Integration of a photodiode array and centroid processing on a single CMOS chip for a real-time shack-hartmann wavefront sensor

Boon Hean Pui, Barrie Hayes-Gill, Matthew Clark, Michael Geoffrey Somekh, Chung Wah See, Steve Morgan, Alan Ng

Research output: Journal article publicationJournal articleAcademic researchpeer-review

10 Citations (Scopus)


A real-time VLSI optical centroid processor has been developed as part of a larger Shack-Hartmann wavefront sensor system for applications in adaptive optics. The implementation of the optical centroid detection system was demonstrated successfully using a hardware emulation system. Subsequently, the design has been implemented as a CMOS single-chip solution. This has advantages in terms of speed, power consumption, system size, and cost. The design of the different components of the system will be discussed along with test results of the fabricated device.
Original languageEnglish
Pages (from-to)787-794
Number of pages8
JournalIEEE Sensors Journal
Issue number6
Publication statusPublished - 1 Dec 2004
Externally publishedYes


  • Active pixel
  • Centroid detection
  • Field programmable gate array (FPGA)
  • Integrated detector
  • Photodiodes
  • Wavefront sensor

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering

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