Radiation apparatus

Details Radiation apparatus Radiation apparatus

1995-04-19

1999-04-27

Henry, Jon W.

Optical: systems and elements

Absorption filter

Fluid

359892, 359350, 359358, 362318, 250504R, G02B 524, G02B 522, F21V 904, F21V 500

Patent

active

058985301

ABSTRACT:
A radiation apparatus comprising a radiation source and a filter arranged in an optical path, said filter comprising two transparent filter discs which are arranged substantially in plane-parallel fashion relative to each other and which are held with their surrounding edges in a frame made of a material of good heat conduction, the filter discs and the frame defining a closed cavity which has provided therein a medium for selectively influencing the radiation spectrum. The frame is divided substantially in a direction transverse to the filter axis into first and second frame halves in such a manner that the one filter disc is arranged on the first frame half at the side facing the cavity and the other filter disc is arranged on the second frame half at the side facing the cavity.

REFERENCES:
patent: 2380682 (1945-04-01), Boerstler
patent: 2783682 (1957-03-01), Swenson
patent: 3572907 (1971-03-01), Cindrich
patent: 3914010 (1975-10-01), Zeller
patent: 4789784 (1988-12-01), Grossman et al.
patent: 4939374 (1990-07-01), Greutert

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