Question

working of lens projector​

Answer 1

Explanation:

A projector or image projector is an optical device that projects an image (or moving images) onto a surface, commonly a projection screen. Most projectors create an image by shining a light through a small transparent lens, but some newer types of projectors can project the image directly, by using lasers.

Answer 2

This control works just like an old-fashioned view camera, raising or lowering the front lens element with respect to the rear. The projected image is then shifted up or down from the optical center of the lens without introducing any geometric picture distortion.