Holographic scanner utilizing auxiliary reflective surface
US3953105A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 16, 1974 |
| Grant date | Apr 27, 1976 |
| Priority date | — |
| Expiry date | Oct 16, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/106
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An apparatus which includes an optical spinner having a surface rotatable about an axis that is substantially perpendicular to the surface at its point of intersection with the axis. A source of coherent radiation is directed toward the surface and a zone-type lens covering at least a portion of the surface is configured to receive the radiation and direct it toward a first scanning focal point locus. An auxiliary reflective means is disposed in the path of the directed radiation, the reflective means being shaped to redirect the radiation toward a second scanning focal point locus, such that the principal ray of the radiation is substantially perpendicular to the axis. In this manner, the problems generally encountered with non-normal impinging light bundles are overcome.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.