Rapid and highly integrated FPGA-based Shack-Hartmann wavefront sensor for adaptive optics system

Yi Pin Chen, Chia Yuan Chang, Shean-Jen Chen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this study, a field programmable gate array (FPGA)-based Shack-Hartmann wavefront sensor (SHWS) programmed on LabVIEW can be highly integrated into customized applications such as adaptive optics system (AOS) for performing real-time wavefront measurement. Further, a Camera Link frame grabber embedded with FPGA is adopted to enhance the sensor speed reacting to variation considering its advantage of the highest data transmission bandwidth. Instead of waiting for a frame image to be captured by the FPGA, the Shack-Hartmann algorithm are implemented in parallel processing blocks design and let the image data transmission synchronize with the wavefront reconstruction. On the other hand, we design a mechanism to control the deformable mirror in the same FPGA and verify the Shack-Hartmann sensor speed by controlling the frequency of the deformable mirror dynamic surface deformation. Currently, this FPGAbead SHWS design can achieve a 266 Hz cyclic speed limited by the camera frame rate as well as leaves 40% logic slices for additionally flexible design.

Original languageEnglish
Title of host publicationAdaptive Optics and Wavefront Control for Biological Systems IV
EditorsJoel Kubby, Sylvain Gigan, Thomas G. Bifano
PublisherSPIE
ISBN (Electronic)9781510614895
DOIs
StatePublished - 1 Jan 2018
EventAdaptive Optics and Wavefront Control for Biological Systems IV 2018 - San Francisco, United States
Duration: 27 Jan 201829 Jan 2018

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume10502
ISSN (Print)1605-7422

Conference

ConferenceAdaptive Optics and Wavefront Control for Biological Systems IV 2018
CountryUnited States
CitySan Francisco
Period27/01/1829/01/18

Keywords

  • adaptive optics
  • Camera Link interface
  • FPGA
  • Shack-Hartmann wavefront sensor

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