Optical scan pattern generating arrangement for a laser scanner
US4861973A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1987 |
| Grant date | Aug 29, 1989 |
| Priority date | — |
| Expiry date | Jun 18, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/10
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An optical arrangement in a laser scanner for generating a cross bar X laser light beam scan pattern includes a multi-faceted or -mirrored optical device mounted for rotation about a vertical axis. The device has four primary mirrors oriented ninety degrees from one to the next about the vertical axis. The primary mirrors are tilted about respective horizontal axes relative to the vertical axis and adapted to receive and reflect a laser light beam as each primary mirror moves successively through a portion of each rotational cycle of the optical device. The optical arrangement also includes a multiplicity of secondary mirrors disposed in stationary positions relative to one another and to each of the primary mirrors as they move successively through the rotational cycle portion. The secondary mirrors are adapted to receive the laser light beam reflected from the primary mirrors and to reflect the same to trace scan lines of the laser light beam scan pattern at different orientations with respect to one another as the primary mirrors move successively through the portion of each rotational cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.