One of the show’s projectionists brought through a cheap LED projector he had bought to try. He was disappointed at the intensity of the image, and it really isn’t that great for anything other than a very dark room or an image of around a metre across (about 3 feet).
The light path is from a well cooled rectangular LED firing into a collimating assembly and then going through a polarising filter, LCD panel and fresnel keystone correction lens before bouncing off a front silvered mirror and exiting the unit via the focusable lens. The construction was pretty good and it gave usable results for a low-key application.
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