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Micron‐resolution ranging of cornea anterior chamber by optical reflectometry
Author(s) -
Huang David,
Wang Jyhpyng,
Lin Charles P.,
Puliafito Carmen A.,
Fujimoto James G.
Publication year - 1991
Publication title -
lasers in surgery and medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 112
eISSN - 1096-9101
pISSN - 0196-8092
DOI - 10.1002/lsm.1900110506
Subject(s) - reflectometry , optics , cornea , optical coherence tomography , materials science , resolution (logic) , coherence length , coherence (philosophical gambling strategy) , physics , time domain , superconductivity , quantum mechanics , artificial intelligence , computer science , computer vision
Noncontact, high resolution measurements of anterior eye structures using optical coherence domain reflectometry are described. Distances between intraocular structures are measured by directing a beam of short coherence length light onto the eye and performing an interferometric measurement on the optical group delay of reflected signals. Measurements of corneal thickness, corneal excision depth, and anterior chamber depth are demonstrated in vitro, and the location of tissue boundaries is resolved to within ± 2 μm. The full‐width‐half‐maximum longitudinal resolution is 10 μm. Sensitivities to reflected signals as small as 10 −10 of the incident power are achieved by heterodyne detection.