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6.4.2 Exposure lamp
Externalelectrodetypexenonuorescentlampisusedasanexposurelampinthisequipment.
(1) Structure
Fluorescer is applied on the inside surface of the lamp pipe (except a part to be an opening)
whichislledwiththexenongas.
Apairoftheexternalelectrodescoveredbythelmwiththeadhesiveagentisattachedoverthe
pipe.
(2) Behavior inside the lamp
Theelectroninsidethepipeisledtotheelectriceldbyapplyingvoltagetothepairoftheexter
-
nalelectrodes,anddischargeisstarted.Electronsthenowandclashwiththexenonatominside
thepipetoexcitethem,andgeneratetheultravioletray.Thisultravioletrayconvertstheuoresc-
er into the visible light.
PETlm
Aluminum tape
electrode
Adhesive agent,
PET,lm
Glass valve
Fluorescer
Xenon gas
(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
(1)
(6)
(8)
(7)
(5)
(2)
(4)
(3)
Fig. 6-402
Fig. 6-403