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Class Information
Number: 250/233
Name: Radiant energy > Photocells; circuits and apparatus > Optical or pre-photocell system > Light valve (e.g., iris diaphragm) > Light chopper type > Rotary
Description: Subject matter in which the means for intermittently interrupting the optical path is a rotary element.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7358865 |
Optical encoder and apparatus using optical encoder |
Apr. 15, 2008 |
| 7277053 |
Apparatus and methods for detecting and locating signals |
Oct. 2, 2007 |
| 7161733 |
Remote sensing apparatus and a frequency analysis method of the remote sensing apparatus |
Jan. 9, 2007 |
| 7105801 |
Actuator with interrupter-type limit switches |
Sep. 12, 2006 |
| 7019667 |
System and method for accurate reading of rotating disk |
Mar. 28, 2006 |
| 6784807 |
System and method for accurate reading of rotating disk |
Aug. 31, 2004 |
| 6785635 |
Apparatus and method for predicting failures of spinning disks in turbo-machinery |
Aug. 31, 2004 |
| 6580064 |
Background rejection circuit |
Jun. 17, 2003 |
| 6525309 |
Optoelectronic sensor |
Feb. 25, 2003 |
| 6437324 |
Timing ruler or timing disk and process for its manufacture |
Aug. 20, 2002 |
| 6357695 |
Reticle for use in a guidance seeker for a spinning projectile |
Mar. 19, 2002 |
| 6184518 |
Rotary encoder with multiple calibration points |
Feb. 6, 2001 |
| 6111249 |
Submergible optical sensor housing with protective shutter and methods of operation and manufacture |
Aug. 29, 2000 |
| 6084235 |
Self aligning color wheel index signal |
Jul. 4, 2000 |
| 6034371 |
Semi-opaque chopper for thermal imaging system and method |
Mar. 7, 2000 |
| 5818049 |
Infrared gas spectrometer having a lid assembly with an integrated chopper and chopper motor |
Oct. 6, 1998 |
| 5816079 |
Needle position detecting system for a circular knitting machine |
Oct. 6, 1998 |
| 5777694 |
Color wheel with plastic film filters |
Jul. 7, 1998 |
| 5672865 |
Timing device for controlling machinery and other servomechanical devices and method of manufacture therefor |
Sep. 30, 1997 |
| 5557450 |
Optical rotation encoder for X-Y direction input device |
Sep. 17, 1996 |
| 5408311 |
Method for measuring a refracting power of an optical system and its apparatus |
Apr. 18, 1995 |
| 5315428 |
Optical scanning system comprising optical chopper |
May. 24, 1994 |
| 5255117 |
Advanced eye or sensor protection and high speed variable optical attenuation system |
Oct. 19, 1993 |
| 5245190 |
Imaging arrangement |
Sep. 14, 1993 |
| 5198939 |
Apparatus for positioning apertures of a disk assembly |
Mar. 30, 1993 |
| 5107530 |
X-ray diffractometer with shutter control |
Apr. 21, 1992 |
| 5055673 |
Radiation chopper having a chopper disk driven by an electromotor |
Oct. 8, 1991 |
| 5054913 |
Method and apparatus for measuring the velocity of a fluid using analysis of Young's fringes in speckle photography |
Oct. 8, 1991 |
| 5032023 |
Optical fiber based sensor for a variable depth range camera |
Jul. 16, 1991 |
| 5015056 |
Photointerruptor for use in light-transmission type rotary encoder |
May. 14, 1991 |
| 4999491 |
Optical seeker with rosette scanning |
Mar. 12, 1991 |
| 4999572 |
Redundant pulse monitoring in electric energy metering system |
Mar. 12, 1991 |
| 4987842 |
Detector for use on sewing machine |
Jan. 29, 1991 |
| 4988193 |
Method and apparatus for measuring incident light angle relative to level |
Jan. 29, 1991 |
| 4965447 |
Chopper for staring infrared systems |
Oct. 23, 1990 |
| 4959599 |
Head positioner |
Sep. 25, 1990 |
| 4938589 |
Sensor with integrated signal processing for one- to three-dimensional positioning |
Jul. 3, 1990 |
| 4930887 |
Apparatus and method for aligning ring resonator |
Jun. 5, 1990 |
| 4920905 |
Detector for use on sewing machines |
May. 1, 1990 |
| 4909600 |
Light chopper assembly |
Mar. 20, 1990 |
| 4873433 |
Electromagnetic radiation detecting device with hollow semicylindrical chopper |
Oct. 10, 1989 |
| 4848867 |
Rotary joint for polarization plane maintaining optical fibers |
Jul. 18, 1989 |
| 4814602 |
Photoelectric conversion processing apparatus |
Mar. 21, 1989 |
| 4731638 |
Timing pulse generator for an electrophotographic printing machine |
Mar. 15, 1988 |
| 4716289 |
Obturator disc for an optical transducer |
Dec. 29, 1987 |
| 4700482 |
Self-supporting graduation carrier |
Oct. 20, 1987 |
| 4684857 |
Optical excitation electromagnetic motor |
Aug. 4, 1987 |
| 4673808 |
Disc for rotary encoder and method for producing same |
Jun. 16, 1987 |
| 4661697 |
Optically reflecting code plate |
Apr. 28, 1987 |
| 4652747 |
Shaft encoder having a concave reflective element with two regions of different reflectivity for light within two different wavelength bands |
Mar. 24, 1987 |
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