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3M
Multimedia Projector MP8620
Theory and Diagrams
3M 1999
4-7
4-7.
Optical System Layout
Notice that the optics module is composed of a lamp, a fresnel lens, and an LCD panel.
Lamp
Projects light.
Fresnel Lens
Magnifies the projection image.
Polarizer
Allows light waves, at the right angle, to pass
through
Hot Mirror
Heat management device that passes the light
and reflects heat, IR and UV light.
Cold Mirror
Reflector
Heat management device that reflects the light
and passes heat, IR and UV light.
LCD Panel
Positions the liquid crystal cells that form an
image.
Cold
Mirror
IR and
UV Light
Lamp
Condenser
Lens
Lamp Side
Fresnel
Hot
Mirror
LCD
Lens Side
Fresnel
Lens
Polarizer
IR Light
UV Light
Lamp
Reflector