BEAM-COMBINING DEVICE AND COLOUR IMAGE PROJECTION APPARATUS PROVIDED WITH SUCH A DEVICE

An optical device for combining at least two sub-beams (bG, bR, bB) of different colours to one colour beam (bC) is described, which device comprises at least one colour-selective reflector which is arranged on a transparent plate-shaped substrate. By using a correction element composed of a first s...

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Bibliographic Details
Main Author WORTEL, FRANCISCUS, JOHANNES, MARIA
Format Patent
LanguageEnglish
French
German
Published 17.10.2001
Edition7
Subjects
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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Summary:An optical device for combining at least two sub-beams (bG, bR, bB) of different colours to one colour beam (bC) is described, which device comprises at least one colour-selective reflector which is arranged on a transparent plate-shaped substrate. By using a correction element composed of a first sub-element chosen from the group of cylindrical lens and obliquely arranged spherical lens, and a second sub-element chosen from the group of plane-parallel plate, wedge and prism, aberrations caused by the substrate in a sub-beam can be corrected.
Bibliography:Application Number: EP19950915299