Optical Subsystem; Overview; Generating And Focusing The Laser Beam - Kodak DirectView CR 800 System Theory Manual

Table of Contents

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.

GALVO System??not an official name?any ideas?."

• Acquiring the Image, by capturing the discharged light and converting it into a usable electronic format.

anything?? what should I call it?."

Generating and Focusing the Laser Beam

1234563 – 12/12/94

See "PMT System ?? This is not an official name of

LASER

LASER ??SAFETY??

A shutter, controlled by the L1 solenoid, that covers the

SHUTTER

beam of the LASER when the LASER is not in use.

L2 LASER SHUTTER

The L1 is a rotary solenoid, responsible for opening and

SOLENOID

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

See "Circuit Boards (BDs)."

REFERENCE BD