New PDF release: Analysis and evaluation of sampled imaging systems

By Richard H. Vollmerhausen

ISBN-10: 0819480770

ISBN-13: 9780819480774

ISBN-10: 0819480789

ISBN-13: 9780819480781

Advancing know-how in detector arrays, flat panel screens, and electronic photo processing presents new possibilities to extend imaging functions and improve approach functionality. Technical managers and layout engineers are confronted with comparing the associated fee, weight, and function of an ever-expanding collection of expertise thoughts. This educational textual content offers the speculation, systems, and knowledge essential to evaluation and evaluate the functionality of obtainable imaging applied sciences. half I updates the sooner paintings provided in Analysis of Sampled Imaging platforms (2000). half II discusses functionality review of electro-optical imagers. half III offers desktop courses (on a supplemental CD-ROM) and up to date details on detector arrays, optics, and exhibit techniques.

The ebook covers numerous demonstrate codecs and interfaces, and offers certain info on to be had focal aircraft arrays (FPAs). specific emphasis is put on idea and perform for the big variety of accessible infrared FPAs. applied sciences represented contain InSb, HgCdTe, QWIP, and uncooled thermal arrays. info is supplied at the quantum potency, blur, crosstalk, and noise features of every know-how. The detector and array dimensions of obtainable FPAs are supplied. the knowledge on optics, exhibit, and FPA subassemblies permits the version person to make quickly and real looking functionality checks of electro-optical imager designs

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Extra resources for Analysis and evaluation of sampled imaging systems

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Contrast is reduced by aerosol scattering of target signal out of the line of sight. Contrast is also reduced by sunlight, moonlight, or starlight scattered by aerosols into the imager’s field of view. See Fig. 10 for an illustration. In most scenarios, path radiance resulting from light scattered into the sensor’s path is the most serious cause of target-to-background contrast loss. The atmospheric path can appear brighter at the imager than at the zero-range target and background. This results in substantial loss of contrast.

In the early stages of system design, however, the output from optical design programs is not available. In the absence of better information, diffractionlimited performance is often assumed. In the MWIR and LWIR, assuming ideal MTF is reasonable for many lenses. 1 describes when the ideal can be assumed and what to use for MTF in other cases. Broadband imagers operating in the visible, NIR, and SWIR do not achieve diffraction-limited performance. 2 provides MTF estimates for objective lenses operating in the NIR and SWIR spectral bands.

First, it maximizes appearance even when the observer is close to the display. Second, it provides the minimum blur size compatible with the flat-field assumption. For a line pitch s millimeters (mm), spot blur MTF Hspot is given by Eq. 5). Spatial frequency mm is in cycles per millimeters on the display. Line spacing s is based on display height in millimeters divided by 525 lines for a lowresolution CRT and 960 lines for a high-resolution CRT. 8 s 2 ξ mm ). 5) The user provides the diagonal dimension of the display.

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Analysis and evaluation of sampled imaging systems by Richard H. Vollmerhausen


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