Television camera optics with a light guide for camera adjustment
US4109279A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 10, 1977 |
| Grant date | Aug 22, 1978 |
| Priority date | — |
| Expiry date | Nov 10, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A television camera employing a dichroic mirror light-splitting system and a supplementary light arrangement for introducing an external light beam into the dichroic mirror when the camera is initially to be adjusted with respect to pattern registration, color balance and color temperature compensation. As the dichroic mirror is selectively receptive of the light beams from the television camera lens and the light arrangement, when the external light beam is allowed to enter the dichroic mirror, the resulting outputs of three color component image pick-up tubes are electrically processed according to a predetermined program to effect automatic adjustment of the TV-camera.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.