Class 250/232 - Light chopper type

Subclass of Class 250 - Radiant energy
Definition: Subject matter having means for intermittently interrupting
No. of patents: 23
Last issue date: 02/05/2008

Number	Title	Issue Date
7326918	Optical position sensor architecture for servo systems System and method for an optical position sensor architecture for use in servo systems. A preferred embodiment comprises a light source configured to produce a light with an intensity dependent upon a control signal, a first light sensor and a second light sensor po...	02/05/2008
7247852	Methods and apparatus for sensor systems A sensor system according to various aspects of the present invention comprises a sensor viewing an area via an optical path and a strut at least partially interposed across the viewing area. The strut is configured to taper along the optical path towards the sensor...	07/24/2007
7132648	Uniform, non-disruptive, and radiometrically accurate calibration of infrared focal plane arrays using global scene motion A method of generating an image sequence that includes the steps of detecting scene irradiance using detectors in a focal plane array, generating an output image sequence for each of the detectors based on the detected irradiance, and correcting the output image seq...	11/07/2006
7102832	Method and apparatus for modulating infrared radiation A chopper for an imaging system includes a frame and a sheet that have different coefficients of thermal expansion. The frame has a space within it, and has at least one opening that allows radiation to pass through the space. The sheet has structure which influence...	09/05/2006
6172358	Multifunction input module Disclose is a multifunction input module comprising a clamping stage, an optical chopper, a light source, and a photo detector. The clamping stage has a pivoting rack with two axial holes which can support the shaft of the optical chopper. The clamping st...	01/09/2001
6152443	Optical device for detecting the printing media in printers An optical device for detecting the printing media in printers includes an element pivoting on two rotation pivots which are incorporated therein a certain distance apart and which are guided in respective independent curved grooves. The pivoting element ...	11/28/2000
6114690	Light-controlled safety switch for a punch press A light-controlled safety switch for an automated press includes an optical transmitter and receiver affixed to the press frame just above the press ram that redirects the light beam from vertical to horizontal. A light beam is directed downward from the ...	09/05/2000
5805056	Vehicle security system A vehicle security system 10 having a sensor 28 which selectively produces output signals based upon a threshold signal comparison, which automatically deactivates upon the presence of transmitter 20, and which may be used in combination with an existing ...	09/08/1998
5705811	System and apparatus for calibrating an image detector A system (10) for calibrating an image detector includes a calibration platform (16) supporting a calibration element (18). The calibration element (18) may be made up of a first lens (20) and a second lens (22), each having a curved surface to appropriat...	01/06/1998
5291261	Optical object detection system incorporating fiber optic coupling A system (4) for use in an automobile (2) for the detection of objects comprising: a light source (6); a plurality of spaced transmitter ports (10, 12) for respectively transmitting light to a plurality of fields of illumination (18, 20); an optical fiber...	03/01/1994
5165078	Multi-channel, multi-wavelength detection system A radiation aperture system where two sets of apertures are distributed in ring sections of like radius on two parallel rings. As one ring is rotated with respect to its counterpart, one aperture of each ring will align to pass a radiation beam through bo...	11/17/1992
4710619	Apparatus for generating a signal providing information regarding a radiating source, especially an infrared source Information regarding an object, especially brightness information, is obned by scanning the object with an optical scanner, especially an infrared scanner to provide a respective analog signal. The analog signal is produced by passing the received radia...	12/01/1987
4706046	Resonator made of nonpiezoelectric material with high quality coefficient The resonator (10) includes a monocrystal (11) of a nonpiezoelectric matel with low attenuation of elastic bulk waves, such as corundum, means of supporting the monocrystal fastened to the monocrystal at points corresponding to the vibration nodes, therm...	11/10/1987
4413179	Mechanical vibrator for light beam chopper A tuning fork type vibrator for an optical chopper in a photosensor, which vibrator oscillates at a single frequency. The vibrator comprises vibrating plates so disposed as to face each other with a predetermined spacing therebetween, and a stem portion o...	11/01/1983
4301345	Key switch actuation by torsion spring This invention relates to a novel actuation mechanism useful, for example, in key switch operation wherein a key stem shaped to mate with apertures in a keyboard arrangement or as individual switches contains oppositely disposed, inwardly deformable, flan...	11/17/1981
4202602	Multi-angular radiant energy modulator A radiant energy source modulator comprising a plurality of electro-mechanical drivers which operate individually to close an aperture through which radiant energy from an infrared laser light, etc., source must pass. Excitation of each of said drivers wi...	05/13/1980
4185274	High-speed electrooptical A/D converter An electrooptical analog-to-digital (A/D) converter. A laser beam is coupled into a waveguide which has been fabricated on an electrooptical crystal such as a lithium niobate LiNbO3 crystal. Electrodes are placed relative to the waveguide to fo...	01/22/1980
4045140	Means for near real time C-W laser source characterization A means for obtaining east-west and north-south information for characterng a continuous wave laser source using either time blanking and frequency modulation or scanning with orthogonal time functions....	08/30/1977
4028544	Radiant energy detection system A radiant energy detection system for discriminating between radiation from a target and ambient radiation wherein optical receiver means is arranged to produce two images of the observed field which are staggered along the direction of displacement of mo...	06/07/1977
3993901	Radiation detecting system In a spectrophotometry system, apparatus for modulating radiation in fixed phase relationship with an oscillatory electric signal, comprising a radiation interrupting member connected to an armature torsionally mounted in a magnetic field generated from s...	11/23/1976
3988683	Method and apparatus for generating a switching signal using odd and even harmonics and comparison of rectified harmonics to ratio potential A method for generating switching signals from an alternating current containing a harmonic or from a mixture of at least two alternating currents containing harmonics with adjacent fundamentals, characterized in that one even and one odd harmonic is filt...	10/26/1976
3985448	Angle or length measuring device A measuring device is disclosed which can measure an angle or length and which employs either an angle or length measuring plate. The angle or length measuring plate has thereon at least one measuring scale which has a regular pattern along the majority o...	10/12/1976
3956628	Light sensitive detection system A photoelectric detection system for a printer that is particularly useful for accurately detecting the position of type bearing or printing elements of known width and spacing as they pass a predetermined location. An output signal is generated that subs...	05/11/1976

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Class 250/232 - Light chopper type