Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1992-01-29
1993-10-19
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
21912123, 358225, 359241, 359244, H04N 718
Patent
active
052550885
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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Anten Lewis
Arc Machines, Inc.
Britton Howard W.
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