Improvements in photometric equipment fo
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A.H. Taylor
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Article
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1922
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Elsevier Science
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English
β 145 KB
PttOTOMETRIC equipment in use with integrating spheres has not undergone any radical changes since the sphere was first introduced by Ulbrieht. It usually consists of a bar photometer and accessories, including a set of standardized sectored disks and a Lummer-Brodhun photometer-head. In I917, R. V