Abstract
An optical method for multiplication of moiré fringes is proposed to increase the sensitivity of moiré interferometry. The process involves two recording steps. In the first step, a traditional moiré interferometry setup is used. The moiré pattern containing carrier fringes and load fringes is recorded onto a glass-based holographic plate. The carrier frequency is much lower than that of the original specimen grating. The plate is then developed. In the second step, the holographic plate, regarded as a distorted specimen grating, is further examined by a similar moiré interferometry system. The frequency of the second virtual grating is arranged to be 2n times that of the carrier fringes contained in the recorded plate. As a result, the load fringes are revealed with a multiplication factor of 2n. The interpretation of the optical multiplication method from wave-front interference theory is given and an experiment is conducted.
© 1995 Optical Society of America
Full Article | PDF ArticleMore Like This
Krzysztof Patorski and Matgorzata Kujawinska
Appl. Opt. 24(18) 3041-3048 (1985)
Krzysztof Patorski, Daniel Post, Robert Czarnek, and Yifan Guo
Appl. Opt. 26(10) 1977-1982 (1987)
Michael L. Basehore and Daniel Post
Appl. Opt. 21(14) 2558-2562 (1982)