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Jos. Schneider Optische Werke Gmbh

Optische Systeme Gottingen Isco-Optic Gmbh

Horst Linge

Wolfgang Reinecke

Bernward Bretthauer

Jens Muller

The invention relates to a projection objective with fixed focal length for digital projection, characterized by the following features:

Projection objective with fixed focal length formed of several subassemblies for digital projection

A lens assembly comprising nine lenses. Each lens includes u greater than or equal to about 12.8&deg;, LEP equal to or from about 100 mm to about 400 mm, &agr; Rba greater than or equal to about 1&deg;, and &agr; Rbi less than or equal to about &minus;14&deg;. The outward ray angle tilt and the inward ray angle tilt are positive if the outward ray and the inward ray intersect the optical axis at a location which, when seen from the object, is in an opposite direction to projection. The outward ray angle tilt and the inward ray angle tilt are negative if the outward ray and the inward ray intersect the optical axis at a location which, when seen from the object, is in the direction of projection.

Projection lens

A lens assembly comprising seven lenses. Each lens includes u greater than or equal to about 12.8&deg;, LEP equal to or from about 100 mm to about 400 mm, &sgr;Rba greater than or equal to about 1&deg;, and &sgr;Rbi less than or equal to about &minus;14&deg;. The outward ray angle slopes and the inward ray angle slopes are positive if the outward ray and the inward ray intersect the optical axis at a location which, when seen from the object, is in an opposite direction to projection. The outward ray angle slopes and the inward ray angle slopes are negative if the outward ray and the inward ray intersect the optical axis at a location which, when seen from the object, is in an opposite direction to projection.

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Kaufungen, Germany

Horst Linge