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Read e-book online Applications of Holography and Optical Data Processing. PDF

By E. Marom, A. A. Friesem, E. Wiener-Avnear

ISBN-10: 0080216250

ISBN-13: 9780080216256

Purposes of Holography and Optical facts Processing includes the lawsuits of the overseas convention on functions of Holography and Optical facts Processing, held in Jerusalem in August 1976. The convention is attended via eminent scientists within the box of optics, characterised by means of high-level medical shows and discussions. the gathering is a illustration of analysis at the leading edge of utilized and theoretical optics. The four-day assembly covers subject matters on holographic functions in medication, interferometry, exhibit, garage, and retrieval, in addition to photograph processing, measuring strategies, spectroscopy, and recording fabrics and units. The members of the convention think within the promising way forward for study on Optical facts Processing so long as suggestions are complemented by way of digital help. The e-book should be of worth to electronics engineers, technicians, desktop scientists, and desktop engineers.

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Additional info for Applications of Holography and Optical Data Processing. Proceedings of the International Conference, Jerusalem, August 23–26, 1976

Example text

Show that, due to the film grain noise, a transmittance has not always an intrinsic definition. Therefore, a measurable or observable transmittance will be defined and its variations as a function of the degree of coherence in the object will be examined ; 3. , the image contrast can strongly vary according to the type of illumination that is used ; 4. show that there is a definitive gain in signal to noise ratio when using incoherent instead of coherent illumination. This gain, nevertheless, varies according to the type of noise involved.

10-91401 - Orsay-France INTRODUCTION To day most of the video signals are recorded magnetically. The magnetic recor­ ding medium (mostly tapes) is inexpensive and is manufactured in vast quanti­ ties, the recording technique is simple, reversible and permits a given record to be erased and rerecorded repeatedly. All of these properties are not found in optical recording but the following advantages make us believe that optical video recording will be important in the future. o p 1. The storage density of video recording is of the order of 10 bits/cm in optics (one standart TV frame is stored in the area of less than 1 mm ) com­ pared to less that 10?

Then its transmittance t(r,6) can be expressed in polar coor­ dinates by t(r,9) = i { 1 + cos[p rcos(0-<(>) + Δ]} (1) where Δ is a phase which can be determined to suit our needs. If the image incident on the detector is f(r,9) , the total transmitted light will be Ι(φ) = / v/o i = - I f(r,6)t(r,0)rdrd6, «/O r2,nrK I f ( r , 0 ) { l + cos[p rcos(6-c|)) + Δ ]}rdrd6 (2) This is equal to a constant plus the Fourier Transform of f(r,6) evaluated at the spatial frequency (pQcos φ, p sin φ) . In other words the rotating grating samples the Fourier Transform Ρ(ρ,φ) of f(r,6) on a circle in the Fourier plane, having radius P .

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Applications of Holography and Optical Data Processing. Proceedings of the International Conference, Jerusalem, August 23–26, 1976 by E. Marom, A. A. Friesem, E. Wiener-Avnear


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