Serially addressed sub-pupil screen for in situ electro-optical sensor wavefront measurement
US8593622B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2012 |
| Grant date | Nov 26, 2013 |
| Priority date | — |
| Expiry date | Jun 22, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J9/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system and method for wavefront measurement of an EO sensor is performed in-situ using the sensor's EO detector in a manner that disambiguates the local wavefront measurements for different sub-pupils in time and maximizes the dynamic range for measuring the local wavefronts. A single sub-pupil sized optical beam is traced in a spatial pattern over the EO sensor's entrance pupil to serially illuminate a temporal sequence of sub-pupils to form a serially addressed sub-pupil screen. The EO detector and video card capture a video signal for one sub-pupil at a time as the optical beam traces the spatial pattern. The video signal is routed to a computer processor that generates a spatio-temporal mapping of the spatial positions of the sub-pupils in the sub-pupil screen to the temporal positions of frames in the video signal. The computer processor uses the mapping to process the video signal to compute a wavefront estimate spanning the entrance pupil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.