HOLOGRAPHIC NOISE LEVELS IN TWO SILVER HALIDE RECORDING MEDIA

Authors
  1. Hill, K.O.
  2. Jull, G.W.
Corporate Authors
Communications Research Centre, Ottawa ONT (CAN)
Abstract
This paper discusses the origin, distribution and magnitude of photographic recording noise in thin amplitude holograms. Three types of noise are distinguished. The first is intermodulation noise which arises due to the non-linearity of the amplitude transmittance-exposure (Ta-E) characteristics of the photographic emulsion. Its magnitude can be predicted using a recently reported theory, applicable to diffusely illuminated objects. Observations on images from holograms made with Kodak 649F and Agfa-Gevaert 10E70 emulsions show that the intermodulation noise levels agree closely with the theoretical predictions. The second type of noise is surface-relief noise which arises from the distortions of the emulsion surface as a consequence of chemical processing. The 10E70 emulsion was observed to produce higher surface-relief noise than 649F emulsion. For 649F emulsions, the observed surface-relief noise levels agreed with first-order theoretical predictions. The final type of noise is
Date of publication
01 Jan 1971
Number of Pages
14
Reprinted from
Optica Acta, vol 18, no 10, 1971, p 729-742
DSTKIM No
73-00138
CANDIS No
16695
Format(s):
Hardcopy

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