Optoma EP680, Руководство по обслуживанию

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Service Manual
3-3
3.2 Optical projection system
3.2.1 Description of basic operation principle
q
The lamp, 250 watts metal halide, emits brilliant light to get 450 Lm.
q
The light emitted from the lamp is reflected by a parabolic reflection mirror and resulting
parallel light evenly illuminate the face of the liquid crystal panel.
q
The light flux that has passed through the integrator lens is color-separated by DM-C and
DM-G, penetrates a condenser lens and polarizer and irradiates the liquid crystal panels
R and G.
q
The light flux that has passed through DM-G has (its optical path length from panels R
and G is different in distance therefrom) compensated by a pair of relay lenses and then
irradiates the liquid crystal panel B.
q
The lights that have passed through each liquid crystal panel are combined by a Dichroic
prism, enlarged and projected onto a screen by means of a projecting lens.
3.2.2 Block diagram
Lamp
1
2
3
4
7
1
9
5
6
1
3
2
4
1
8