A projection lamp projects advertisements on the wall
Projection advertising is the latest way of advertising in the 20th century. Through lighting, the customized advertising content is projected on the high wall. Through a novel way, the multi-color way is easy to attract people to watch, so as to achieve the purpose of advertising.
What is the distance between the projection lamp and the wall
So when we are projecting advertisements, how far is the distance between the projection lamp and the wall? In fact, there is no standard answer to this question. If you want to understand the distance between the projection lamp and the wall, you first need to understand the imaging principle of the projection lamp. The projection lamp is projected through the lens.
I believe that through the above answers, I believe that many friends should understand that the distance between the projection lamp and the wall is completely related to the size of the projection we need. For example, using our 0.65 lens, the imaging size of one meter away is 65 cm. It should be noted here that whether it is oblique projection or linear projection, the distance of one meter is measured according to the distance of the straight line.