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Chapter 4---Optical
Model 250 Service Manual 4-7
Figure 4-4
Arc Lamp Assembly top view.
4.2 Optical Path
Optical Path - Main Function
!
Transports the Arc Lamp high intensity light from the Arc Lamp to the
ILA
®
and from the ILA
®
to the Projection Lens
!
Removes the Infrared light that contains most of the heat
!
Removes the unwanted Ultraviolet light
!
Condenses the white light using the Light Pipe for a uniform output
!
Separates the white light into its RGB component colors using Dichroic
Beamsplitters.
!
Polarizes each of the component RGB light beams
!
Combines the component RGB image beams into one beam and delivers
that to the Projection Lens.