Exposure Lamp - Toshiba e-STUDIO520 Service Manual

6.4.2

Exposure lamp

External electrode type Xenon fluorescent lamp is used as an exposure lamp in this equipment.
1) Structure
The fluorescer is applied to the inside surface of the lamp pipe (except for a part which serves as an
opening) which is filled with the Xenon gas.
A pair of the external electrodes covered by film with adhesive agent is attached around the pipe.
PET film
Aluminum tape
electrode
Adhesive agent, PET, film
2) Behavior inside the lamp
The electron inside the pipe is led to the electric field by applying voltage to the pair of the external
electrodes, 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 ultraviolet rays convert the fluorescer into visible light.
(1) Electrode
(4) Ultraviolet lay
(6) Visible light (irradiated from the opening to outside the pipe)
(7) Openig
March 2005 © TOSHIBA TEC
Fig.6-6
(5)
(2)
(7)
(4)
(3)
(2) Electron
(5) Fluorescer
(8) Harness
Fig.6-7
6 - 7
Glass valve
Fluorescer
Xenon gas
(6) (1)
(8)
(3) Xenon atom
e-STUDIO520/600/720/850 SCANNING SECTION
6