Adaptive optics for ophthalmic imaging

Luis Diaz-Santana; Paul Gasson; Ian Munro; Chris Dainty

doi:10.1109/CLEOE.2003.1313793

Adaptive optics for ophthalmic imaging

Luis Diaz-Santana
, Paul Gasson
, Ian Munro
, Chris Dainty

Physics

City University London
Imperial College London

Research output: Chapter in Book or Conference Publication/Proceeding › Conference Publication › peer-review

Abstract

In this report we present an adaptive optics system with a closed-loop bandwidth between 12 Hz and 25 Hz. This system scans the wavefront sensing beam at 1 kHz over a maximum angle of 1 degree and de-scans it on the exit path to eliminate speckle, as previously done by Hofer et.al to study the dynamics of ocular aberrations without correction. This has improved the signal to noise ratio in the wavefront sensor signal, hence ensuring a reduction of ocular aberrations in all of the subjects tested. The system uses a Shack-Hartmann wavefront sensor and a DALSA CCD camera. MTF was reconstructed from the images using a Wiener de-convolution algorithm assuming a quasidiffraction limited first pass, followed by a discrete Fourier transform.

Original language	English
Title of host publication	2003 Conference on Lasers and Electro-Optics Europe, CLEO/EUROPE 2003
Pages	723
Number of pages	1
DOIs	https://doi.org/10.1109/CLEOE.2003.1313793
Publication status	Published - 2003
Event	2003 Conference on Lasers and Electro-Optics Europe, CLEO/EUROPE 2003 - Munich, Germany Duration: 22 Jun 2003 → 27 Jun 2003

Publication series

Name	Conference on Lasers and Electro-Optics Europe - Technical Digest

Conference

Conference	2003 Conference on Lasers and Electro-Optics Europe, CLEO/EUROPE 2003
Country/Territory	Germany
City	Munich
Period	22/06/03 → 27/06/03

Access to Document

10.1109/CLEOE.2003.1313793

Cite this

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title = "Adaptive optics for ophthalmic imaging",

abstract = "In this report we present an adaptive optics system with a closed-loop bandwidth between 12 Hz and 25 Hz. This system scans the wavefront sensing beam at 1 kHz over a maximum angle of 1 degree and de-scans it on the exit path to eliminate speckle, as previously done by Hofer et.al to study the dynamics of ocular aberrations without correction. This has improved the signal to noise ratio in the wavefront sensor signal, hence ensuring a reduction of ocular aberrations in all of the subjects tested. The system uses a Shack-Hartmann wavefront sensor and a DALSA CCD camera. MTF was reconstructed from the images using a Wiener de-convolution algorithm assuming a quasidiffraction limited first pass, followed by a discrete Fourier transform.",

author = "Luis Diaz-Santana and Paul Gasson and Ian Munro and Chris Dainty",

year = "2003",

doi = "10.1109/CLEOE.2003.1313793",

language = "English",

isbn = "0780377346",

series = "Conference on Lasers and Electro-Optics Europe - Technical Digest",

pages = "723",

booktitle = "2003 Conference on Lasers and Electro-Optics Europe, CLEO/EUROPE 2003",

note = "2003 Conference on Lasers and Electro-Optics Europe, CLEO/EUROPE 2003 ; Conference date: 22-06-2003 Through 27-06-2003",

}

Diaz-Santana, L, Gasson, P, Munro, I & Dainty, C 2003, Adaptive optics for ophthalmic imaging. in 2003 Conference on Lasers and Electro-Optics Europe, CLEO/EUROPE 2003., 1313793, Conference on Lasers and Electro-Optics Europe - Technical Digest, pp. 723, 2003 Conference on Lasers and Electro-Optics Europe, CLEO/EUROPE 2003, Munich, Germany, 22/06/03. https://doi.org/10.1109/CLEOE.2003.1313793

TY - GEN

T1 - Adaptive optics for ophthalmic imaging

AU - Diaz-Santana, Luis

AU - Gasson, Paul

AU - Munro, Ian

AU - Dainty, Chris

PY - 2003

Y1 - 2003

N2 - In this report we present an adaptive optics system with a closed-loop bandwidth between 12 Hz and 25 Hz. This system scans the wavefront sensing beam at 1 kHz over a maximum angle of 1 degree and de-scans it on the exit path to eliminate speckle, as previously done by Hofer et.al to study the dynamics of ocular aberrations without correction. This has improved the signal to noise ratio in the wavefront sensor signal, hence ensuring a reduction of ocular aberrations in all of the subjects tested. The system uses a Shack-Hartmann wavefront sensor and a DALSA CCD camera. MTF was reconstructed from the images using a Wiener de-convolution algorithm assuming a quasidiffraction limited first pass, followed by a discrete Fourier transform.

AB - In this report we present an adaptive optics system with a closed-loop bandwidth between 12 Hz and 25 Hz. This system scans the wavefront sensing beam at 1 kHz over a maximum angle of 1 degree and de-scans it on the exit path to eliminate speckle, as previously done by Hofer et.al to study the dynamics of ocular aberrations without correction. This has improved the signal to noise ratio in the wavefront sensor signal, hence ensuring a reduction of ocular aberrations in all of the subjects tested. The system uses a Shack-Hartmann wavefront sensor and a DALSA CCD camera. MTF was reconstructed from the images using a Wiener de-convolution algorithm assuming a quasidiffraction limited first pass, followed by a discrete Fourier transform.

UR - https://www.scopus.com/pages/publications/84891844330

U2 - 10.1109/CLEOE.2003.1313793

DO - 10.1109/CLEOE.2003.1313793

M3 - Conference Publication

AN - SCOPUS:84891844330

SN - 0780377346

SN - 9780780377349

T3 - Conference on Lasers and Electro-Optics Europe - Technical Digest

SP - 723

BT - 2003 Conference on Lasers and Electro-Optics Europe, CLEO/EUROPE 2003

T2 - 2003 Conference on Lasers and Electro-Optics Europe, CLEO/EUROPE 2003

Y2 - 22 June 2003 through 27 June 2003

ER -

Adaptive optics for ophthalmic imaging

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