Society of Motion Picture and Television Engineers - An Improved Sector Wheel for Hurter and Driffield Sensitometry

Author(s): M. Briefer
Publisher: Society of Motion Picture and Television Engineers
Publication Date: 1 May 1925
Volume: 9
Page(s): 85 - 89
ISSN (Paper): 0096-6460
DOI: 10.5594/J10335
Regular:

WEFIND in "Investigations on the Theory of the Photographic process,"1 that as early as 1840 the sector wheel, a disk with successively increasing angular apertures, was proposed by... View More

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