Toshiba e-studio 250 - Exposure Lamp Control; Exposure Lamp

December 2002 TOSHIBA TEC 7 - 9 e-STUDIO160/200/250 SCANNER
7.5 Exposure Lamp Control
7.5.1 Exposure lamp
External electrode type Xenon fluorescent lamp is used as an exposure lamp in this copier.
(1) Structure
Fluorescer is applied on the inside surface of the lamp pipe (except a part to be an opening) which is
filled with the Xenon gas.
A pair of the external electrodes covered by the film with the adhesive agent is attached over the pipe.
(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 discharge is started.
Electrons then flow and clash with the Xenon atom inside the pipe to excite them, and generate the
ultraviolet ray.
This ultraviolet ray converts the fluorescer into the visible light.
(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
PET film
Xenon gas
Fluorescer
Glass valve
Adhesive agent
Aluminum tape electrode
08-05-03
08-05-04
(1)
(8)
(6)
(3)
(4)
(2)
(5)
(7)