Share Email Print
cover

Proceedings Paper

Application of a liquid crystal lens to a double-focusing common-path interferometer
Author(s): Toshiaki Nose; Shin Masuda; Susumu Sato
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Uniaxial crystal properties can easily be obtained by using a nematic liquid crystal (LC) with suitable substrate treatment.A liquid crystal lens, which has bifocal properties, is fabricated wit a concave lens and a pane substrate to attain a convex lens shape LC layer, and is used as the key component of the double focusing interferometer. Liquid crystal materials are selected for the refractive index matching between the plano-concave lens and no value of the LC material. In this case, an incident ordinary ray as a test beam passes just through the lens without focusing. On the other hand, an extraordinary ray as a reference beam is focusing on the test piece with the same general path, and the common path configuration can easily be achieved. Basic properties as a novel optical test system using the LC lens are demonstrated, and it is confirmed that a thickness of an Al evaporated film can successfully be measured by introducing phase shifting technique.

Paper Details

Date Published: 30 October 1997
PDF: 6 pages
Proc. SPIE 3143, Liquid Crystals, (30 October 1997); doi: 10.1117/12.279265
Show Author Affiliations
Toshiaki Nose, Akita Univ. (Japan)
Shin Masuda, Advantest Labs., Ltd. (Japan)
Susumu Sato, Akita Univ. (Japan)


Published in SPIE Proceedings Vol. 3143:
Liquid Crystals
Iam-Choon Khoo, Editor(s)

© SPIE. Terms of Use
Back to Top