Abstract: An adapter (10) for pivoting a lens relative to an image sensor in a camera has lens-side and housing-side supporting rings (20, 30) that slide relative to one another by cylindrically curved sliding surfaces (22, 32) facing one another. A virtual cylinder axis (Z) of the sliding surfaces (22, 32) lies in a plane of the image sensor. A transmission lever (50) with first and second lever arms (51,52) is mounted on the lens-side supporting ring (20) and pivots about an axis (H) parallel to the virtual cylinder axis (Z). The first lever arm (51) extends in a circumferential direction on the lens side of the lever axis (H) and is coupled to an adjusting ring (42) mounted rotatably on the lens-side supporting ring (20). The second lever arm (52) extends axially of the housing side and is supported on an anchor (70) fixed to the housing-side supporting ring (30).

Abstract: A method for zero-contact measurement of the topography of a spherically or aspherically curved air-glass surface of an optical lens or lens combination, distinguished in that the surface (S1) to be measured is sampled on its glass rear side with an optical measurement beam through the air-glass surface (S2) lying before it in the measurement direction.

Abstract: A photographic wide-angle lens system with internal focusing has a front array (II) of negative refractive power that is rigid within itself and fixed on the object-side, a rear array (III) of positive refractive power that is rigid within itself and fixed on the image side of an aperture diaphragm (A), and a focusing array (II) of positive refractive power having an optical single element (5) that is arranged between the front array (I) and the aperture diaphragm A and is axially movable from a maximum axial position on the object side to a maximum axial position on the image side to vary the focus distance from its maximum to its minimum value. The optical single element of the focusing array (II) has at least one aspheric surface (51, 52) and the image-side end lens (9) of the rear array (III) is configured as a positive, aspheric meniscus lens.

Abstract: An imaging system having a front side and rear side enveloping a light transmitting space formed therebetween A front lens situated on the front side forms a portal through which light from an object enters into the light transmitting space wherein at least one optical element composed of glass or elastic material, liquid lenses or liquid crystal elements, and an image sensor are positioned to develop a folded beam path between the front lens and the image sensor, and a real image of the object on the image sensor. Electrically driving at least one optical element enables alteration of the focal length within the system in a manner switchable between at least two values. The change in focal length is realized with the aid of electrically controlled piezo-actuators or by an electric field applied to at least one variable optical element.

Abstract: An imaging system for imaging an object onto an image sensor, and which has a front side facing the object and a rear side facing away from the object, the rear side being arranged behind the front side as viewed from the object. Furthermore, the imaging system has a light entrance device at the front side through which light coming from the object can enter into the imaging system. In this case, the light traverses the beam path between object and image sensor. At least one first and one second optical element are likewise present and are arranged at the rear side in such a way that they can influence the beam path. The light entrance device has an electrically switchable liquid crystal element which deflects the beam path at at least one first angle and a second angle which is different from the first angle depending on the electrical switching state. A discretely switchable focal length change is realized by this electrically effected change in the beam path.

Abstract: A high-aperture wide-angle lens for digital image acquisition, comprising five lens elements, as viewed from the object side, i.e. from the left, a first, negative meniscus lens element, a second, positive lens element, a third, positive lens element, a fourth, negative lens element and a fifth, positive meniscus lens element. A diaphragm is arranged between the second lens element and the third lens element. At least three surfaces upstream of the diaphragm and three surfaces downstream of the diaphragm are embodied as aspherical surface. However, further surfaces can also have an aspherical design. On account of its extremely compact design and its outstanding optical properties, the proposed high-aperture wide-angle lens is suitable as an interchangeable lens for so-called “hybrid cameras”.

Abstract: A camera module for imaging an object onto an image sensor and having at least two carrier plates, wherein a plurality of basic lenses are arranged on one carrier plate and a plurality of lens attachments are arranged on the second carrier plate. The carrier plates are arranged one above the other in two planes and are horizontally displaceable in order to position different basic lenses and vehicle attachments in the beam path and thus combine them with one another. One embodiment of the proposed solution comprises for example, six basic lenses and four telenegative lens attachments making it possible to realize 30 discretely switchable different focal lengths and to achieve a quasi-zoom having small dimensions.

Abstract: A system for stereoscopic cinema projection comprising at least one projector for projecting two images, one image for a first eye and one image for a second eye of a viewer, is proposed. The beam paths of the light emerging from the projector respectively run through a linear polarizer to a correspondingly assigned projection lens. After passing through the projection lens, the beam paths of the two images, which are different for the eyes of a viewer, run through a radial and respectively a tangential polarization filter and are simultaneously projected, with different polarization states, exactly one on top of the other onto a metallic projection wall. By means of a visual aid for both eyes of a viewer, the lenses of which are configured differently for each eye with a radial and respectively a tangential polarization filter, each partial image is made visible only for the first or left eye or the second or right eye (or vice versa) and the 3D impression is thus generated for the viewer.

Abstract: An imaging system having a front side and rear side enveloping a light transmitting space formed therebetween A front lens situated on the front side forms a portal through which light from an object enters into the light transmitting space wherein at least one optical element composed of glass or elastic material, liquid lenses or liquid crystal elements, and an image sensor are positioned to develop a folded beam path between the front lens and the image sensor, and a real image of the object on the image sensor. Electrically driving at least one optical element enables alteration of the focal length within the system in a manner switchable between at least two values. The change in focal length is realized with the aid of electrically controlled piezo-actuators or by an electric field applied to at least one variable optical element.

Abstract: A compact camera lens composed of the following five lenses in this sequence proceeding from the object side: a first positive meniscus lens, wherein the concave surface of the first positive meniscus lens faces away from the object side; a second negative lens, wherein the object-side surface of the second negative lens is concave; a third positive lens, wherein the image-side surface of the third positive lens is convex; a fourth biconvex lens; and a fifth negative lens. The fourth biconvex lens and the fifth negative lens are in each case cemented with one another. The object-side surface of the third positive lens and the image-side surface of the fifth negative lens are of aspherical form. The objective is particularly robust, compact, has a large aperture and very good imaging characteristics. It is suitable for example as an objective of an exterior mirror replacement camera in the automotive field.

Abstract: The invention relates to the field of 3D cinema projection using wavelength-division multiplexing. Three-dimensional color images are generated and viewed using a filter pair. Respectively differently pre-specified regions of the visible spectrum are filtered out by the two filters of the filter pair such that a plurality of delimited spectral intervals are transmitted in the blue, green and red domain of color perception. Here, the position of the transmitting intervals for the two perspective partial images is different. The respectively filtered-out regions are produced by absorption bands. The absorption bands here can be generated by a plurality of different colorants in the filter material. The filters can, for example, be disposed in glasses for viewing three-dimensional color images with two viewing openings for the eyes of an observer.

Abstract: An imaging system for imaging an object onto an image sensor, and which has a front side facing the object and a rear side facing away from the object, the rear side being arranged behind the front side as viewed from the object. Furthermore, the imaging system has a light entrance device at the front side through which light coming from the object can enter into the imaging system. In this case, the light traverses the beam path between object and image sensor. At least one first and one second optical element are likewise present and are arranged at the rear side in such a way that they can influence the beam path. The light entrance device has an electrically switchable liquid crystal element which deflects the beam path at at least one first angle and a second angle which is different from the first angle depending on the electrical switching state. A discretely switchable focal length change is realized by this electrically effected change in the beam path.

Abstract: A method for zero-contact measurement of the topography of a spherically or aspherically curved air-glass surface of an optical lens or lens combination, distinguished in that the surface (S1) to be measured is sampled on its glass rear side with an optical measurement beam through the air-glass surface (S2) lying before it in the measurement direction.

Abstract: The invention relates to an optical system for the projection of digital image data comprising a fixed focal length lens and a pivotable focal length extender. The principal field of application of the invention is digital cinema projection, usually employing the wide-screen format 1.9:1 or the Cinemascope format 2.37:1 (width:height). For format changeover during projection, two different fixed focal lengths are realized by the insertion or removal of the focal length extender (1755) into the lens. The projection lens according to the invention has more favorable optical properties than the conventional zoom lenses, such as a minimal chromatic transverse aberration, high telecentricity, very small distortions and a small volume and weight.

Abstract: A description is given of a macro objective (M) with a corrective compensation of aberrations (Continuous Aberration Suppression; CAS). The macro objective has a first positive optical subassembly (A), a second nearly afocal optical subassembly (B), a stop (APE), a third nearly afocal optical subassembly (B?) and a fourth positive optical subassembly (A?). The third optical subassembly (B?) and the fourth positive optical subassembly (A?) are designed with mirror symmetry relative to the optical subassemblies (A, B) upstream of the stop (APE). The nearly afocal optical subassemblies (B, B?) are displaced jointly inside the macro objective (M) along the optical axis (OA) with the aid of mechanical means in conjunction with linear magnifications of ????1. As a result, the macro objective (M) achieves outstanding imaging properties both over a wide range of linear magnifications (??=?2.0 to ?0.5) and over a wide wavelength spectrum.

Abstract: The invention relates to an optical system for the projection of digital image data comprising a fixed focal length lens and a pivotable focal length extender. The principal field of application of the invention is digital cinema projection, usually employing the wide-screen format 1.9:1 or the Cinemascope format 2.37:1 (width:height). For format changeover during projection, two different fixed focal lengths are realized by the insertion or removal of the focal length extender (1755) into the lens. The projection lens according to the invention has more favorable optical properties than the conventional zoom lenses, such as a minimal chromatic transverse aberration, high telecentricity, very small distortions and a small volume and weight.

Abstract: The invention relates to a projection objective with fixed focal length for digital projection, characterized by the following features: a first optical subassembly of several lenses seated in a first objective housing; a second optical subassembly of several lenses seated in a second objective housing; and a third objective housing that, in the region of one end, accepts the first objective housing, and in the region of the other end, accepts the second objective housing. Such an objective is designed to be structurally simple and makes possible a simple and precise assembly.

Abstract: A description is given of a macro objective (M) with a corrective compensation of aberrations (Continuous Aberration Suppression; CAS). The macro objective has a first positive optical subassembly (A), a second nearly afocal optical subassembly (B), a stop (APE), a third nearly afocal optical subassembly (B?) and a fourth positive optical subassembly (A?). The third optical subassembly (B?) and the fourth positive optical subassembly (A?) are designed with mirror symmetry relative to the optical subassemblies (A, B) upstream of the stop (APE). The nearly afocal optical subassemblies (B, B?) are displaced jointly inside the macro objective (M) along the optical axis (OA) with the aid of mechanical means in conjunction with linear magnifications of ????1. As a result, the macro objective (M) achieves outstanding imaging properties both over a wide range of linear magnifications (??=?2.0 to ?0.5) and over a wide wavelength spectrum.

Abstract: A projection objective having a fixed focal length for digital projection includes the following arrangement of the lenses in the sequence from the image (enlargement side) to the object (reduction and illumination side): a first, negative lens, a second, negative lens, a third lens, a fourth, positive lens, a fifth lens, a sixth, positive lens, a seventh, negative lens, an eighth, positive lens, and a ninth, positive lens. By means of such an objective, the quality requirements in the field of digital projection can be met with a minimal number of lenses.

Abstract: A projection lens with a short focal length and high initial aperture is proposed. Such projection lenses are used, for example, in cinema projection. The projection lens is configured such that the sum of the overall length and the back focus (12) is between 2.8 times and 4.5 times the total focal length f?. The entrance pupil is at a distance of between 100 mm and 300 mm from the last lens surface (62; 150), which faces the illuminating mirror. The minimum stop number k of the projection lens is 1.7, and the projection lens is therefore also suitable for illuminating mirrors with a high aperture angle (of up to 17°).