Kodak DirectView CR 800 System, Theory Manual

Page: 39 / 68

OPTICAL Subsystem
1234563 – 12/12/94 9–39
Section 9: OPTICAL Subsystem
Overview
The CR 800 OPTICAL AY is responsible for 3 main processes:
• Generating and focusing the red LASER beam onto the STORAGE PHOSPHOR PLATE.
• Moving the LASER beam across the plate at a controlled rate in the fast scan direction to discharge the stored energy in the phosphors. See “Operation of the
GALVO System??not an official name?any ideas?.”
• Acquiring the Image, by capturing the discharged light and converting it into a usable electronic format. See “PMT System ?? This is not an official name of
anything?? what should I call it?.”
Generating and Focusing the Laser Beam
LASER
LASER ??SAFETY??
SHUTTER A shutter, controlled by the L1 solenoid, that covers the
beam of the LASER when the LASER is not in use.
L2 LASER SHUTTER
SOLENOID The L1 is a rotary solenoid, responsible for opening and
closing the LASER SHUTTER.
BEAM SPLITTER Reflects most of the beam LASER toward the ??, but
allow a small proportion to pass straight through and
strike a photo diode on the A9 LASER REFERENCE
BD.
COLLIMATER??
BEAM EXPANDER
FOLD MIRROR Changes the direction of the Laser beam to align it in
the center of the slit of the COLLECTOR.
GALVO Directs the laser beam across the plate in the fast scan
direction.
F-THETA LENS
A9 LASER
REFERENCE BD See “Circuit Boards (BDs).”