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Class Information
Number: 250/229
Name: Radiant energy > Photocells; circuits and apparatus > Optical or pre-photocell system > Light valve (e.g., iris diaphragm)
Description: Subject matter having means in the optical path between light source and photocell for varying the amount of light which reaches the photocell.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7446677 |
Method and apparatus for optically detecting selections made on an input device |
Nov. 4, 2008 |
| 7427745 |
Optical shutter for miniature cameras |
Sep. 23, 2008 |
| 7342210 |
Remote control for auto-darkening lens systems and method |
Mar. 11, 2008 |
| 7266261 |
Fiber optics differential pressure transducer |
Sep. 4, 2007 |
| 7262888 |
Optical scanner apparatus with pinhole imaging device |
Aug. 28, 2007 |
| 7214927 |
Method and apparatus using liquid crystal light valve to filter incident light on a photodetector |
May. 8, 2007 |
| 7132643 |
Optical transducer having optical modulator in the vicinity of rotational axis of moving object and musical instrument using the same |
Nov. 7, 2006 |
| 7045768 |
Displacement/quantity of light converter |
May. 16, 2006 |
| 7042371 |
Optical keyboard with geodesic optical elements |
May. 9, 2006 |
| 7019667 |
System and method for accurate reading of rotating disk |
Mar. 28, 2006 |
| 6989526 |
Device for the optoelectronic detection of switching positions of a switching element |
Jan. 24, 2006 |
| 6960008 |
Proportional brake light display system |
Nov. 1, 2005 |
| 6946980 |
Input device |
Sep. 20, 2005 |
| 6872933 |
Optical transducer |
Mar. 29, 2005 |
| 6870151 |
Shutter, optical sensor system using the same and shutter holder incorporated therein |
Mar. 22, 2005 |
| 6856473 |
Method of fabricating optical aperture and method of fabricating probe for near field light device |
Feb. 15, 2005 |
| 6809661 |
Keypad device |
Oct. 26, 2004 |
| 6800839 |
Device for the optoelectronic detection of switching positions of a switching element |
Oct. 5, 2004 |
| 6801875 |
Methods, systems, and software for performing measurements |
Oct. 5, 2004 |
| 6784807 |
System and method for accurate reading of rotating disk |
Aug. 31, 2004 |
| 6777666 |
Position sensor utilizing light emissions from a lateral surface of a light-emitting structure and two light collectors |
Aug. 17, 2004 |
| 6768091 |
Optical pick-up device with a light amount detecting device |
Jul. 27, 2004 |
| 6747402 |
EL element lighting unit employing the same EL element |
Jun. 8, 2004 |
| 6713751 |
Easily assembled optical fiber sensor and musical instrument using the same |
Mar. 30, 2004 |
| 6710322 |
Device for detecting the position of a selector lever |
Mar. 23, 2004 |
| 6661020 |
Servo-shutter mechanism for detecting defects in cans |
Dec. 9, 2003 |
| 6617590 |
Image reading apparatus |
Sep. 9, 2003 |
| 6548807 |
Radiation receiver with active optical protection system |
Apr. 15, 2003 |
| 6531691 |
Method and system for optically testing a detector |
Mar. 11, 2003 |
| 6444976 |
System and method for reflecting and deflecting light utilizing spherical shaped devices |
Sep. 3, 2002 |
| 6433330 |
Sun optical limitation illumination detector (SOLID) |
Aug. 13, 2002 |
| RE37777 |
Switch apparatus requiring the hand of the operator to activate the switch by breaking a light beam |
Jul. 2, 2002 |
| 6307465 |
Input device |
Oct. 23, 2001 |
| 6268599 |
Optical sensor switch system for a scanner |
Jul. 31, 2001 |
| 6259364 |
Horn switch and ancillary device switches for vehicles |
Jul. 10, 2001 |
| 6246049 |
Optical transducer |
Jun. 12, 2001 |
| 6218658 |
Optical fuse |
Apr. 17, 2001 |
| 6188193 |
Light valve shutter control system with zero-light position control |
Feb. 13, 2001 |
| 6157026 |
Optical switch of the multiple push button type for producing a plurality of control signals |
Dec. 5, 2000 |
| 6150651 |
Photointerrupter driving circuit capable of decreasing the number of parts |
Nov. 21, 2000 |
| 6114690 |
Light-controlled safety switch for a punch press |
Sep. 5, 2000 |
| 6091066 |
Contamination-tolerant switch structure |
Jul. 18, 2000 |
| 6075239 |
Article comprising a light-actuated micromechanical photonic switch |
Jun. 13, 2000 |
| 6072328 |
IC devices with a built-in circuit for protecting internal information |
Jun. 6, 2000 |
| 6060672 |
Push button structure |
May. 9, 2000 |
| 6057554 |
Reflective switch |
May. 2, 2000 |
| 6051842 |
Illumination optical apparatus with optical integrator |
Apr. 18, 2000 |
| 6015970 |
Switch assembly incorporating optical control function |
Jan. 18, 2000 |
| 5981939 |
Device for sensing sudden stop of machine |
Nov. 9, 1999 |
| 5977878 |
Control switch apparatus operable by an object placed adjacent thereto and spaced therefrom |
Nov. 2, 1999 |
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