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Efficient uniform illuminators using diffusing optics
Author(s) -
Venable William H.
Publication year - 1991
Publication title -
color research and application
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.393
H-Index - 62
eISSN - 1520-6378
pISSN - 0361-2317
DOI - 10.1002/col.5080160606
Subject(s) - optics , position (finance) , object (grammar) , light source , color difference , integrating sphere , computer science , component (thermodynamics) , physics , computer vision , artificial intelligence , finance , filter (signal processing) , economics , thermodynamics
Unless specimens are illuminated uniformly with respect to both position on the specimens and directon of incidence, reliable visual judments of and measurements of object color difference cannot be made. Devices producing illumination suitable for color difference evaluation can be made using an integrating sphere as and optical component intermediate between the primary source of light and the illuminated area. Properly designed, such sources can be as efficient as the more common sources using imaging optics. Techniques for designing such sources are described.