Toshiba 4511, 3511 manual Exposure lamp

6.4.2 Exposure lamp

External electrode type xenon fluorescent lamp is used as an exposure lamp in this equipment.

(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.

PET film

Aluminum tape electrode

Glass valve

	Fluorescer
Adhesive agent,
PET, film	Xenon gas

Fig. 6-402

(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.

(6)

(1)

	(5)
(7)	(2)	(4)	(8)

(3)

(1)

(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

Fig. 6-403

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November 2003 © TOSHIBA TEC 6 - 9 e-STUDIO3511/4511 SCANNER