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Practical Holography, 4th Edition
book

Practical Holography, 4th Edition

by Graham Saxby, Stanislovas Zacharovas
September 2015
Beginner to intermediate content levelBeginner to intermediate
676 pages
25h 29m
English
CRC Press
Content preview from Practical Holography, 4th Edition

Appendix D: Fringe Stabilization

How puzzling all these changes are! I’m never sure what I’m going to be from one minute to another!

Lewis Carroll

Alice in Wonderland

The most common cause of failure of a hologram is movement of the primary fringes during exposure. The problem of fringe stability is particularly serious when working with low-power lasers, or with very large holograms, or with nonsilver materials such as photoresist, where exposures even with powerful lasers may be several minutes.

The answer is an active fringe stabilizer. This works on the servomechanism principle (servo for short). The elements of a servo system are an error detector, an amplifier, and an output to correct the error. In the case of the fringe stabilizer, the ...

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Publisher Resources

ISBN: 9781482251586