Carl Zeiss Jena Gmbh

Carl Zeiss Jean Gmbh

Christfried Symanowski

Dietrich Schmidt

Gudrun Schroeter

Enrico Geissler

Jens Hofmann

Gudrun Schr&ouml;ter

Arne Troellsch

Mario Zielke

Harald Kiessling

The invention is directed to an arrangement for the polarization of light, preferably for use in projectors. It comprises at least one illumination source, an integrator with a structural component part which is arranged in the light entrance plane, has the entrance opening, and is constructed so as to be reflecting in the direction of the interior of the integrator, as well as components for the polarization and reflection of partial beams of the light bundle entering the integrator. According to the invention, at least two reflecting polarizers are arranged in the light exit plane of the integrator in the same angular position relative to the axis of the integrator. The polarizers have polarization directions that are rotated relative to one another. Phase plates which adapt the polarizers with non-transmitted polarization directions to the polarizers with transmitted polarization directions are provided outside of the integrator.

Arrangement for polarization of light

The invention relates to a light-mixing rod for homogenizing a light bundle, preferably for use in projection devices, wherein the intensity centroid of the light bundle moves in a longitudinal direction between a light inlet surface and a light outlet surface, and reflecting surfaces are present in the light-mixing rod, the surface normals of said reflecting surfaces being perpendicular or inclined relative to said longitudinal direction, with partial beams being reflected by said reflecting surfaces so as to guide the light bundle. Light emitting diodes having a direction of action oriented toward the interior space and having a defined radiation characteristic are provided in the lateral surfaces of the light-mixing rod and/or in the light inlet surface for the purpose of forming the light bundle.

Light-mixing rod

An arrangement in which the light emitted by a source of light ( ) is directed by means of illumination optics ( ) onto a surface ( ) by which an image can be generated that can be projected by means of projection optics ( ), onto a screen, wherein the illumination optics ( ) have an optical device ( ) arranged following the source of light and a prism ( ) positioned between the surface ( ) and the optical device ( ), and the light coming from the optical device ( ) is deflected without reflection by means of the prism ( ) herein the optical device ( ) has a first optical axis ( ), and wherein said projection optics comprises a first and a second partial optics ( ) having a shared second optical axis ( ) and in that the surface ( ) is reflective, whereby the first optical axis ( ), together with the second optical axis ( ), includes an angle that is smaller than 90&deg;, and whereby the optical device ( ) lies outside of an area that is traversed from the second partial optics ( ) to the first partial optics ( ) by the light that is reflected off the surface ( .)

Assembly, in which light from a light source is directed onto a surface

In a device for generating a quadrangular illuminating field, having a light mixing rod, which has a quadrangular cross-section as well as a quadrangular inlet area and a quadrangular outlet area and guides light coupled in via the inlet area to the outlet area, in order to generate therein the quadrangular illuminating field, the outlet area is limited by four rectilinear sides, of which two each meet in one of the corners of the outlet area at an angle which is not equal to 90&deg;.

Device for generating a quadrangular illuminating field and use of such device in an optical device comprising a surface to be illuminated having a predetermined shape

In a light mixing rod comprising an inlet area and an outlet area, which guides light coupled in via the inlet area along a light guiding direction to the outlet area, two mixing rod portions are provided, which are successively arranged in the light guiding direction and optically coupled with each other, a first of which is in the form of a hollow portion into which the second mixing rod portion extends at least partially.

Light mixing rod comprising an inlet area and an outlet area and use of such a light mixing rod in an optical device comprising a surface to be illuminated

In a device for generating a quadrangular illuminating field, having a light mixing rod, which has a quadrangular cross-section as well as a quadrangular inlet area and a quadrangular outlet area and guides light coupled in via the inlet area to the outlet area, in order to generate therein the quadrangular illuminating field, the outlet area is limited by four rectilinear sides, of which two each meet in one of the corners of the outlet area, and, in one or two corners, the sides meeting therein converge at right angles while, in the other corners, the sides meeting therein converge at an angle, which is not equal to 90&deg;.

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Jena, Germany

Christfried Symanowski