Optical scanner
US4538181A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 6, 1984 |
| Grant date | Aug 27, 1985 |
| Priority date | — |
| Expiry date | Apr 6, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N3/09
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical scanner for orthogonal scanning in read and/or write modes has a framing mirror (20) for linear vertical scanning and a rotating disc (30) with a circular array of concave reflectors (32) for horizontal scanning. Primary imagers (24, 164) focus the linear vertical scan onto a strip mirror (26) which reflects the scanned pixels to the concave reflectors. Preferably, the concave reflectors reflect the pixel image in a collimated beam which is focused by a collection optic (38, 200) onto radiation detector (40). Image rotator (221), collection aperture defining device (270, 272), aperture shading device (290), and a device for suppressing spurious radiation are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.