The formula to calculate the Image Brightness (IB) is:
\[ \text{IB} = \text{L} \times \text{SG} \]
Where:
Screen gain is a measure of how much a projection screen amplifies the light from a projector. A screen with a gain of 1.0 reflects the same amount of light as a standard whiteboard, while a screen with a higher gain reflects more light, resulting in a brighter image. Screen gain is important for determining the suitability of a screen in different lighting conditions and for various sizes of audiences.
Let's assume the following values:
Using the formula to calculate the Image Brightness:
\[ \text{IB} = 3000 \times 1.5 = 4500 \text{ lm/m²} \]
The Image Brightness is 4500 lm/m².
