JVC 330 Service Manual page 86

Chapter 2—Functional Descriptions
CRT Image
Relay
CRT
Lens
Focuses
CRT Image
Image onto
the ILA
High Intensity Light
Cold
Arc
Mirror
Lamp
Filters
Generates
infrared
high intensity
light
light beam
2- 2-74
!
Combined Image and High
Intensity Light=Bright Image
ILA
Image and
High intensity
Arc lamp light
are combined
at the ILA and
reflected back
toward prism
Blue dichroic reflects blue, passes
green & red. Green dichroic reflects
green, passes red.
UV Filter and
Condensing
Lens
Filters out U.V.
light. Condenses
the light beam
Figure 2-19 Optical Block Diagram
HJT Model 330, 340SC, and 370SC Service Manual
Projection
Prism
Lens
Prism horizontally polarizes
the light and directs it to the
ILA. Also passes reflected
vertically polarized light
coming from the ILA to the
projection lens
High Intensity Blue Light
Blue Dichroic
Mirror
Green Dichroic
Mirror
Red Dichroic
Mirror
Screen
Down-steering mirrors steer
light to correct prism.
Blue Down-
Steering Mirror
Green light to
Green Down-
green prism
Steering Mirror
Red light to
Red Down-
red prism
Steering Mirror