Epson EMP 822, Руководство по обслуживанию

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2-6
EMP-822/EMP-83/EMP-X5/EMP-S5
SEIKO EPSON Revision:A
2.2.2 Optical Engine
The Optical Engine consists of the Lamp Unit, the Light Guide Unit, the POP (Panel-on-
Prism) Unit, and the projection lens.
Figure 2-4. Optical Engine
Component
Name
Function/Other
Lamp Unit An UHE-170W high-intensity discharge lamp is used as the light source.
Light Guide
Unit
In addition, a UV filter protects the LCDs from harmful ultraviolet light. After this light is
polarized, it is then split into 3 spectrums (R, G and B).
Multi Lens Alley
(EMP-822 only)
Diffuses the light from the lamp to provide uniform illumination.
Polarizer (PBS)
Polarizes the light and remove the U/V component harmful to the
L/V.
Dichroic Mirrors Disperse the polarized light into the R/G/B spectrums.
POP Unit
The heart of the Optical Engine. Consists of the L/V (R/G/B) and the Prism Unit.
Light Valve (L/V)
Controls the intensity of the distributed components of the RGB
light.
Prism Unit Integrates the RGB light
Projection
lens Sends the integrated light onto the screen. Two adjustment rings are mounted: the Zoom
Ring to scale the projected image, and the Focus Ring to focus the lens.
Zoom Ring
Focus Ring
Projection Lens
POP Assembly
(Prism Unit + L/V(R/G/B))
Light Guide Unit