This thesis develops a theory of holographic recording valid for thin recording materials. Chapter I introduces holography and gives a historical survey of previous work. It serves to delineate the assumptions used in the remainder of the thesis and to define some terminology used in holography. Chapter II treats the linear theory of hologram recording. The Ta-E curve for the film is introduced and a method for measurement is described. The concept of modulation transfer function (MTF) for holograms is discussed and a method of measurement of MTF is given. Finally, the combined effect of MTF and film size is examined. It is shown that the holographic imaging technique is space-variant; however, it is also shown that under some conditions the technique is space-invariant. Chapters III and IV deal with nonlinear effects introduced by the film. The effect is examined using a Fourier transform technique and a power series expansion. The power series shows that the modified transmittance is the product of the linear transmittance and a polynomial in B, the normalized deviation from the mean of the light scattered by the object to the hologram. The results of the power series technique are used to examine the effect of the modified transmittance on the reconstructed image. A theory which predicts the magnitude of the effect is given along with experimental results which tend to confirm the theory. In Chapter IV, another.theory, which predicts both the magnitude and the distribution of the nonlinear effect, is given along with further experimental results. Chapter V examines the effect that the film-grains have on the holographic technique. A formula for the signal-to-film-grain-noise ratio is derived in terms of the intensity transmittance spectrum of the random transmittance fluctuations caused by the recording-film grains.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:623072 |
| Date | January 1968 |
| Creators | Kozma, Adam |
| Publisher | Imperial College London |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Source | http://hdl.handle.net/10044/1/15933 |
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