Image translation devices
US4117331A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 2, 1977 |
| Grant date | Sep 26, 1978 |
| Priority date | — |
| Expiry date | May 2, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N3/09
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A portable device providing visual images of infra-red sources by means of I.R. detectors/electric signals/light emitting diodes. Scanning is employed to reduce the numbers of I.R. detector elements and L.E.D.'s, the scanning being effected by a rotating polygon having mirror facets tilted at slightly different angles to scan the object and image fields simultaneously in strips which cover the respective fields in a cycle. One aspect of the invention consists in tilting the I.R. and visual facets oppositely to transfer a low I.R. strip position to a correspondingly high visual strip position and vice versa. A second aspect consists in using a polygon with 45.degree. facets and I.R. detectors and L.E.D.'s on optical paths parallel to the axis of rotation. The scanned strips are then symmetrical about their field center lines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.