Toshiba e-studio550 Service Manual page 92

6. 4. 2. Exposure lamp
External electrode type Xenon fluorescent lamp is used as an exposure lamp in this copier.
(1) Structure
The fluorescer is applied to the in-
side surface of the lamp pipe (ex-
cept for a part which serves as an
opening) which is filled with the Xe-
non gas.
A pair of the external electrodes
covered by film with adhesive agent
is attached around the pipe.
(2) Behavior inside the lamp
The electron inside the pipe is led
to the electric field by applying volt-
age to the pair of the external elec-
trodes, and the discharge is started.
The electrons then flow and clash
with the Xenon atoms inside the pipe
to excite them and allow them to
generate ultraviolet rays. This ultra-
violet rays convert the fluorescer into
visible light.
e-STUDIO550/650/810 SCANNING SECTION
PET film
Aluminum tape
electrode
Adhesive agent
(7)
(2)
(1)Electrode (2)Electron (3)Xenon atom (4)Ultraviolet ray (5)Fluorescer
(6)Visible light (irradiated from the opening to outside the pipe)
(7)Opening (8)Harness
6 - 8
(6)
(5)
(4)
(3)
JUNE 2002 © TOSHIBA TEC
Glass valve
Fluorescer
Xenon gas
(1)
(8)