Image enhancement system and method for night goggles
US7170057B2 · kind B2 · utility
15Cited by
10References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 29, 2001 |
| Grant date | Jan 30, 2007 |
| Priority date | — |
| Expiry date | Feb 9, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B23/125
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A dichroic type narrow-band-pass filter is used as a beamsplitter inside a night vision goggle eyepiece. The filter is combined with appropriately aligned polarizers and liquid crystal type shutter rotators movable between a “P” orientation and an “S” orientation to transmit center band and side band wavelengths of the normal view or night scene for recording, transmitting or enhancing. In the enhanced low light level mode, the intensified visible image presented to the user comprises a 40 degree circular image with a 30 degree by 22.5 degree rectangular display insert.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.