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 #:
00041
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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MANAGERS AND PROJECTIONISTS 492g On the other hand surface F, made by the same company, is an excellent surface for a wide auditorium, since it has a straight-in-front reflection of 80%, and at 50° (for some reason Mr. Jones only carried this one out to 40°, but presumably the loss would continue to 50% in about the same proportion) it has not dropped enough to be seriously objectionable. Surfaces G and H are examples of screens which have characteristics which entitle them to serious consideration for use in theatres of medium width and considerable depth. Surface G has reflective power equal to plaster up to a 30° viewing angle, and a reflection power many times that of plaster from straight-in-front. There is a pretty heavy fade away, yes, but one must see what the possible viewing angles of his seating will be and decide whether that fade-away will be sufficiently objectionable to offset the advantage of high reflection power within the more narrow angles. Surface H is another example of a surface which has highei reflection power than plaster (I use plaster as a comparison surface, because we all know about what the plaster will do in the matter of light reflection) above a 22° angle, sinks to that of cloth at 30°, and is quite poor in reflection powers below the 30° viewing angle. It would appear about six times as bright at a straight-in-front position as it would at a 50° angle. These surfaces are all included in the accompanying tables.