Get Field Guide to Radiometry (SPIE Press Field Guide FG23) PDF

By Barbara Grant

ISBN-10: 0819488275

ISBN-13: 9780819488275

Written from a platforms engineering standpoint, this SPIE box advisor covers subject matters in optical radiation propagation, fabric houses, assets, detectors, procedure elements, dimension, calibration, and photometry. Appendices offer fabric on SI devices, conversion elements, resource luminance info, and lots of different matters. The book's association and vast number of diagrams, tables, and graphs will allow the reader to successfully establish and practice correct info to radiometric difficulties bobbing up amid the calls for of brand new fast paced technical surroundings.

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Extra resources for Field Guide to Radiometry (SPIE Press Field Guide FG23)

Sample text

More general equations for image plane irradiance, from extended and point sources respectively, are Et = τ o τatm π f v (1 − A 2 )L s (θ, φ)cosn θ and 4( f /#)2 (1 + m)2 τ o τatm f v (1 − A 2 ) I s cosn θ Et = d2 where τ o is optical transmittance, τatm is atmospheric transmittance, f v is a vignetting factor, and A = (obscuration diameter/primary mirror diameter) for centrally obscured systems. The variable n accounts for projections of source and target areas, as discussed previously. It is 3 for an isotropic (point) source and typically 4 for an extended Lambertian source.

In this case, the image of the aperture stop typically underfills or overfills the detector. Φ d = L s A o τ o Ω f s− o = τo L s A o A f s f2 If it underfills, all power transferred thus far will be transferred to the detector. Optical transmission τ o is the product of both lens’ transmittances. If it overfills, then Φd = τ o L s A d Ω f sd = τo L s A d A f s d2 where d is the distance from the detector to the field stop. If the image of the aperture exactly fills the detector, either expression for power transfer may be used.

In the latter cases, irradiance responsivity RE and radiance responsivity RL are commonly seen.

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Field Guide to Radiometry (SPIE Press Field Guide FG23) by Barbara Grant

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