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| Number | Title | Issue Date |
| 6912049 | Electromagnetic radiation attenuating and scattering member with improved thermal stability The present invention provides a thermally stable reference member comprising, at least one radiation attenuating element and at least one radiation scattering element. The radiation attenuating element comprising at least one aperture for transmission of radiation ... | 06/28/2005 |
| 6783705 | Calibration medium for wavelength calibration of U.V. absorbance detectors and methods for calibration The invention features an optical medium for calibrating UV absorbance detectors, methods for making such an optical medium, and methods for calibrating UV absorbance detectors using such a medium. The optical calibration medium includes a gel-sol silica glass monol... | 08/31/2004 |
| 6423249 | Calibration medium for wavelength calibration of U.V. absorbance detectors and methods for calibration The invention features an optical medium for calibrating UV absorbance detectors, methods for making such an optical medium, and methods for calibrating UV absorbance detectors using such a medium. The optical calibration medium includes a gel-sol silica ... | 07/23/2002 |
| 5986751 | Atomic absorption photometer An atomic absorption photometer with a hollow cathode lamp and a deuterium lamp uses for each a power source which receives a variable current and switches it on and off so as to output a constant voltage.... | 11/16/1999 |
| 5910837 | Photomechanical transducer The invention relates to a photomechanical transducer which comprises a photochromic element made of a first material and attached on a carrier element made of a deformable second material. The first material of the photochromic element changes its molecu... | 06/08/1999 |
| 5686996 | Device and method for aligning a laser A device is provided for aligning a laser. For example, such a device could be used to align a laser as part of a particle measurement device in a semiconductor process tool. The device consists of a rigid member with alignment marks which define the inte... | 11/11/1997 |
| 5673113 | Analysis device for the automatic grading of products, in particular of fruits or vegetables The invention relates to an analysis device for the automatic grading of products, in particular of fruits or vegetables, comprising punctiform lighting means (4, 8, 12) capable of generating a polarised incident beam, means (19) for deflecting the polari... | 09/30/1997 |
| 5611998 | Optochemical sensor and method for production An optochemical sensor for measuring concentrations of analytes is provided with a reactive matrix preferably made of polymeric material capable of swelling. Further provided are a mirror layer and a layer of a plurality of discrete islands that are elect... | 03/18/1997 |
| 5329350 | Measuring laser beam parameters using non-distorting attenuation and multiple simultaneous samples An optical system for the attenuation of laser light for measurement purposes which includes four logical subassemblies including a first attenuator subassembly for the attenuation of high power laser light, a second attenuator subassembly for lower power... | 07/12/1994 |
| 5270872 | Superconducting submicron filter An optical filter structure for selectively blocking radiation of predetermined wavelength is described which comprises a layer of material characterized by transition from a superconducting phase to insulating phase upon heating to a characteristic trans... | 12/14/1993 |
| 5206118 | Acid-sensitive leuco dye polymeric films A color-change dosimeter film made of a halogen-containing polymer in which is dispersed an acid-sensitive leuco dye, which dye a) is substantially free from groups that are sensitive to high-energy radiation and b) becomes colored in acid. This color-cha... | 04/27/1993 |
| 5161068 | Superconducting searching filter An optical reflection band filter structure for selectively blocking radiation within a preselected range of wavelengths is described which comprises a plurality of multipole elements of preselected configuration deposited with prescribed spacing in a per... | 11/03/1992 |
| 5155634 | Superconducting reflection filter An optical reflection band filter structure for selectively blocking radiation within a preselected range of wavelengths is described which comprises a plurality of multipole elements of preselected configuration deposited with prescribed spacing in a per... | 10/13/1992 |
| 5142418 | Superconducting tunable inorganic filter An optical filter structure for blocking radiation at or shorter than a preselected design wavelength is described which comprises a substantially transparent dielectric host material having dispersed therethrough a multiplicity of grains in preselected s... | 08/25/1992 |
| 5107469 | Digital low-power programmable alarm clock for use with reflectance photometer instruments and the like A low-power programmable alarm clock system is provided for use with microprocessor-based reflectance photometer systems for generating an alarm control signal at pre-programmed alarm activation times. The system utilizes an alarm clock circuit which incl... | 04/21/1992 |
| 5007717 | Real time analyzer for pulsed laser systems A technique for the simultaneous measurement, in real time, of the changes in mode size, pulse length, and power of a wavetrain of laser pulses delivered by mode-locked or other pulsed laser systems contemplates directing respective portions of the beam a... | 04/16/1991 |
| 4729655 | Device for shaping the angular response of a light meter or the angular emission of a light source A fiber optic (12) and correcting element (18) combination with the property of providing shaped angular response when used in conjunction with a radiometer, and of providing shaped angular emission when used in conjunction with a light source.... | 03/08/1988 |
| 4431306 | Method and apparatus for precision control of radiometer A radiometer controller (11) of a radiation detector (10) is provided with a calibration method and apparatus comprised of mounting all temperature sensitive elements of the controller in thermostatically controlled ovens (26) during calibration and measu... | 02/14/1984 |
| 4381148 | Power meter for high energy lasers A power meter for non-destructively measuring the power of a high energy er beam. The power meter includes a cell disposed in the flow path of a gas containing a laser radiation-absorbing species. The absorption coefficient of the absorbing species is sm... | 04/26/1983 |
| 4252440 | Photomechanical transducer Light absorbing ultra-thin films mounted under a fixed strain exhibit the behavior of an optomechanicalor photomechanical transducer. The transducer responds to light in a quick and reversible manner converting a time-variable light source into a time-var... | 02/24/1981 |
| 4187026 | Photoacoustic method and apparatus for measuring intensity of electromagnetic radiation Electromagnetic radiation is detected, using a photoacoustic cell employing a uniform absorber of radiation which absorbs independently of wavelength.... | 02/05/1980 |
| 4130363 | Laser dummy load A hollowed frusto-conical member has its base mounted adjacent the output of a laser. The apex portion extends outwardly from the laser output. The design of the member causes laser light to reflect many times as it travels from the base at a large apertu... | 12/19/1978 |
| 3942899 | Calibrating device for light scatter photometering instrument A flat sandwich composite plate of nested wedge-shaped sheets of highly transparent and gray neutral density filter glasses is enclosed in a frame. A bracket on the frame mounts it on the carriage of an optical instrument which measures the light scatteri... | 03/09/1976 |
