Pupil-imaging wavefront gradient sensor

Nigel Pugh, Daniel R. Lobb, David D. Walker, Thomas L. Williams

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

6 Citations (Scopus)


A wavefront sensor design is presented. The wavefront sensor will be applied typically to adaptive correction of a ground based astronomical telescope. It comprises a pair of crossed biprisms to act as star image splitters in the telescope image plane, splitting the incident wave into four beams. The biprisms are followed by a lens which forms four pupil images. These exhibit intensity map differences related to the phase gradient of the incident wave, providing that the point spread function overlaps the biprism crossing. This allows standard wavefront reconstruction algorithms to be used to reconstruct the phase map over the aperture. The results from a computer diffraction simulation of this system are presented to show the useful range of the sensor. In addition, a design for an experimental prototype system is presented.

Original languageEnglish
Title of host publicationAdaptive Optical Systems and Applications
EditorsRobert K. Tyson, Robert Q. Fugate
Number of pages6
ISBN (Print)0819418935, 9780819418937
Publication statusPublished - 25 Aug 1995
Externally publishedYes
EventSPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation - San Diego, United States
Duration: 9 Jul 199514 Jul 1995

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceSPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation
Country/TerritoryUnited States
CitySan Diego


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