
3M Multimedia Projector MP8670/8745/8755/8770 Theory and Diagrams
Copyright 2000, 3M IPC. All Rights Reserved. 4-6
4-5. Optical System Layout
The following diagrams illustrate the MP8670/8745 optics modules and how the light is directed
throughout.
Notice that the MP8670/8745 optics module is composed of a lamp, lenses, a ½ wave plate (polarizer)
(that allows for passage of both horizontal and vertical light waves), mirrors, dichroic mirrors, polarizers
and LCD panels.
Component Description
Lamp Projects light
Mirror Reflects all light waves.
Dichroic Mirror Coated to reflect some light waves and let others pass through.
½ Wave Plate
(Polarizer)
Allows both horizontal and vertical light waves, at the right angles, to
pass through.
LCD Panel Positions the liquid crystal cells that form an image.
Multi-Lens One lens divided into sections to act as many.
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