the component during the scanning. Preferably, the invention also includes adjusting or controlling the optical properties of the component during scanning, according to detected optical output from the component. The invention is embodied in a process control system comprising a high speed, high linearity, tunable operatively coupled to an optical component which in turn is operatively coupled to an optical detector. A system control processor is operatively coupled to the tunable laser and detector. A processing control unit is associated with the optical component and is operatively coupled to the system control processor.
    Type: Grant
    Filed: January 31, 2000
    Date of Patent: July 22, 2003
    Assignee: New Focus, Inc.
    Inventors: Gregory L. Smolka, Mark Wippich, Carter F. Hand, Robert John Shine, Jr.
  • Patent number: 6373579
    Abstract: The present invention provides an apparatus and method for determining the dimension of an object. The apparatus of the present invention includes a transmitter that is positioned at a first point of interest on an object. The transmitter transmits a scanning light beam rotated at a predetermined angular velocity. Located at a second point of interest on the object is a target. At least a portion of the target defines a first plane that reflects the scanning light beam as the scanning light beam traverses across the target. To receive the reflected signal from the target, the apparatus of the present invention further includes a receiver positioned at the first point of interest. Additionally, the apparatus of the present invention includes a processor for processing the reflected signal and determining the dimensions of the object. In operation, the scanning light beam scans the target, where the radius of the arc that the light beam traverses across the target defines the dimension of the object.
    Type: Grant
    Filed: May 26, 1999
    Date of Patent: April 16, 2002
    Assignee: Hand Held Products, Inc.
    Inventors: Lawrence Richard Ober, Raymond Andrew Orr
  • Patent number: 6147746
    Abstract: To calculate the distance and angle of a measuring platform with respect to reference marks, fans of light are emitted from the measuring platform by light emitters. The light emitters are therefore arranged on a circular path about the central axis to rotate in such a manner that the fans of light are emitted tangentially to the circular path. The distance and the angle can be calculated on the basis of the angle of the reflected fans of light received on the measuring platform by the trigonometric method. This arrangement according to the invention results in precise measurements of the distance and the angle in one circular passage of the light emitter, even when the measuring platform is moving.
    Type: Grant
    Filed: April 8, 1999
    Date of Patent: November 14, 2000
    Assignee: J. Muller AG
    Inventor: Heinz Jager
  • Patent number: 5933234
    Abstract: A multiple optical head interferometer comprises one Light Source-Detection-Computing unit and multiple optical heads. The diameters of all of the optical heads are of equal size, and oriented in the same direction. Shutters or adjustable mirrors are provided such that the Light Source-Detection-Computing unit is used with only one optical head at a time. The multiple optical head interferometer of the present invention may measure many workpieces quickly in a short time, as while one workpiece is being measured, others may be setup for measurement or removed for further processing. In a first embodiment, the branching device for branching the laser beam comprises a plurality of beam splitters. Shutters are used to control which optical head is to be used with the Light Source-Detection-Computing unit at a particular time. In the second and preferred embodiment of the present invention, branching out of the optical heads is achieved by using adjustable mirrors and reflection.
    Type: Grant
    Filed: August 11, 1998
    Date of Patent: August 3, 1999
    Inventor: Philip Lam
  • Patent number: 5910767
    Abstract: A light beam, preferably from a laser, is reflected from a target, which is a potential intruder. The time period required for the beam to return to a light detector, as well as the intensity of the reflected light, is recorded. The system includes a computer and software for analyzing the measurements of distance and intensity of reflected light. The algorithm for detecting the presence of an intruder is based on changes in the measured distance and/or intensity of reflected light from initial measurements made during a "learning" period. The system tracks targets using data collected in consecutive searches of the area to be protected. Preferably, an alarm is sounded and/or a video camera is slaved to the system.
    Type: Grant
    Filed: July 11, 1997
    Date of Patent: June 8, 1999
    Assignee: Laser Guard
    Inventor: Yaacov Frucht
  • Patent number: 5896201
    Abstract: An optical device for wavelength monitoring and wavelength control. The optical device has an optical element having a first surface and a second surface not parallel to each other. The optical element separates a light beam supplied to the first surface into a first beam reflected on the first surface, a second beam passed through the first surface, reflected on the second surface, and passed through the first surface again, and a third beam passed through the first surface and the second surface in this order. An optical filter is provided so as to transmit the first and second beams. The optical filter has wavelength characteristics different according to an incidence angle. The first and second beams passed through the optical filter are supplied to first and second photodetectors, respectively. On the basis of such a difference in wavelength characteristic, the wavelength of the light beam can be monitored according to outputs from the first and second photodetectors.
    Type: Grant
    Filed: March 3, 1998
    Date of Patent: April 20, 1999
    Assignee: Fujitsu Limited
    Inventor: Nobuhiro Fukushima
  • Patent number: 5838428
    Abstract: A high-resolution range imaging system and method can sense the presence of and determine the position or range of each point on the surface of an object through triangulation calculation methods. A moving pattern of light is projected onto the object to be imaged. This resulting moving light pattern, comprised of vertical planes of light, is achieved by projecting light through a moving mask having a DeBruijn code formed thereon, the light being projected through the mask to provide blurring. The light source has a slit or the like which is between one and two times as wide as the narrowest stripe on the mask. Each light ray of the incoming reflected light pattern is recorded by a detecting device, such as a charge coupled device camera (CCD camera). The detecting device measures the blurring of the light pattern and records the associated gray-scale value, a measurement of the reflected light intensity, at each pixel location.
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: November 17, 1998
    Assignee: United States of America as represented by the Secretary of the Navy
    Inventors: Frank Pipitone, Ralph L. Hartley
  • Patent number: 5808738
    Abstract: A system and method are provided for the characterization of a sample containing a macromolecule in solution. A light source illuminates the sample, generally in the ultraviolet-visible wavelength range, and a plurality of sensors that are radially disposed about the sample at a plurality of observation angles simultaneously sense the light energy emerging from the sample. An intensity spectrum is calculated as a function of wavelength for each observation angle, from which is calculated a particle characteristic such as shape, conformational change, composition, and particle size distribution. Both scattering and absorption data are utilized to provide complementary information.
    Type: Grant
    Filed: January 10, 1997
    Date of Patent: September 15, 1998
    Assignee: University of South Florida
    Inventor: Luis Humberto Garcia-Rubio
  • Patent number: 5781269
    Abstract: A light having a single wavelength which is emitted from a light emitting element comprising a light emitting diode, a semiconductor laser or the like is changed to a parallel light by a collimator lens. The parallel light emitted from the collimator lens which has been changed or is being changed to such a beam as to keep a small beam diameter for a long distance by a conical lens is irradiated on a surface of an object to be measured. The light diffused from the surface of the object to be measured is collected into a position detecting element by a condenser lens so that a distance on the surface of the object to be measured can be measured.
    Type: Grant
    Filed: April 22, 1997
    Date of Patent: July 14, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masami Ito, Kanji Nishii, Tsuyoshi Nomura, Seiji Hamano
  • Patent number: 5774207
    Abstract: The present invention offers a light scanner which is compact and highly precise during high-speed operation, has a long lifespan, and is resistant to influence by external acceleration. Specifically, a light beam emitted from an optical source 20 is separated into two light beams by means of a light beam separation means 30, and these light beams are deflected by a mirror 43 on the scanner 40. On of the light beams is used for the object of usage, while the other light beam is made incident on a photo detector 50 which outputs a signal based on the incident position of the light beam, in order to determine the deflection angle of the light beam based on vibrations of the mirror 43.
    Type: Grant
    Filed: June 27, 1996
    Date of Patent: June 30, 1998
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Masaharu Yoshida, Ken'ichi Arakawa, Kazuyoshi Tateishi
  • Patent number: 5751407
    Abstract: An optical radar device has a vertical deflecting device which deflects an optical beam so as to emit the optical beam horizontally in a first half of reciprocal scanning in a horizontal direction and a part thereof upwards by a predetermined angle in a second half thereof. Thus, the optical radar device can detect both objects each with a reflecting portion installed at a low position such as a car and at a high position such as a truck.
    Type: Grant
    Filed: July 9, 1996
    Date of Patent: May 12, 1998
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Hiroshi Yamabuchi
  • Patent number: 5717484
    Abstract: A first light receiving portion and a second light receiving portion are provided on the upper surface of a moving body having driving wheels at an interval of a prescribed distance in a plane. The first light receiving portion and the second light receiving portion rotate around the axis in the vertical direction. On the other hand, a first light emitting portion and a second light emitting portion are provided on the side face of a station serving as a reference station at an interval of a prescribed distance in a plane. The first and second light receiving portions carry out sampling while rotating, so that the quantity of light reception is changed according to the directivities of the first and second light receiving portions. When the peaks of the directivities of the first and second light receiving portions match the direction of the first light emitting portion or the second light emitting portion, the quantity of light reception is maximized.
    Type: Grant
    Filed: March 17, 1995
    Date of Patent: February 10, 1998
    Assignee: Minolta Co., Ltd.
    Inventors: Takayuki Hamaguchi, Nobukazu Kawagoe
  • Patent number: 5629756
    Abstract: A laser beam projection apparatus is capable of supplying laser beams finely converged on an object at all times irrespective of a distance to the object. The laser beam projection apparatus has a laser beam generator, including a focus adjusting device, for supplying laser beams periodically swept within one plane and, at the same time, converged at a controllable distance, a light receiving element for receiving reflected laser beams from a predetermined object and generating an output signal, a distance calculating unit for calculating a distance to the object on the basis of the output signal and a controller for operating the focus adjusting device so that the swept laser beams are converged in a position corresponding to the calculated distance. The controller can change a sweep speed of the laser beam in accordance with a change in the calculated distance. The controller cna change a sweep speed of the laser beam in accordance with a change in the calculated distance.
    Type: Grant
    Filed: January 31, 1995
    Date of Patent: May 13, 1997
    Assignee: Nikon Corporation
    Inventor: Eiichi Kitajima
  • Patent number: 5579102
    Abstract: Improved transmitter and receiver units for use in spatial measurement system that are easy and inexpensive to manufacture while providing a high degree of reliability are disclosed. Specifically, the laser transmitter includes a laser emitter, a bearing/motor assembly coupled to the laser emitter, the bearing/motor assembly including a rotatable hollow spindle shaft through which a laser beam generated by the laser emitter passes and a motor for driving the spindle shaft, a prism assembly coupled to the spindle shaft, wherein the prism assembly divides the laser beam generated by the laser emitter into a pair of fanned laser beams, and reflecting means for reflecting the fanned laser beams generated by the prism assembly as counter-rotating fanned laser beams. The receiver unit preferably includes at least one optical receiver coupled to an extension member, a processing unit coupled to the optical receiver, and a receiver interface coupled to the processing unit.
    Type: Grant
    Filed: October 5, 1995
    Date of Patent: November 26, 1996
    Assignee: Spatial Positioning Systems, Inc.
    Inventors: Timothy Pratt, Andrew W. Dornbusch, Yvan J. Beliveau, Eric J. Lundberg, Michael H. Sweeney
  • Patent number: 5515156
    Abstract: A safety distance measuring device employing an electromagnetic wave is provided. A laser diode 2 is energized to emit laser beams by a laser diode drive circuit 3 in accordance with a clock signal generated by a control circuit 29. The emitted laser beams are sequentially changed to predetermined scanning directions by a scanner 1 associated with control circuit 29. The scanned laser beams from scanner 1 are reflected by an object 19 to be received by a photodiode 5. An output of the photodiode is applied to control circuit 29 through a light receiving circuit 6 where an elapsed time from emission to receipt is computed to obtain a distance from scanner 1 to object 19. Based on data relating to scanning directions by a scanning position detector 4, a begin-and-end detecting circuit 28 can stop the radiation of electromagnetic waves around a scanning start point and a scanning end point which is danger to human bodies.
    Type: Grant
    Filed: July 25, 1994
    Date of Patent: May 7, 1996
    Assignee: Omron Corporation
    Inventors: Masato Yoshida, Yoshiro Tasaka, Wataru Ishio, Hidenori Miyazaki
  • Patent number: 5504569
    Abstract: A distance-velocity predicting system has an illuminator for projecting a light beam for searching for an obstacle, and a plurality of position sensors spaced at a distance corresponding to a base line length. A minimum value of a distance component from the base line to an obstacle lying in a direction perpendicular to the base line, which is obtained from the light beam and the position sensors, or a value in the neighborhood of the minimum value, is sampled to obtain time-series data, and a relative velocity component in a direction perpendicular to the base line with respect to the obstacle is obtained in real time by using the time-series data. The relative velocity component perpendicular to the base line is compared with a predetermined threshold value, and when the relative velocity component exceeds the threshold value, a starting signal for life protecting equipment is generated.
    Type: Grant
    Filed: November 24, 1993
    Date of Patent: April 2, 1996
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Masahiko Kato, Hiroshi Matsuzaki, Tadashi Morokuma
  • Patent number: 5364492
    Abstract: A new method for accurately and sequentially growing monolayers and creating new superlattice structures employing a MBE thermal source control technique employing a quasi-double beam atomic absorption background correction measurements with the beam blocked and with the beam unblocked and by calculating the concentration based on the: ##EQU1## and applying corrections for non-linear absorption curves because of comparable spectral bandwidth of the molecular beam.
    Type: Grant
    Filed: September 17, 1992
    Date of Patent: November 15, 1994
    Assignee: Varian Associates, Inc.
    Inventors: James N. Eckstein, Ivan Bozovic, Martin E. Klausmeier-Brown, Gary F. Virshap
  • Patent number: 4241997
    Abstract: A laser beam from a tunable laser is split into two paths containing an etalon and a sample cell respectively. The two paths are chopped at different frequencies. The paths are combined and fed to a monochromator and then detected by a single detector. Lock-in amplifiers tuned to the chopper frequencies and responsive to the detector output produce signals corresponding to the spectra arising from the etalon and the sample gas absorption. A recorder simultaneously displays the two spectra.
    Type: Grant
    Filed: December 11, 1978
    Date of Patent: December 30, 1980
    Assignee: General Motors Corporation
    Inventor: Andrew R. Chraplyvy