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| Number | Title | Issue Date |
| 8040499 | Transmitted light refractometer 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 advantage... | 10/18/2011 |
| 7619725 | Optically amplified critical wavelength refractometer 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,... | 11/17/2009 |
| 7369221 | Portable refractometer A portable refractometer is provided that includes a lens barrel having a lens barrel axis. A prism is secured to one end of the lens barrel, the prism having an entry face that provides a boundary surface between the prism and a substance to be measured. A tube sha... | 05/06/2008 |
| 7280194 | Accurate determination of refractive indices of solid, fluid and liquid materials Systems and methodology for determining not only precise and repeatable results, but accurate values of the refractive index of solids, fluids and liquids. ... | 10/09/2007 |
| 7233391 | Optical device integrated with well 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... | 06/19/2007 |
| 7207678 | Prism for high contrast projection 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-st... | 04/24/2007 |
| 7061597 | Endoscope reprocessing and sterilization system 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 ... | 06/13/2006 |
| 6661504 | Failure detecting optoelectronic sensor 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 conf... | 12/09/2003 |
| 6480347 | Device for reproducible positioning of optical surfaces 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 ... | 11/12/2002 |
| 6435008 | Apparatus and method for determining porosity 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 pr... | 08/20/2002 |
| 6172746 | Transmitted light refractometer 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 detecti... | 01/09/2001 |
| 5969808 | Brake check handheld refractometer 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. ... | 10/19/1999 |
| 5926284 | Surface plasmon sensor 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 pri... | 07/20/1999 |
| 5880480 | Optical liquid level sensor including built-in test circuitry 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 bein... | 03/09/1999 |
| 5534708 | Optical fuel/air/water sensor and detector circuit 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 bein... | 07/09/1996 |
| 5125740 | Method and apparatus for measuring optical constants of a thin film as well as method and apparatus for fabricating a thin film utilizing same 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 emerg... | 06/30/1992 |
| 4539475 | Temperature compensation system for a prism in an optical transducer 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 l... | 09/03/1985 |
| 4353649 | Apparatus for surface stress measurement of glass coating and transparent plastic product 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... | 10/12/1982 |
| 4188116 | Abbe refractometer 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 ... | 02/12/1980 |
| 4181434 | Color compensation system for Abbe refractometer 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.... | 01/01/1980 |
