Generalized method for sorting Shack-Hartmann spot patterns using local similarity

Journal Article · Mon Sep 01 00:00:00 EDT 2008 · Applied Optics

DOI:https://doi.org/10.1364/AO.47.004548· OSTI ID:21120929

Smith, Daniel G; Greivenkamp, John E

The sensitivity and dynamic range of a Shack-Hartmann wavefront sensor is enhanced when the spots produced by the lenslet array are allowed to shift more than one lenslet radius from their on-axis positions. However, this presents the problem of accurately and robustly associating the spots with their respective subapertures. This paper describes a method for sorting spots that takes advantage of the local spot position distortions to unwrap the spot pattern. The described algorithm is both simple and robust and also applicable to any lenslet array geometry that can be described as a two-dimensional lattice, including hexagonal arrays, which are shown here to be more efficient than square arrays.

• OSTI ID: 21120929
• Journal Information: Applied Optics, Vol. 47, Issue 25; Other Information: DOI: 10.1364/AO.47.004548; (c) 2008 Optical Society of America; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6935
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALGORITHMS
DESIGN
GEOMETRY
OPTICAL SYSTEMS
OPTICS
SENSITIVITY
SENSORS
TESTING
TWO-DIMENSIONAL CALCULATIONS