Gain on The Screen?

The gain of a projection screen is the ratio of it reflectivity compared to a perfect matte white (lambertian diffuser) standard (magnesium carbonate or sulfate are typical examples). Measures the ability to reflect light from a projection screen. The higher the number, the greater the amount of reflected light to release the viewer (s).

The majority of screens have a gain between unity (1) and 1.3 which are suitable for most applications.

Each screen on the market has its gain factor. Some screens have a low profit and others is high. The theater screens while most are white lower its profit, about 1.0 to 1.3. On some of the gray screens is less than 0.8. On the other hand, a seller is offering screens with a gain of more than 6.0. Anyway, unless you have gone to buy a screen before knowing that all these numbers mean.

Winning is a reflection of the extent of any surface-screen or projection. The number of profit represents a level of light that is reflected from the screen compared with the light reflected from any whiteboard. Then, shielded with a gain of 1.0 reflects the same amount of light that a white wall. A screen with standard 1.5 gain will reflect 50% more light than a white wall, but if a gray screen with 0.8 level of profit, will reflect 80% of the light from the white wall.

The gain is far from the point of advantage where the screen is shiny, which is directly in front and perpendicular to the screen. Technically the measurement of the gain at this point is known as peak gain in a shaft of light from zero degrees. If it is moved to one side and see the screen from an angle, so brilliant in the projected image fell. The angle from which the gain falls to 50% of the peak is known as angle of view of half profit. A person who sees the display from this angle you'll see an image half of shiny that the person who is sitting right in front of the screen.

Low gain screens have a higher angle of view of half profit that screens high gain. This is because the low-gain screen makes more diffuse light in a range angular bigger. A high-gain screen is constructed to reflect more light projector returned in a central area of the projection, and less energy or light at oblique angles of view. This drop in profit increases faster while more moves to zero degrees from the axis of view.