Real-time optical filtering system with spatial and temporal enhancement of visual information
US4453804A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 6, 1982 |
| Grant date | Jun 12, 1984 |
| Priority date | — |
| Expiry date | Jan 6, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/46
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a system of real-time coherent optical filtering of visual imagery which encompasses a laser and a set of lenses for transmitting a visual target image of an input, a Fabry-Perot interferometer for filtering the target image to produce a filtered target image at an output having a predetermined bandwidth of spatial frequency information, the improvements relate to transmitting and original unfiltered image to the output for overlaying the filtered image for spatial enhancement of the predetermined spatial frequency bandwidth of information in the filtered image, and flickering the filtered image to achieve temporal enhancement of the visual information in the spatial frequency bandwidth of interest.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.