Download Basics of Holography ( Cambridge University Press ) by P. Hariharan PDF

By P. Hariharan

Fundamentals of Holography is a normal creation to the topic written by means of a number one employee within the box. It starts off with the idea of holographic imaging, the features of the reconstructed photograph, and many of the varieties of holograms. useful facets of holography are then defined, together with gentle assets, the features of recording media and recording fabrics, in addition to equipment for generating sorts of holograms and computer-generated holograms. eventually, vital functions of holography are mentioned, corresponding to high-resolution imaging, holographic optical parts, info processing, and holographic interferometry.

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2. Thin and thick holograms Volume transmission and reflection gratings and their associated vector diagrams for Bragg incidence [Kogelnik, 1967]. be high enough to produce a sharp, monochromatic image when the hologram is illuminated with white light. When analyzing the diffraction of light by volume gratings, it is necessary to take into account the fact that the amplitude of the diffracted wave increases progressively, while that of the incident wave decreases, as they propagate through the grating.

17) and that, as the modulation amplitude increases, an intermediate regime appears and widens [Moharam, Gaylord & Magnusson, 1980a,b]. 5 Diffusely reflecting objects The values of diffraction efficiency obtained with a hologram of a diffusely reflecting object are always much lower than those for a grating, because it is not possible to maintain optimum modulation over the entire area, due to the local variations in the amplitude of the object wave. 1. 6 Multiply exposed holograms With a thick recording medium, it is possible to record two or more holograms in the same medium and read them out separately.

It is inexpensive and operates on a single spectral line at 633 nm which is well matched to the peak sensitivity of many photographic emulsions. In addition, it does not require water cooling and has a long life. 1. 1 Lasers Fig. 1. 39 Optical system of an argon-ion laser. Argon-ion (Arϩ) lasers are more expensive and complex, but give much higher outputs in the green (514 nm) and blue (488 nm) regions of the spectrum. The Arϩ laser normally has a multiline output but can be made to operate at a single wavelength by replacing the reflecting end mirror by a prism and mirror assembly, as shown in fig.

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