Large-dynamic-range Shack-Hartmann wavefront sensor for highly aberrated eyes

Geunyoung Yoon, Seth Pantanelli, Lana J. Nagy

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

Abstract

A conventional Shack-Hartmann wavefront sensor has a limitation that increasing the dynamic range usually requires sacrificing measurement sensitivity. The prototype large-dynamic-range Shack-Hartmann wavefront sensor presented resolves this problem by using a translatable plate with subapertures placed in conjugate with the lenslet array. Each subaperture is the same size as a lenslet and they are arranged so that they overlap every other lenslet position. Three translations of the plate are required to acquire four images to complete one measurement. This method increases the dynamic range by a factor of two with no subsequent change in measurement sensitivity and sampling resolution of the aberration. The feasibility of the sensor was demonstrated by measuring the higher order aberrations of a custom-made phase plate and human eyes with and without the plate.

Original languageEnglish (US)
Article number030502
JournalJournal of Biomedical Optics
Volume11
Issue number3
DOIs
StatePublished - May 2006

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Biomedical Engineering

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