18 Ultraviolet and Infrared Holography
18.1 Introduction
The advent of lasers operating at many ultraviolet and infrared wavelengths, as well as appropriate detectors and cameras, facilitates using holography at almost any wavelength.
18.2 UV Holography
Gelatin can be used as a UV holographic recording material [1], as can a number of photopolymers in the spectral range from about 400 to 250 nm. CMOS array photodetectors are frequently used in digital UV holography.
Two-photon photopolymerisation using a pulsed or high-intensity CW laser may be used with many of the visible light-sensitive recording materials discussed in Chapter 6. Normally, two-photon photopolymerisation requires confocal counterpropagating ...
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