Scanning beam optical signal processor
US5002348A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 24, 1989 |
| Grant date | Mar 26, 1991 |
| Priority date | — |
| Expiry date | May 24, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/10
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a scanning beam optical processing system which combines Fourier optics with the ability to scan a stationary object plane. A scanning system moves a beam of light over a stationary medium and directs the light to a beam deflector. A descanning position control system re-establishes the beam deflected from the beam deflector along a stationary optical path for optical processing of information obtained from the medium. Hyperbolic lenses are used in the scanning system. The descanning position control system includes a controller comprising a detector for sensing a portion of the beam deflected from the beam deflector and for generating a signal representative of the position thereof and a differential amplifier for comparing the signal representative of the position of the deflected beam of light with a signal representative of the predetermined fixed reference axis for generating a beam deflector drive signal in response thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.