Optical pattern projecting apparatus
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United States of America Patent
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Jan 17, 1995
Grant Date -
N/A
app pub date -
Dec 10, 1993
filing date -
Dec 11, 1992
priority date (Note) -
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status (Latency Note)
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Abstract
An optical pattern projecting apparatus comprising a divergent mirror 16 for converting a light beam 13 from a light source 11 into a radially outwardly divergent light beam 13b and a convergent mirror 18 for converting the divergent light beam 13b into a radially inwardly convergent light beam 13d. The convergent light beam 13d is converted by a parallelizing mirror 17 into a parallel zonal ringed light beam 13e which is focused onto a surface of the work piece 15. A polarization beam splitter may be used for deflection-angular polarizing and splitting the light beam into an S-polarized light and a P-polarized light.
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