Method and objective lens for spectrally modifying light for an electronic camera
US7006141B1 · kind B1 · utility
8Cited by
16References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 23, 1999 |
| Grant date | Feb 28, 2006 |
| Priority date | — |
| Expiry date | Nov 23, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/285
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method for modifying the spectrum of light rays passing through an objective lens to an electronic camera that includes providing an interference type filter within the objective lens. The interference type filter may be a coating on a separate optical element added to the objective lens or on a normal optical component of the objective lens. The interference filter coating is located along the optical axis where the light rays are substantially collimated and have a minimum light ray incidence angle with respect to the coating surface, which angle should not exceed 15 degrees for any of the light rays passing therethrough.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.