Photodetector filter structure
US3976875A · kind A · utility
17Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1975 |
| Grant date | Aug 24, 1976 |
| Priority date | — |
| Expiry date | Jun 24, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J1/0488
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A transparent dome formed from a segment of a spherical shell of uniform thickness has an optical filter on its surface. A photodetector is positioned on the concave side of the dome so that light rays passing through the dome, normal to its surface, will fall on the center of the photodetector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.