Optics: image projectors – Plural projection paths with single light source
Patent
1988-09-26
1991-06-25
Miller, Stanley D.
Optics: image projectors
Plural projection paths with single light source
350334, 350331R, 350415, 353114, G02F 113
Patent
active
050261452
ABSTRACT:
An exposure apparatus for use in fabricating a printed circuit board. A thermally-written liquid-crystal light valve is provided in which a pattern is formed by opaque portions and transparent portions. A writing optical system directs a heating spot light onto the light valve. The light valve and/or the heating spot light is movable, relative to the other. A projecting optical system is arranged which transmits a luminous flux emitted from a light source, through a liquid-crystal layer within the liquid-crystal light valve. The projecting optical system illuminates a subject with the transmitted luminous flux.
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Inage Tomonori
Ishizuka Tazuko
Marui Masatoshi
Matsui Vuji
Asahi Kogaku Kogyo Kabushiki Kaisha
Mai Huy K.
Miller Stanley D.
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