Color television camera optical system
US3940788A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1973 |
| Grant date | Feb 24, 1976 |
| Priority date | — |
| Expiry date | Dec 6, 1993 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B3/0031
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical system in a single or double tube color television camera for minimizing color shading, moire patterns and color beats includes along the image optical axis a phase grating low pass filter, a color encoding filter and a lenticular lens member oriented relative to each other and the image scanning to minimize interference between the color encoding filter and striped patterns in the viewed object. The color encoding filter is striped, the low pass filter is either striped or has regularly longitudinally and transversely spaced phase retarding projections and the lenticular lens member includes transversely spaced longitudinal cylindrical lenses or regularly transversely and longitudinally spaced convex projections.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.