F. H. Richardson's bluebook of projection (1935)

Record Details:

Title:
F. H. Richardson's bluebook of projection
Date:
1935
Publisher:
New York : Quigley Publishing Company, Inc.
Volume:
F. H. Richardson's bluebook of projection
Leaf #:
000682
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
{"Media History Digital Library","Jeff Joseph"}
Coordinator:
Media History Digital Library
Description:
Date Added:
June 04, 2024
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DEFINITIONS* There still exists considerable confusion in the matter of terms applied to various items, practices and theories in the field of projection, and it was thought best to incorporate at least a partial list of definitions. Beginners will find the following pages particularly instructive. Absorption of Light The retention in a transparent substance of a portion of the light energy being transmitted. It is transformed into heat. Aberration In a lens it may be either chromatic aberration, which in part breaks up the light into its component colors, or spherical aberration, which causes rays passing through the outer zones of a lens to focus nearer the lens than those passing through closer to its optic axis. Acetate Film Film, the base of which is composed chiefly of cellulose acetate. Acetone A liquid obtained in the process of distillation of wood alcohol. Used in film cements and for other purposes. Actinic Rays Light rays having the property of effecting chemical changes, especially in photographic emulsions. Usually only the green, blue, violet and ultra violet rays are regarded as actinic. However, all light rays — even the invisible ones — are actinic to some extent. *For definitions covering motor generator see page 295. For definitions covering optical terms see page 104. 664