Photodetector automatic adaptive sensitivity system
US4554460A · kind A · utility
26Cited by
5References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 2, 1982 |
| Grant date | Nov 19, 1985 |
| Priority date | — |
| Expiry date | Jul 2, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/40
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A photodetector system for generating a series of digital value signals indicative of light intensity and particularly adapted for use in computer enhancement of photography and spectroradiometry. Circuitry is provided for controlling both the integration time of the light as well as the amplification factor applied to the analog signal generated. Logic control circuits are provided to adjust the integration time and amplifier gain to maintain the analog-to-digital converter within its optimal range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.