Combined infrared filter and light focusing apparatus for a merc

Details Combined infrared filter and light focusing apparatus for a merc Combined infrared filter and light focusing apparatus for a merc

1975-04-07

1976-12-28

Weldon, Ulysses

Buckles, buttons, clasps, etc.

240 9A, 240103R, F21V 2900

Patent

active

040004074

ABSTRACT:
One or more hollow, light transparent elements filled with a liquid coolant-filter are interposed between a high intensity mercury vapor lamp and an object to be illuminated in order to simultaneously filter out infrared radiation and focus the illumination from the lamp. In two embodiments the light transparent elements include two hollow quartz tubes which, in the first embodiment, are parallel to each other and to the lamp and in the second embodiment surround the lamp but are separated from it by an annular air space. In a third embodiment the light transparent elements include a hollow, rectangular, quartz box, for containing the liquid coolant-filter, and a Fresnel lens affixed to the underside of the box for focusing the light.

REFERENCES:
patent: 1435193 (1922-11-01), Anderson
patent: 1457646 (1923-06-01), Wilson
patent: 1630056 (1927-05-01), Buttolph
patent: 1680583 (1928-08-01), Anderson
patent: 1895887 (1933-01-01), Lorenz
patent: 2380682 (1945-07-01), Boerstler
patent: 3766377 (1973-10-01), Junginger

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