Projector Screen Gain Meaning

A 1 000 lumen projector aimed at a screen with 1 5 gain will be perceived at 1 500 lumens.

Projector screen gain meaning. Projection screen a white or silvered surface where pictures can be projected for viewing screen silver screen surface the outer boundary of an. Opinions differ as to when this hot spotting begins to be distracting but most viewers do not notice differences as large as 30 in the image luminosity unless. Screen gain synonyms screen gain pronunciation screen gain translation english dictionary definition of screen gain. A screen having a peak gain reading of 1 5 reflects 50 more light directly in front of the light s centerline path when compared to a 1 0 gain screen.

A high gain screen is constructed to reflect more of the projector s light energy back toward the centerline of the projection path and less light energy to the oblique angles of view. A projector screen with a gain measurement of 8. Gain is a property of a projection screen and is one of the specifications quoted by projection screen manufacturers. Thus brightness falls off more rapidly as you move away from the zero degree viewing axis and the half gain viewing angle is relatively narrow.

The number that is typically measured is called the peak gain at zero degrees viewing axis and represents the gain value for a viewer seated along a line perpendicular to the screen s viewing surface the gain value represents the ratio of brightness of the. Inversely a screen with a peak gain of 0 5 reflects 50 less light than a 1 0 gain screen etc. A 2 0 gain screen reflects 100 more light and so on.