Document Detail

Atmospheric Vision 0.35 microm less, similarlambda less, similar 14 microm.
MedLine Citation:
PMID:  20134899     Owner:  NLM     Status:  In-Data-Review    
A unique analytical description of atmospheric vision in the wavelength range from 0.35 microm to 14 microm is presented. The signal-to-noise ratio corresponding to the apparent radiance difference at the observation site is used as the basic physically limiting magnitude. It establishes a general vision formula, Eq. (18). This shows that the contrast, C = (L(1) - L(2))/(L(1) + L(2)), contrast degradation, and a contrast threshold C(min) = 1/tau DeltaQ(T) can be used for the description of photon-noise limited imaging devices, including the influence of path radiance. Koschmieder's theory of atmospheric vision follows as a special case, using a constant contrast threshold for the human eye. Thermal vision in the atmosphere is discussed, together with the relevant magnitudes for the description of photon-noise limited and detector-noise limited imaging devices that are to be described by the apparent radiance difference only. Finally the problem of defining a characteristic length comparable to the meteorological range V(N) is considered, and a wavelengthdependent meteorological range Vlambda together with a standard maximum range for a special device V(s) is proposed.
D H Höhn
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Applied optics     Volume:  14     ISSN:  0003-6935     ISO Abbreviation:  Appl Opt     Publication Date:  1975 Feb 
Date Detail:
Created Date:  2010-02-05     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0247660     Medline TA:  Appl Opt     Country:  United States    
Other Details:
Languages:  eng     Pagination:  404-12     Citation Subset:  -    
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