System and process for video monitoring a welding operation
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United States of America Patent
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Oct 19, 1993
Grant Date -
N/A
app pub date -
Jan 29, 1992
filing date -
Jan 29, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A configuration or system of lenses for use in an arc welding environment variably filters light so that the dramatic contrasts of light present in the welding area are reduced for better remote viewing. A photochromic lens forms a negative image of the welding area. The negative image of the photochromic lens serves as a variable density optical filter to reduce the brightness of the image incident upon the photochromic lens. A first lens initially gathers and focusses the light upon the photochromic lens. Subsequent lenses further prepare the image for camera reception by eliminating ultraviolet (UV) light, by eliminating light at spectral lines, and/or by enhancing the depth of field of the image.
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