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Proceedings Paper

Phase-Locked Interferometry
Author(s): Glen W. Johnson; Dennis C. Leiner; Duncan T. Moore
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Paper Abstract

A technique is described which will convert in real time the irradiance pattern resulting from two interferometry beams into phase information. The interferometer is modified to introduce a known temporal phase modulation to one beam and then to detect minima in the A.C. signal. Three instruments built on this principle will be discussed. The instruments are capable of detecting phase differences approaching λ/100 and may be used for measuring optical interference (roughness, irregularity) or transparent plase objects such as biological samples, microballoons and gradient index materials.

Paper Details

Date Published: 21 November 1977
PDF: 9 pages
Proc. SPIE 0126, Clever Optics: Innovative Applications of Optics, (21 November 1977); doi: 10.1117/12.955904
Show Author Affiliations
Glen W. Johnson, University of Rochester (United States)
Dennis C. Leiner, University of Rochester (United States)
Duncan T. Moore, University of Rochester (United States)


Published in SPIE Proceedings Vol. 0126:
Clever Optics: Innovative Applications of Optics
N. Balasubramanian; James C. Wyant, Editor(s)

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