Open AccessVery fast wave-front measurements at the human eye with a custom CMOS-based Hartmann�??Shack sensor
Author(s) -
Thomas Nirmaier,
G. Pudasaini,
Josef F. Bille
Publication year - 2003
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.11.002704
Subject(s) - optics , human eye , image sensor , cmos , cardinal point , bandwidth (computing) , wavefront , physics , software , charge coupled device , front and back ends , cmos sensor , computer science , optoelectronics , telecommunications , programming language , operating system
We describe what we believe to be the first wave-front measurements of the human eye at a sampling rate of 300 Hz with a custom Hartmann-Shack wave-front sensor that uses complementary metal-oxide semiconductor (CMOS) technology. This sensor has been developed to replace standard charge-coupled device (CCD) cameras and the slow software image processing that is normally used to reconstruct the wave front from the focal-plane image of a lenslet array. We describe the sensor's principle of operation and introduce the performance with static wave fronts. The system has been used to measure human-eye wave-front aberrations with a bandwidth of 300 Hz, which is approximately an order of magnitude faster than with standard software-based solutions. Finally, we discuss the measured data and consider further improvements to the system.