Incremental printing of symbolic information – Light or beam marking apparatus or processes – Scan of light
Patent
1993-07-12
1996-04-09
Wong, Peter S.
Incremental printing of symbolic information
Light or beam marking apparatus or processes
Scan of light
347243, 347244, 359733, G01D 942, G02B 1700
Patent
active
055066143
ABSTRACT:
The present invention is a thin film coating that may be applied to various optical elements and a method for controlling the size of the imaging spot from multiwavelength sources in an optical path. A selective optical element made in accordance with the principles of the present invention comprises an optical surface. Upon the surface, thin film coatings are deposited that define zones of transmission, each zone transmits a desired wavelength band. Beyond this zone, the surface is effectively opaque to a specified wavelength band. The zones for each wavelength are individually calculated to give an effective aperture for each wavelength such that the spot size for all wavelengths meet user specifications.
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Gibson Randy W.
Wong Peter S.
Xerox Corporation
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