Abstract: The invention relates to a rear project device, comprising a screen, projection optics, and an image module for generating an image, which is projected from the rear onto the screen by means of the projection optics, so that an observer located in front of the screen can perceive the image projected onto the screen. Furthermore, a method for such a rear projection apparatus is described. To this end, a Fresnel mirror, or an aspherical mirror, is used.

Abstract: A projector for projecting light onto a projection surface includes a first group (1) with a negative meniscus, a second group (2) with positive refractive power, a third group (3) with a single lens, a fourth group (4) with a lens with positive refractive power, and a field lens (5) with positive refractive power, such that the light passes through the projection objective from the fourth to the first group. In order to be provide a high image quality with a small number of optical components and the smallest dimensions, the projector is configured so the common focal width of the fourth group (4) and the field lens (5) is smaller than twice the image circle diameter (9) of the projection objective and the maximum free diameter (8) is smaller than the overall focal width, and in particular smaller than 0.8 times the overall focal width of the projection objective.

Abstract: The invention relates to a rear project device, comprising a screen, projection optics, and an image module for generating an image, which is projected from the rear onto the screen by means of the projection optics, so that an observer located in front of the screen can perceive the image projected onto the screen. Furthermore, a method for such a rear projection apparatus is described. To this end, a Fresnel mirror, or an aspherical mirror, is used.

Abstract: A projection arrangement is provided, comprising a light source (1), a light modulator (4), which is arranged following the light source (1) and onto which light from the light source (1) may be directed, said light being modulated by the light modulator (4) under the control of a control device (5) on the basis of predetermined image data, in order to generate an image, and projection optics (6) arranged following the light modulator (4) for projecting said image onto a projection surface (9), wherein the control device (5) comprises a control unit (15) and a correcting unit (16), said correcting unit (16) pre-distorting the predetermined image data such that a non-linear distortion caused by the projection optics (6) is compensated, and said control unit (15) controls the light modulator (4) by means of the pre-distorted image data.

Abstract: An arrangement for projecting a multi-color image, including at least two image-generating elements which enable generation of one partial color image each of the multi-color image, and a color combiner which superimposes the light partial beam paths and emits it as a common beam. The arrangement further includes projection optics. The image scales being different for the partial color images, one optical device each is arranged in one or more of the partial beam paths of the partial color images whose image scales differ and each optical device is configured such that, due to the change in the image scale of the corresponding partial color image effected by it, the image scale of the partial color image corresponds to a predetermined, common image scale.

Abstract: An arrangement in which the light emitted by a source of light (44) is directed by means of illumination optics (12) onto a surface (25) by which an image can be generated that can be projected by means of projection optics (4), onto a screen, wherein the illumination optics (12) have an optical device (28) arranged following the source of light and a prism (10) positioned between the surface (25) and the optical device (28), and the light coming from the optical device (28) is deflected without reflection by means of the prism (10) herein the optical device (28) has a first optical axis (29), and wherein said projection optics comprises a first and a second partial optics (22, 24) having a shared second optical axis (20) and in that the surface (25) is reflective, whereby the first optical axis (29), together with the second optical axis (20), includes an angle that is smaller than 90°, and whereby the optical device (28) lies outside of an area that is traversed from the second partial optics (24) to th

Abstract: In an arrangement for projecting a multi-color image onto a projection surface (10), said arrangement comprising at least two image-generating elements (5, 6, 7) which are controllable using a control unit (8) and which enable generation of one partial color image each of the multi-color image, and a color combiner (4) arranged following the image-generating elements (5, 6, 7), wherein the light for the corresponding partial color image coming from the image-generating elements (5, 6, 7) is guided, in one partial beam path each, to the color combiner (4), which superimposes the light guided in the partial beam paths and emits it as a common beam, said arrangement further comprising projection optics (9) arranged following the color combiner (4), on which projection optics (9) the common beam impinges and which project the multi-color image onto the projection surface (10), and the image scales given by said arrangement being different for two or more partial color images, one optical device (18) each is arran

Abstract: 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°.

Abstract: 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°.

Abstract: 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°.

Abstract: 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°.