2.2 Optics
2.2.1 Main construction
Structural diagram
Construction
This machine uses a flash exposure system with a xe-
non lamp light source. The lamp is cooled by the flash
blower and exposure cooling fan.
The lens and mirrors move with the stepping motor. The
home position is detected with a photosensor.
The optical axis is adjusted with a guide wire double nut,
a mirror positioning screw, and a guide eccentric cam.
The right and left shields are independently driven by
stepping motors. The home position is detected by a
photosensor.
A heater prevents condensation on the optics.
1st mirror
Lens (F=8, f=230 mm)
Shield unit
OPC belt
Upper reflector
Xenon lamp
Flash blower and exposure cooling
Reflector
Lens filter
2nd mirror
Optics Lighting mechanism
Magnification
mechanism
Optical axis adjusting
mechanism
Shield mechanism
Anti-condensation
mechanism
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