Light beam deflection means
US5877887A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1996 |
| Grant date | Mar 2, 1999 |
| Priority date | — |
| Expiry date | Dec 19, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0031
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light beam deflection unit for deflecting a light beam has a carrier seated in rotatable fashion around an optical axis, a reflector arranged at the rotatable carrier, and a reflection face oriented transversely relative to the optical axis. The carrier is connected to a sleeve that laterally surrounds the reflector at least in certain regions, and that rotates with the carrier. The sleeve has a light entry aperture for the incident light beam at an end face facing away from the reflector, and a light exit aperture for the deflected light beam in the generated surface. An achromatic lens that is displaceable in the direction of the optical axis for the purpose of focussing the light beam and that is held by the sleeve is located in the light entry aperture. A wedge-shaped, transparent insert is arranged in the light exit aperture for astigmatism correction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.