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Class Information
Number: 250/214P
Name: Radiant energy > Photocells; circuits and apparatus > Photocell controlled circuit > Special photocell or electron tube circuits > Photographic control
Description:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6710321 |
Display image quality measuring system |
Mar. 23, 2004 |
| 6642503 |
Time domain sensing technique and system architecture for image sensor |
Nov. 4, 2003 |
| 6567160 |
Light measuring apparatus and light measuring method |
May. 20, 2003 |
| 6529281 |
Position sensitive detectors and distance measuring apparatus using them |
Mar. 4, 2003 |
| 6414295 |
Image-sensing device and signal processing method in an image-sensing device |
Jul. 2, 2002 |
| 6180936 |
Photoreceptor arrangement for receiving light beams having coupling elements |
Jan. 30, 2001 |
| 6058270 |
Photometric device and camera having the photometric device |
May. 2, 2000 |
| 6029014 |
Light measuring apparatus and camera using the light measuring apparatus |
Feb. 22, 2000 |
| 5969338 |
Light-received position detecting circuit and distance detecting apparatus using the same |
Oct. 19, 1999 |
| 5838425 |
Exposure control for the photographic recording of a microscope image |
Nov. 17, 1998 |
| 5777728 |
Light meter |
Jul. 7, 1998 |
| 5705808 |
Flash tube devices with a controllable electrical energy |
Jan. 6, 1998 |
| 5705807 |
Photo detecting apparatus for detecting reflected light from an object and excluding an external light componet from the reflected light |
Jan. 6, 1998 |
| 5665960 |
Photoelectric converter device and method of manufacturing the same |
Sep. 9, 1997 |
| 5631458 |
Range finder |
May. 20, 1997 |
| 5581078 |
Ballistic optical camera trigger |
Dec. 3, 1996 |
| 5548398 |
Illuminant discriminator providing detection of high efficiency illumination |
Aug. 20, 1996 |
| 5541401 |
Arrangement for image generation and/or reading having pixel matrices of differing densities |
Jul. 30, 1996 |
| 5394063 |
Video light apparatus |
Feb. 28, 1995 |
| 5347563 |
Method for determining the function representing the effect of non-reciprocity of a radiographic film |
Sep. 13, 1994 |
| 5276320 |
Photometering device |
Jan. 4, 1994 |
| 5225884 |
Excimer laser pulse analyzer and method |
Jul. 6, 1993 |
| 5192968 |
Photometer |
Mar. 9, 1993 |
| 5184172 |
Method of and apparatus for automatically controlling exposure |
Feb. 2, 1993 |
| 4980545 |
Photometric circuit |
Dec. 25, 1990 |
| 4929824 |
light metering device with detector matrix and mean value detection |
May. 29, 1990 |
| 4849781 |
Range detector |
Jul. 18, 1989 |
| 4808811 |
Light integrating circuit for use in a light measuring device which is accurate for both low and high light values |
Feb. 28, 1989 |
| 4774401 |
Light measuring device variably controlled according to focus mode selection |
Sep. 27, 1988 |
| 4704024 |
Photometric circuit for camera |
Nov. 3, 1987 |
| 4701048 |
Input circuit for distance measuring apparatus |
Oct. 20, 1987 |
| 4699504 |
Control system for microimage recorders |
Oct. 13, 1987 |
| 4681441 |
Light measuring device |
Jul. 21, 1987 |
| RE32437 |
Light measuring device for flash photography |
Jun. 9, 1987 |
| 4657378 |
Color printing control system and method |
Apr. 14, 1987 |
| 4639134 |
Process and circuit arrangement for amplifying an input current |
Jan. 27, 1987 |
| 4610537 |
Photographic image information detecting device |
Sep. 9, 1986 |
| 4566115 |
X-Ray diagnostic system for radiographs |
Jan. 21, 1986 |
| 4561753 |
Selective photoresponsive sensing circuit |
Dec. 31, 1985 |
| 4556789 |
Measuring circuit for photo-receiving intensity of photosensor |
Dec. 3, 1985 |
| 4498753 |
Photometric apparatus for cameras |
Feb. 12, 1985 |
| 4492858 |
Photometric circuit having a plurality of photoelectric transducer elements capable of being selectively enabled for photometry |
Jan. 8, 1985 |
| 4479708 |
Temperature compensation system of light measuring circuit |
Oct. 30, 1984 |
| 4476383 |
Photometering device for obtaining exposure information |
Oct. 9, 1984 |
| 4473744 |
Photometric apparatus for camera |
Sep. 25, 1984 |
| 4473288 |
Photographic device with screen for controlling gradation of photographed image |
Sep. 25, 1984 |
| 4394570 |
Photoelectric conversion circuit |
Jul. 19, 1983 |
| 4390258 |
Photomeric circuit for camera |
Jun. 28, 1983 |
| 4373793 |
Light measuring device for flash photography |
Feb. 15, 1983 |
| 4364650 |
Exposure control method and device |
Dec. 21, 1982 |
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