Barco N.v.

Koen Van Belle

Koen Beyers

Bart Van Den Bossche

Peter De Meerleer

Cindy Van De Velde

Jan Leo Arteel

An optical design is described to be used in a color projection system. The system comprises a white light source (), a light splitting means to split the white beam into color subbeams, optical components to direct each color subbeam on a light modulating means () and a dichroic prism (). The light splitting means and the optical components are arranged such that each of the images of the color subbeams imaged on the light modulating means () has equal size and orientation, i.e. such that the magnification of the color subimage on the light modulating means () is equal. This is obtained by providing equal light paths for each color subbeam or by providing optical components such that either all different color images on the screen are inverted or none of the different color images are inverted.

Optical arrangement for non-inverting illumination system

A system and method for fixing a projection lensand adjusting the position of a projection lensis provided, which is compact and has a high precision. The projection lensis positioned on a base plate. The position of the projection lens can be adjusted by providing possibilities for horizontal and vertical shift in a plane perpendicular to the optical axis of the projection lens. This is performed by actuating three points of the base plate. Furthermore, by providing further shifting means at the three points of the base plate, tilting of the projection lens can be performed, thus providing Scheimpflug correction. In this way, motion of the projection lens in five degrees of freedom is provided by actuating three points at a base platewhereon a projection lenscan be easily mounted and removed.

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Kortrijk, Belgium

Koen Van Belle