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SMPTE RP 12

1997 Edition, January 8, 1997

Complete Document

Screen Luminance for Drive-In Theaters

Includes all amendments and changes through Change/Amendment , January 8, 1997


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Description / Abstract:

This practice specifies the luminance (measured brightness) of the projection screens for drive-in theaters intended for the projection of motion-picture film at 24 frames/sec.

The practice defines luminance ratios among portions of the total screen area, and defines the acceptable variations as viewed from positions within the audience area.

The practice applies to both diffusing and directional screens.

Recognizing the complexities and difficulties of drive-in projection, the practice describes criteria for evaluation of performance that is less than optimum, based upon a minimum luminance level and a maximum luminance variation.