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 exter- nal 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 fluoresc- er into the visible light.

 

 

 

(6)

 

 

 

(1)

 

 

(5)

 

(7)

(2)

(4)

(8)

 

 

 

 

 

(3)

 

(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

6

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Toshiba 353, 452, 453, 350 service manual Exposure lamp
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350, 353, 453, 452 specifications

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