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Class Information
Number: 250/227.21
Name: Radiant energy > Photocells; circuits and apparatus > Optical or pre-photocell system > Light conductor > With light chopping or modulation
Description: Subject matter wherein means are provided for varying the intensity of the light transmitted to the photocell from substantially zero to substantially maximum intensity as a function of time.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7453058 |
Optical bumps for low-loss interconnection between a device and its supported substrate and related methods |
Nov. 18, 2008 |
| 7196320 |
Fiber optic encoder for position sensing |
Mar. 27, 2007 |
| 7170606 |
Multi-way LED-based surface reflectance sensor and spectrophotometer |
Jan. 30, 2007 |
| 7084616 |
Method and device for measuring an electrical voltage |
Aug. 1, 2006 |
| 7036379 |
Fluid diffusion resistant glass-encased optical sensor |
May. 2, 2006 |
| 7015458 |
High density fiber optic output interface and system |
Mar. 21, 2006 |
| 6984819 |
Optical converting type ultrasonic receiving apparatus |
Jan. 10, 2006 |
| 6954580 |
Optical receiver with high dynamic range |
Oct. 11, 2005 |
| 6921894 |
Fiber optic micro accelerometer |
Jul. 26, 2005 |
| 6899849 |
Integrated sensor |
May. 31, 2005 |
| 6877378 |
Fluid diffusion resistant glass-encased optical sensor |
Apr. 12, 2005 |
| 6766072 |
Optical threshold and comparison devices and methods |
Jul. 20, 2004 |
| 6750967 |
Light scattering measuring probe |
Jun. 15, 2004 |
| 6748128 |
Device for changing the length of the running path of an electromagnetic wave |
Jun. 8, 2004 |
| 6744036 |
Optically coupled sensor for application to combustible liquids |
Jun. 1, 2004 |
| 6738173 |
Limiting amplifier modulator driver |
May. 18, 2004 |
| 6730920 |
Abbe arm calibration system for use in lithographic apparatus |
May. 4, 2004 |
| 6724786 |
Variable optical attenuator using wavelength locked loop tuning |
Apr. 20, 2004 |
| 6680472 |
Device for measuring of optical wavelengths |
Jan. 20, 2004 |
| 6626043 |
Fluid diffusion resistant glass-encased fiber optic sensor |
Sep. 30, 2003 |
| 6559999 |
System for modulating radiation using two rotating discs |
May. 6, 2003 |
| 6556149 |
Switches and joysticks using a non-electrical deformable pressure sensor |
Apr. 29, 2003 |
| 6545259 |
Optical wavelength monitor for a passive optical component |
Apr. 8, 2003 |
| 6411909 |
Device for measuring the fluid consumption of a user over a given time |
Jun. 25, 2002 |
| 6376831 |
Neural network system for estimating conditions on submerged surfaces of seawater vessels |
Apr. 23, 2002 |
| 6307666 |
Voltage sensing systems and methods for passive compensation of temperature related intrinsic phase shift |
Oct. 23, 2001 |
| 6262415 |
Orientation sensor system with high precision optical interrogation and dense multiplexing |
Jul. 17, 2001 |
| 6246048 |
Methods and apparatus for mechanically enhancing the sensitivity of longitudinally loaded fiber optic sensors |
Jun. 12, 2001 |
| 6243006 |
Safety device for motor-operated systems |
Jun. 5, 2001 |
| 6066844 |
Optical receiver with integrated variable attenuator |
May. 23, 2000 |
| 5933001 |
Method for using a wideband, high linear dynamic range sensor |
Aug. 3, 1999 |
| 5780846 |
Device in pen form with means for measuring a length |
Jul. 14, 1998 |
| 5780847 |
Verdet constant temperature-compensated current sensor |
Jul. 14, 1998 |
| 5747348 |
Diode laser interrogated fiber optic hydrazine-fuel sensor |
May. 5, 1998 |
| 5719497 |
Lensless Magneto-optic speed sensor |
Feb. 17, 1998 |
| 5699461 |
Optical fiber sensors and method for making the same |
Dec. 16, 1997 |
| 5693935 |
Method and device for continuous pattern sensing using fiber optics |
Dec. 2, 1997 |
| 5684298 |
Photonic-based sensing apparatus using displacement tracking of an optical beam in a semiconductor |
Nov. 4, 1997 |
| 5674751 |
Diode laser interrogated fiber optic hydrazine-fuel sensor system and method |
Oct. 7, 1997 |
| 5650612 |
Optical sensor using swept wavelength light source |
Jul. 22, 1997 |
| 5626804 |
Roller position controller for a continuous belt press |
May. 6, 1997 |
| 5619046 |
Method of manufacturing a measuring device |
Apr. 8, 1997 |
| 5602946 |
Fiber optic sensor system for detecting movement or position of a rotating wheel bearing |
Feb. 11, 1997 |
| 5602339 |
Injection molding machine pressure transducer with trapezoidal cavity |
Feb. 11, 1997 |
| 5567622 |
Sensor for detection of nitrogen dioxide and nitrogen tetroxide |
Oct. 22, 1996 |
| 5557265 |
Method and system for indicating an optical transmit amplifier fault |
Sep. 17, 1996 |
| 5541405 |
Method and device for continuous pattern sensing using fiber optics |
Jul. 30, 1996 |
| 5539201 |
Multiple channel driver for fiber optic coupled sensors and switches |
Jul. 23, 1996 |
| 5535293 |
High-speed electro-optical modulator, chopper, and multiplexer/demultiplexer |
Jul. 9, 1996 |
| 5521749 |
Optical modulation apparatus |
May. 28, 1996 |
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