6 Practical Recording Materials
6.1 Introduction
The ideal recording material for holography should possess multiple features. It should have high sensitivity to a laser light source whose characteristics, particularly its coherence length, should in turn be suitable for holography. As we saw in Chapter 5, high spatial resolution is also important. Linearity in response is important as well, and image quality implies the need for low noise, which in turn implies that the material should have no grain structure or, if there are grains, they should be extremely small to minimise light scatter. Availability in a range of formats is also desirable, as is mechanical stability, or at least the recording material should ...
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