Press forming machine for optical devices
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Apr 16, 2002
Grant Date -
Aug 16, 2001
app pub date -
Feb 15, 2001
filing date -
Feb 15, 2000
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A press forming machine for optical devices which manufactures, an optical device from silica glass with a high glass transition point. A transparent quartz tube surrounds an upper die unit, lower die unit, fixed shaft, and moving shaft to form an airtight chamber inside it. Infrared lamps are arranged along the outer surface of the transparent quartz tube, and a reflecting mirror is arranged behind the infrared lamps. A cooling gas jacket is formed to cover the rear surface of the reflecting mirror. The inner-diameter side wall surface of the jacket and the reflecting mirror have many through holes. A cooling gas is sprayed from the interior of the jacket toward the transparent quartz tube through the through holes, thereby cooling the reflecting mirror, quartz bulbs constituting the outer surfaces of the infrared lamps, and the transparent quartz tube.
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