Phase-Locked Interferometry

Glen W. Johnson; Dennis C. Leiner; Duncan T. Moore

doi:10.1117/12.955904

21 November 1977 Phase-Locked Interferometry

Glen W. Johnson, Dennis C. Leiner, Duncan T. Moore

Proceedings Volume 0126, Clever Optics: Innovative Applications of Optics; (1977) https://doi.org/10.1117/12.955904
Event: 21st Annual Technical Symposium, 1977, San Diego, United States

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.

Citation Download Citation

Glen W. Johnson, Dennis C. Leiner, and Duncan T. Moore "Phase-Locked Interferometry", Proc. SPIE 0126, Clever Optics: Innovative Applications of Optics, (21 November 1977); https://doi.org/10.1117/12.955904

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