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By Richard H. Vollmerhausen

Advances in stable kingdom detector arrays, flat panel screens, and electronic photo processing have triggered an expanding number of sampled imaging items and chances. those know-how advancements offer new possibilities and difficulties for the layout engineer and procedure analyst--this tutorial's meant reader.

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This equation allows us to explore design tradeoffs in a sampled imager. BIBLIOGRAPHY Bracewell, R. , The Fourier Transform and Its Applications, McGraw-Hill, New York, NY, 1986. , Linear Systems, Fourier Transforms and Optics, Wiley: New York, NY, 1978. Goodman, J. , Introduction to Fourier Optics, McGraw-Hill: San Francisco, CA, 1968. Holst, G. , Sampling, Aliasing, and Data Fidelity, SPIE Optical Engineering Press, Bellingham, WA, 1998. LePage, W. , Complex Variables and the Laplace Transform for Engineers, Dover Publications, Inc, New York, NY, 1961.

In this case, each point in the original image is blurred by the psf of the next set of optics. If the Optical Transfer Function of the second lens is H2(ξ,η), then: I mg (ξ, η) = H 2 (ξ, η) H (ξ, η) Scn (ξ, η). 4) The total system MTF is the product of the individual MTFs. The transfer function between scene and display is the product of optics MTF, detector MTF, display MTF, and the MTF of other factors which blur the image. Any blurring of the image can be treated as an MTF as long as the blur is constant over the whole image.

Multiplying f(x) by a delta function at location nX produces a delta function with area f(nX). 16. The amplitude (ordinate) scale has changed between these figures. S(ξ), the Fourier transform of the “samples,” is also shown in this figure. G(ξ) results from multiplying S(ξ) by R(ξ). This is true because the height of the delta function is scaled by the value of the intensity distribution at each location. Since the area under each delta function pulse is unity before the multiplication, the area of the product is the sample value.

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