Photometric apparatus

Details Photometric apparatus Photometric apparatus

2007-03-19

2009-08-18

Evans, F. L (Department: 2877)

Optics: measuring and testing

Infrared and ultraviolet

C356S319000, C356S326000, C250S373000

Reexamination Certificate

active

07576841

ABSTRACT:
A photometric apparatus which includes a cover that houses a UV light source and a photodetector, the cover hermetically sealing an entire light path extending from the light source to the photodetector therewithin; device for replacing an internal atmosphere of the cover with nitrogen gas; and a window plate unit which is adapted to be readily attached to and detached from a partition wall between a light source chamber and a spectral chamber located in a subsequent stage thereof. The window plate unit blocks gaseous communication between the light source chamber and the spectral chamber while allowing measurement light to be transmitted therethrough.

REFERENCES:
patent: 11-211566 (1999-08-01), None

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