Luminous flux separating optical system
US5327289A · kind A · utility
16Cited by
3References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 14, 1991 |
| Grant date | Jul 5, 1994 |
| Priority date | — |
| Expiry date | Nov 14, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A color separation prism system for use in a TV camera which can separate R, G and B colors. The color separation prism system of the invention includes one or more air gaps each of which is formed between the prisms in a wedge shape that is open on the converging side of a luminous flux passing through the air gap. The use of the wedge-shaped air gap can reduce the possibility of generation of an astigmatism to thereby prevent deterioration of the performance of an optical system formed of the above-mentioned color separation prisms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.