17 Holographic Sensing
17.1 Introduction
In Chapter 12 it was pointed out that a holographic storage medium must not change during or after recording in a way leading to a change in the Bragg angle so that we must avoid changes in refractive index modulation and average refractive index, recorded fringe spacing, and hologram thickness. Considerable research effort has been expended in the development of very robust, low-shrinkage recording materials.
However, holographic recording materials that change in response to external stimuli make a wide range of sensing applications possible. We can exploit dimensional and other changes in a hologram, enabling it to perform a sensing action for different physical, chemical, ...
Get Introduction to Holography, 2nd Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.