Imaging apparatus
US4763192A · kind A · utility
6Cited by
7References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1986 |
| Grant date | Aug 9, 1988 |
| Priority date | — |
| Expiry date | Aug 19, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N3/09
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A twin polygon thermal imager is provided with a compensator for compensating for horizontal distortion in the image produced on a CRT. The distortion compensator applies an amount of correction which is determined, in each horizontal line, to compensate for the particular magnitude of the distortion in that line. The amount of correction needed is determined as a function of the angle between the rotational axis of the polygons and the particular facets thereof producing the particular video line. Compensation is achieved by adjusting the timing and the frequency at which digital video data is read-out from a signal store.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.