Anti-aliasing low-pass blur filter for reducing artifacts in imaging apparatus
US6937283B1 · kind B1 · utility
5Cited by
22References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1996 |
| Grant date | Aug 30, 2005 |
| Priority date | — |
| Expiry date | Dec 3, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/195
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An imaging apparatus (50) for generating an image signal from incident light with higher spatial frequencies of the incident light limited to reduce undersampling artifacts. Apparatus (50) includes a detector plane (62) for generating the image signal from an array of photosites, (63) and an optical section having a relatively thin lithium niobate rhomboidal filter (51) interposed in the path of the incident light so as to produce a blurred image on the photosites. A filter configuration is disclosed which produces four spots (58) at the imaging sensors (62) positioned at the corners of a rhombus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.