Radiation beam scanning apparatus and method employing distortion compensation
US5907153A · kind A · utility
6Cited by
4References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 2, 1997 |
| Grant date | May 25, 1999 |
| Priority date | — |
| Expiry date | Dec 2, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/046
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Radiation beam scanning apparatus comprises a rotatable reflector for causing an incident radiation beam to undergo a scanning movement; and a compensating device on to which the radiation beam impinges before reaching the rotating reflector. The compensating device modifies the optical path of circumferentially spaced portions of the beam upstream of the reflector, in phase with the rotation of the reflector, so as to compensate for distortions in the reflected beam introduced by the reflector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.