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 #:
000184
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:
August 01, 2024
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166 RICHARDSON'S BLUEBOOK OF PROJECTION nation should be approximately 0.18 of a foot candle, approximating the illumination necessary to read theatre programs printed in 8-point type. It is sufficient to enable patrons to locate seats. It does not greatly affect contrasts of light and shade on the screen. (75) The picture is a matter of contrasting shades. Rays from an auditorium light falling upon the screen illuminate all parts. These rays do not alter the white portions, but they light up the deeper tones and thus reduce contrasts. (76) Permit no direct rays of light to reach the screen from any source other than the projection lens. Permit no "glare spot" of light within view of the audience. (77) A l 'glare spot" is a concentrated spot of white light of considerably higher brightness than surrounding objects and has a bad effect both upon the eyes and upon the screen image. (78) Viewing comfort is ability to see all details of a picture without strain. It is attained by a combination of brightness and area. Viewing may be made more comfortable for the eyes either by increase in picture area or by increase in screen brightness. Viewing comfort is ability to see all details of a picture without strain.