Structure; Laser Diode - Toshiba e-studio550 Service Manual

8. 2. Structure

(1) Laser emission Unit
This unit consists of the laser diode, finite focus lens and aperture.
a. Laser diode
This laser diode features low droop, small laser variation and low threshold current.
Aperture determines the shape of the laser beam at laser emission position.
Laser diode radiates the laser beams responding to the laser emission control (ON/OFF) signals
from the laser drive board. Laser beams which passed through the finite focus lens are focused on
the drum surface.
b. Caution
The beam of the semiconductor laser is very weak (about 5 mW), but focused parallel rays creates
great energy which is hazardous.
Some material of the components of the laser optical unit are metal. Since the unit is in a sealed
container, there is no danger of laser leakage during normal operation.
Note: Laser beam is not visible pay the closest attention when handling the laser unit components or
performing operations such as adjustment of the laser beam, and this kind of operations which are
very dangerous must be performed only by specially trained staff.
The warning label shown below is attached on the front side left inner cover.
[CAUTION]
• Do not approach tools near the path of the laser beam.
• Take off your watches, rings, bracelets, etc. when handling the unit.
JUNE 2002 © TOSHIBA TEC 8 - 3 e-STUDIO550/650/810 LASER OPTICAL UNIT
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