Plural Prisms Patents (Class 356/137)
  • Patent number: 11060930
    Abstract: The invention provides a glass surface stress meter and multiple-tempered glass surface stress meter, and the glass surface stress meter includes a light source (810, 910), a light refraction element (820, 920) and an imaging unit. The light refraction element (820, 920) is provided at a light-emitting direction of the light source (810, 910) for placing a measured glass (970). The light from the light source (810, 910) comes into the imaging unit to imaging after refracted by the light refractive element (820, 920). The imaging unit includes lens group (830, 940) and a imaging sensor (840, 960). A front end of the lens group is provided at the light-refraction direction of the light refraction element (820, 920) and a back-end is provided with the imaging sensor.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: July 13, 2021
    Assignee: Suzhou PTC Optical Instrument Co., Ltd
    Inventors: Xiuxin Shang, Xudong Wang, Xiupu Wang, Fei Yan, Xiang Tang, You Wang
  • Patent number: 11002663
    Abstract: A gas injection device, wherein comprising: a gas channel including an air inlet provided at a upper portion therein and a gas outlet provided at a lower portion therein; and a light channel including an incident light channel and a reflected light channel provided at each side of the gas channel separately, wherein gases arrives at a surface of a sample to be tested via said gas channel and flows out from a slit between said light channel, the gas outlet of gas channel, and the surface of the sample to be tested, and gases flow in a manner of laminar flow with the Peclet number of an air flow being larger than 1. The gas injection device can effectively prevent air from returning back to the measurement system.
    Type: Grant
    Filed: December 26, 2018
    Date of Patent: May 11, 2021
    Assignee: JIANGSU LEUVEN INSTRUMMENTS CO LTD
    Inventor: Kaidong Xu
  • Patent number: 9506857
    Abstract: An automatic observation apparatus for detecting mineral samples comprises a base (1), a supporting arm (2), a sample fixing device (3), a stepper motor (4), a high-definition camera (5) and a control system (6). A refractometer is fixed on the base (1). A vertical through hole is formed at the top end of the supporting arm (2), and a lifting rod (211) penetrates through the vertical through hole and is matched with the vertical through hole in shape. A cavity is formed at the top end of the supporting arm (2), a gear (216) is mounted in the cavity, and the gear (216) is meshed with a rack (215) of the lifting rod (211).
    Type: Grant
    Filed: June 16, 2015
    Date of Patent: November 29, 2016
    Assignee: CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
    Inventors: Ying Song, Yongqiang Yang, Longwei Qiu, Yuming Zhao, Weichao Yang, Ying Qi, Andrei Stepashko
  • Patent number: 8692985
    Abstract: Methodology of determining refractive index and extinction coefficient of a prism shaped material, including simultaneously for a multiplicity of wavelengths using an easy to practice technique.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: April 8, 2014
    Assignee: J.A. Woollam Co., Inc.
    Inventors: Ronald A. Synowicki, Greg K. Pribil, Andrew C. Martin
  • Patent number: 8239144
    Abstract: A portable liquid design system includes a portable information handling system (IHS) that employs a liquid design application capable of operating in different modes to design different liquids such as corn syrup, espresso, coffee, soda pop and others. The portable liquid design system may include a refractometer to measure the refractive index and temperature of a liquid under test. The liquid design application may apply the measured refractive index and temperature to a 3 dimensional representation of the correlation of refractive index, temperature and concentration (% total dissolved solids) to determine a particular concentration corresponding to the measured refractive index and temperature. A single 3 dimensional scale may apply to virtually all values of interest of refractive index, temperature and concentration for a particular liquid under test.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: August 7, 2012
    Assignee: Voice Systems Technology, Inc.
    Inventor: Vincent Fedele
  • Patent number: 8040499
    Abstract: A transmitted light refractometer allows high measurement accuracy across a broad measurement range, even under difficult measuring conditions. The transmitted light refractometer can be connected to a process simply via a single access. In accordance with advantageous features, the transmitted light refractometer covers a measurement range for all practically relevant media and includes integrated temperature compensation. A reversing optics unit is arranged relative to an illumination optics unit such that the reversing optics unit deflects a parallel beam through the process liquid and a measurement prism into the transmitted light refractometer back to the side from which it was radiated. The illumination optics unit, an imaging optics unit, and a detector plane are arranged on the light radiation side such that only one process access is needed.
    Type: Grant
    Filed: October 23, 2008
    Date of Patent: October 18, 2011
    Assignee: Flexim Flexible Industriemesstechnik GmbH
    Inventor: Andreas Gloeckner
  • Patent number: 7655475
    Abstract: The invention provides a luminescent based sensor having a luminescent material optically coupled to a substrate, and adapted to be used in a medium or environment such as water or air. A detector is provided to detect light that is emitted into the substrate by the material. The substrate is adapted to redirect light that is emitted into the substrate at angles with the range ?esc ? ? ? ?lsc where ?esc is the critical angle of the environment/substrate interface and ?lsc is the critical angle of the luminescent layer/substrate interface. Examples of possible configurations are described.
    Type: Grant
    Filed: January 23, 2002
    Date of Patent: February 2, 2010
    Assignee: Fluorocap Limited
    Inventors: Brian MacCraith, Lubos Polerecky
  • Patent number: 7619725
    Abstract: A critical wavelength refractometer is provided. A broadband light source (413) is optically coupled to a sensor (401), the sensor having at least one sensing surface (407). As the light from the broadband light source passes through the sensor, it undergoes multiple internal reflections against the sensing surface. Due to the index of refraction of the material in contact with the sensing surface, a portion of the light passing through the sensor is reflected while a second portion of the light is transmitted through the sensing surface and into the material. A detector (421) coupled to the sensor measures the spectral intensity of the light that passes completely through the sensor after having undergone the multiple internal reflections against the sensing surface. A microprocessor (423) coupled to the detector determines the critical wavelength based on the spectral intensity measurement, thereby allowing the index of refraction of the material to be determined.
    Type: Grant
    Filed: May 12, 2008
    Date of Patent: November 17, 2009
    Assignee: Sealite Engineering, Inc.
    Inventor: George A. Seaver
  • Publication number: 20090103076
    Abstract: A transmitted light refractometer allows high measurement accuracy across a broad measurement range, even under difficult measuring conditions. The transmitted light refractometer can be connected to a process simply via a single access. In accordance with advantageous features, the transmitted light refractometer covers a measurement range for all practically relevant media and includes integrated temperature compensation. A deflecting optics unit is arranged relative to an illumination optics unit such that the deflecting optics unit deflects a parallel beam through the process liquid and a measurement prism into the transmitted light refractometer back to the side from which it was radiated. The illumination optics unit, an imaging optics unit, and a detector plane are arranged on the light radiation side such that only one process access is needed.
    Type: Application
    Filed: October 23, 2008
    Publication date: April 23, 2009
    Applicant: FLEXIM Flexible Industriemesstechnik GmbH
    Inventor: Andreas Gloeckner
  • Patent number: 7280194
    Abstract: Systems and methodology for determining not only precise and repeatable results, but accurate values of the refractive index of solids, fluids and liquids.
    Type: Grant
    Filed: November 30, 2004
    Date of Patent: October 9, 2007
    Assignee: J.A. Woollam Co., Inc.
    Inventors: Craig M. Herzinger, Steven E. Green, Gregory K. Pribil
  • Patent number: 7233391
    Abstract: Methods and systems are disclosed that include an optical device for providing information about one or more samples. The system includes well(s) for holding the sample(s), and in one embodiment, the optical device(s) have non-parallel sidewalls optically contacting the well(s) for providing the information about the sample(s) in the well(s). In some embodiments the optical devices may be truncated prism(s). In some embodiments the optical devices are part of a unibody structure with the well(s).
    Type: Grant
    Filed: November 12, 2004
    Date of Patent: June 19, 2007
    Assignee: PerkinElmer LAS, Inc.
    Inventors: Mack J. Schermer, Carl Brian Candiloro
  • Patent number: 7207678
    Abstract: Prism elements having TIR surfaces placed in close proximity to the active area of a SLM device to separate unwanted off-state and/or flat-state light from the projection ON-light bundle. The TIR critical angle of these prisms is selected to affect either the off-state light or additionally, any portion of flat-state light reflected from the SLM. To further improve the optical performance of the system, these TIR prisms can be attached directly to the SLM package, completely eliminating the package window.
    Type: Grant
    Filed: December 30, 2002
    Date of Patent: April 24, 2007
    Assignee: Texas Instruments Incorporated
    Inventor: Steven M. Penn
  • Patent number: 7061597
    Abstract: A system for reprocessing and sterilizing a previously used endoscope having at least one lumen is disclosed. The reprocessing system includes a reaction chamber into which individual chemical components of a sterilant are transferred by pneumatic force. The system includes a central processor which controls the asynchronous reprocessing and sterilization of at least two endoscopes. A novel sterilant is also disclosed. Also disclosed is a combination of the sterilization device and the sterilant and methods of using the same.
    Type: Grant
    Filed: July 3, 2002
    Date of Patent: June 13, 2006
    Assignee: Minntech Corporation
    Inventors: Raymond Paul Oberleitner, John E. Marxer, Ward J. Sly, Patricia M. Stanley, Gregory Worsnick, Kurt J. Weimer, Bruce D. Martin, Mary Beth B. Henderson, Bradley K. Onstad
  • Patent number: 6661504
    Abstract: An optoelectronic liquid sensor indicates failure of operative components therein. The sensor includes a light source, a light detector, and a transparent probe which functions as a primary liquid sensing prism. The transparent probe is of a suitable configuration permitting internal reflection of light transmitted therethrough from the light source, along a primary light path for reception by the light detector, when the light-impinged surface of the primary prism is in air. When the same surface of the probe is submersed in or exposed to liquid, light from the light source traveling along the primary light path is refractively transmitted into the liquid, and therefore almost no light reaches via the primary light path. A secondary light path is provided, along which a fraction of the light from the light source is also transmitted via internal reflection within a transparent body to the light detector.
    Type: Grant
    Filed: June 6, 2002
    Date of Patent: December 9, 2003
    Inventor: John Rakucewicz
  • Publication number: 20030103202
    Abstract: A monolithic fiber holder includes one or more V-grooves with a vacuum slot is formed in the apex of the V-groove utilizing electrical discharge machining to communicate with a vacuum feed aperture. Pilot holes are formed transversely through a vacuum feed aperture positioned in spaced relationship to the V-groove and communicate through a lower surface of the block and through the V-groove to allow an electrical discharge machining wire to extend transversely through the aperture in the V-groove to discharge erode a slot along the apex of the V-groove. The pilot hole extending through the vacuum feed hole is then sealed. In another embodiment, a shaped electrode probe is employed in a sinker-type electrical discharge method to erode the apex of a V-groove to form a vacuum slot between the vacuum feed aperture and the V-groove. The holders are preferably made of tungsten carbide.
    Type: Application
    Filed: November 30, 2001
    Publication date: June 5, 2003
    Inventor: Paul S. Schmitt
  • Patent number: 6480347
    Abstract: A plurality of magnets is provided in an illumination prism carrier of a transmitted light refractometer and a corresponding plurality of magnets is provided in a sample prism housing of the refractometer to align a light exit surface of the illumination prism relative to a sample surface of the sample prism and urge the optical surfaces together in an even and uniform manner. The magnets replace mechanical biasing arrangements for positioning the optical surfaces and function to consistently reproduce a measurement optical path in the instrument for improved accuracy and repeatability of measurements.
    Type: Grant
    Filed: September 14, 2000
    Date of Patent: November 12, 2002
    Assignee: Leica Microsystems Inc.
    Inventor: Erin D. Spring
  • Patent number: 6435008
    Abstract: The present invention is related to an apparatus and a non-destructive method for determining the porosity of an element, particularly a thin film, formed on a substrate, said substrate being positioned in a pressurized chamber, said chamber being at a predetermined pressure and at a predetermined temperature. According to this method a gaseous substance like e.g. toluene vapour is admitted in said chamber and after a predetermined period of time the porosity of the thin film is determined by means of at least on ellipsometric measurement. Particularly, the optical characteristics resulting from this in-situ ellipsometry are used to determine the amount of gaseous substance condensed in the pores of the film. These amounts are used to calculate the porosity of the film.
    Type: Grant
    Filed: August 16, 2001
    Date of Patent: August 20, 2002
    Assignees: Interuniversitair Microelecktronica Centrum, Centre for Advanced Technologies Technokom
    Inventors: Mikhail Rodionovich Baklanov, Fedor Nikolaevich Dultsev, Konstantin Petrovich Mogilnikov, Karen Maex
  • Patent number: 6172746
    Abstract: A transmitted light refractometer comprises an optical system having a movable mirror for redirecting light transmitted through a light-refracting sample to a beam splitter for dividing the light between first and second detection paths. The first detection path leads to an eyepiece whereby an operator may view an illumination boundary shadowline brought into the field of view of the eyepiece by adjusting the position of the movable mirror. The second detection path leads to a light-sensitive detector, preferably a linear scanned array, for generating signal information indicative of the location of the shadowline on the detector. An optical position sensor associated with the movable mirror includes a position detector providing signal information indicative of the position of the movable mirror.
    Type: Grant
    Filed: October 27, 1999
    Date of Patent: January 9, 2001
    Assignee: Leica Microsystems Inc.
    Inventors: Michael J. Byrne, Thomas E. Ryan, Kyle R. Bleyle, Keshav D. Sharma, Robert C. Atkinson, David J. Cash
  • Patent number: 5969808
    Abstract: A refractometric apparatus and method for monitoring the percentage of water in hydraulic fluids employ a temperature sensitive device allowing a user to obtain accurate and correct readings of various measured properties on the reticle of the apparatus. In particular, the temperature sensitive member comprises a prism-wedge-mirror combination in conjunction with a bimetallic strip. The combination ensures the proper angular displacement of a light beam inside the refractometric apparatus and, therefore, the correct readings on the reticle.
    Type: Grant
    Filed: June 15, 1998
    Date of Patent: October 19, 1999
    Assignee: LeicaMicrosystems, Inc.
    Inventors: Christopher T. Cotton, Jeffrey M. Sabin, Thomas E. Ryan
  • Patent number: 5926284
    Abstract: A surface plasmon sensor comprises a prism, a metal film, which is formed on one surface of the prism and is brought into contact with a sample, and a light source for producing a light beam. An optical system causes the light beam to pass through the prism and to impinge upon an interface between the prism and the metal film such that various different angles of incidence may be obtained with respect to the interface. A photodetector detects an intensity of the light beam, which has been totally reflected from the interface, with respect to each of the various different angles of incidence. An electrode stands facing the metal film with a liquid sample intervening therebetween, and a DC voltage is applied across the electrode and the metal film. A substance contained in the liquid sample is thus analyzed quickly and with a high sensitivity.
    Type: Grant
    Filed: April 29, 1998
    Date of Patent: July 20, 1999
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masayuki Naya, Taizo Akimoto
  • Patent number: 5880480
    Abstract: A liquid sensing apparatus for a fuel tank comprises a first optical sensor for producing an output having a first state that corresponds to the first optical sensor being exposed to air and a second state that corresponds to the first optical sensor being exposed to fuel; and a circuit for detecting the first and second optical sensor output states. The sensor circuit also has self test capability for testing both active and passive components. The sensor circuits can be accessed using a two wire only interface, and thermal stability can be achieved with the electronic circuit as shown.
    Type: Grant
    Filed: March 13, 1997
    Date of Patent: March 9, 1999
    Assignee: Simmonds Precision Products, Inc.
    Inventors: Sylvester M. Ellinger, Ralph E. Burt, Jerre G. Longfellow, Robert D. LaClair
  • Patent number: 5534708
    Abstract: A liquid sensing apparatus for a fuel tank comprises a first optical sensor for producing an output having a first state that corresponds to the first optical sensor being exposed to air and a second state that corresponds to the first optical sensor being exposed to fuel; a second optical sensor for producing an output having a first state that corresponds to the second optical sensor being exposed to air or water, and a second state that corresponds to the second optical sensor being exposed to fuel; and a circuit for detecting the first and second optical sensor output states. The sensor circuits can be accessed using a two wire only interface, and thermal stability can be achieved with the electronic circuit as shown.
    Type: Grant
    Filed: December 15, 1993
    Date of Patent: July 9, 1996
    Assignee: Simmonds Precision Products Inc.
    Inventors: Sylvester M. Ellinger, Bruce R. Kline
  • Patent number: 5125740
    Abstract: A sample is located so as to be close to a prism and a light beam coming from a light source is projected to the prism while varying the incident angle to the prism as a parameter. The incident light beam to the prism is propagated therein and light emerging from the bottom surface of the prism, which is in contact with the sample, is projected to the sample. At the same time the intensity of light reflected by the bottom surface of the prism is measured. Optical constants such as the refractive index, the film thickness, the distribution of the refractive index, etc. are obtained by calculation, starting from measured values thus obtained.
    Type: Grant
    Filed: February 15, 1990
    Date of Patent: June 30, 1992
    Assignee: Hitachi, Ltd.
    Inventors: Hidemi Sato, Yasuo Hira, Atsuko Fukushima, Hiroshi Asao, Kazumi Kawamoto, Kenchi Ito, Ryuichi Funatsu
  • Patent number: 4539475
    Abstract: A system that provides temperature compensation in an optical transducer that uses a prism for the purpose of determining a load applied thereto and which may be used to find the weight of an object. When material such as plastic, glass, crystal and the like experiences a change in temperature, its index of refraction changes. By combining prisms, compensation may be made for the change of temperature.
    Type: Grant
    Filed: March 14, 1983
    Date of Patent: September 3, 1985
    Assignee: Pitney Bowes Inc.
    Inventor: Thomas W. Bosse
  • Patent number: 4353649
    Abstract: Disclosed is an apparatus for measuring surface stress of glass coating and transparent plastic product, which comprises means for projecting the coherent light on the surface of the object to be measured, an output prism having a refractive index greater than that of said surface, mounted proximal to the light incident point on said surface in such a manner that one face thereof is in optically close contact with said surface, a telescope to measure the critical angle at the interface of said surface and said output prism in respect of the projected light from said output prism, and a polarizer located on the optical path of said projected light. The apparatus facilitates easily a direct and non-destructive measurement of the surface stress without any complex calculation.
    Type: Grant
    Filed: July 2, 1980
    Date of Patent: October 12, 1982
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventor: Toru Kishii
  • Patent number: 4188116
    Abstract: A follower mechanism is used to determine the precise location of a moveable mirror in an Abbe Refractometer to provide the necessary information for converting mirror position to index of refraction. The mechanism is particularly suitable for conversion and readout by electronic means.
    Type: Grant
    Filed: February 21, 1978
    Date of Patent: February 12, 1980
    Assignee: American Optical Corporation
    Inventor: Stephen A. Bartfay-Szabo
  • Patent number: 4181434
    Abstract: The effect of angular errors or mismatching indices of refraction of color-compensation prisms of Abbe refractometers can be virtually eliminated by decentration of the lens used to image light on the refractometer reticle.
    Type: Grant
    Filed: June 2, 1977
    Date of Patent: January 1, 1980
    Assignee: American Optical Corporation
    Inventor: Robert J. Meltzer