Illumination unit having a facility for preventing contamination

Details Illumination unit having a facility for preventing contamination Illumination unit having a facility for preventing contamination

1994-11-29

1996-04-16

Anderson, Bruce C.

Radiant energy

Irradiation of objects or material

250504R, G01J 100, A61N 500, G21G 500

Patent

active

055085288

ABSTRACT:
An imaging apparatus and an illumination unit for use in such an apparatus are described, which unit comprises an illumination housing (LH) accommodating a radiation source (LA) and at least a reflector (RL). To prevent a decrease of the radiation power supplied by the illumination housing, this housing is provided with means (LA, SH, L.sub.29) which prevent a diffuse deposit of silicon-containing particles present in the ambient air from being formed on optical components within the illumination housing.

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patent: 5191200 (1993-03-01), Van Der Werf et al.
patent: 5377708 (1995-01-01), Bergman et al.
patent: 5387800 (1995-02-01), Kurtich et al.

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