Optical beam scanning apparatus
US5295004A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1992 |
| Grant date | Mar 15, 1994 |
| Priority date | — |
| Expiry date | Nov 6, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/106
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical beam scanning apparatus includes one rotatable hologram which is rotatable about an axis, and at least two laser beam sources which emit laser beams. The rotatable hologram is provided with at least two hologram areas whose number corresponds to the number of the laser beam sources, so that the laser beams emitted from the respective laser beam sources are made incident upon the respective hologram areas. Each of the hologram areas is provided with a plurality of hologram facets which are concentrically arranged with respect to the axis of rotation of the rotatable hologram to emit laser beams of the same F number. The hologram areas having different numbers of hologram facets having different F numbers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.