Richardson's handbook of projection (1927)

Record Details:

Title:
Richardson's handbook of projection
Date:
1927
Publisher:
New York : Chalmers Publishing Company
Volume:
Richardson's handbook of projection
Leaf #:
00028
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
August 01, 2024
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488 HANDBOOK OF PROJECTION FOR choice of a screen surface lor any particular theatre will ck pend vitally upon the lateral distribution of the seats. Figure 147q And now let us see exactly what that means. In Fig. 147q we have the representation of an auditorium 80 feet wide by 150 feet front to back. The individual" can select the side lines which nit the width of his own theatre. Each of the smail squares is 10 feet each way. In table No. 1 we see that the angle of highest efficiency lies either within or very near to 20 degree lines for ordinary commercial screens, and that beyond 30 degrees all the surfaces except those surfaces having a verv low reflective and high diffusive power) fall off very rapidly, none of them standing much above 50 per cent, at 50 degrees angle. We may therefore conclude that for all the high reflective surfaces tested the range of efficiency lies well within the 50 degree