Optical centroid processor wavefront sensor
US5083015A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 1990 |
| Grant date | Jan 21, 1992 |
| Priority date | — |
| Expiry date | Nov 16, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J9/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improved optical centroid processor wavefront sensor is described in which an image is optically impinged on a plurality of mask arrays. A group of mask arrays, having a coarse dependant function, filters light onto corresponding photodetector arrays. The output of the photodetectors provide a coarse signal indicative of spot displacement over an increased tilt dynamic range. Another group of mask arrays, having a fine dependant function, filters light onto corresponding photodetector arrays. The output of the photodetectors provide a fine signal indicative of spot displacement with an increased accuracy. The coarse and fine signals may be employed by a deformable mirror to correct aberrations in a light beam wavefront.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.