Abstract: The lighting device includes a light source (12) and a reflector (10), which is provided with a reflecting surface (16) with a basic shape formed so that light generated by the light source (12) is reflected from the reflecting surface (16) as a light beam with a predetermined characteristic. The reflecting surface is provided with a wave structure superimposed on the basic form and including alternating successive scattering wave sections (32; 42) and concentrating wave sections (34; 44). The extent (b) of the scattering wave section (32) perpendicular to the surface lines (33) is substantially larger than the extent (c) of the concentrating wave sections (34) perpendicular to the surface lines (35). Because of the wave structure the light beam reflected by the reflecting surface is scattered and made uniform.

Abstract: The lighting device includes a light source (12) and a reflector (10), which is provided with a reflecting surface (16) with a basic shape formed so that light generated by the light source (12) is reflected from the reflecting surface (16) as a light beam with a predetermined characteristic. The reflecting surface is provided with a wave structure superimposed on the basic form and including alternating successive scattering wave sections (32;42) and concentrating wave sections (34; 44). The extent (b) of the scattering wave section (32) perpendicular to the surface lines (33) is substantially larger than the extent (c) of the concentrating wave sections (34) perpendicular to the surface lines (35). Because of the wave structure the light beam reflected by the reflecting surface is scattered and made uniform.

Abstract: A headlight for vehicles said a light source; a reflector which reflects a light emitted by the light source so that a horizontal dispersion is provided, the reflector having a reflection surface which has at least two facets adjoining one another in a horizontal direction and bordering in a separating line, the separating line in a central plane of the reflector which contains an optical axis having at least approximately vertical tangent, the separating line having a course which deviates from a vertical so that regions of two adjoining facets located at least approximately in a joint horizontal plane near its separating line produce images of the light source which are arranged in a vertical direction at least approximately at a same height.

Abstract: A low beam headlight for motor vehicles has a reflector having an optical axis and a light outlet opening, a light body, a light disc covering the light outlet opening of the reflector, the reflector having an upper region and a lower region having different reflection surfaces which have different shapes and at least partially form a portion of at least approximately general paraboloid and which reflect images of the light body for forming a light distribution with a light-dark limit having a substantially horizontal portion and a portion which is inclined relative to the substantially horizontal portion at an angle .alpha.

Abstract: The apparatus for control of a light-range of headlights of a motor vehicle includes two headlight orientation adjusting devices; at least one electro-optic sensor detecting actual values of light intensities of light reflected from an illuminated portion of the road; and an analyzer/control unit connected to the at least one electro-optic sensor and the adjusting devices to control the adjusting devices and the headlight orientation according to the sensor signal.

Abstract: An optical depth measuring device for use with a drilling power tool for drilling a bore in a workpiece and comprising a radiation source for projecting an optical pattern onto a surface of the workpiece, a radiation receiver for receiving an image reflected from the surface of the workpiece, a conveying lens located in front of the radiation receiver for directing the reflected image and signal processing means for continuously determining the depth of the drilled bore in accordance with the image received by the radiation receiver.

Abstract: A headlight arrangement for vehicles, particularly for power vehicles, comprises a light source with a light reflector forming a light beam which illuminates a roadway with a predetermined light distribution, and at least one adjustable element for changing the light distribution.

Abstract: An antidazzle headlamp has a reflector which is asymmetric relative to a horizontal plane passing through an optical axis of the reflector. The contours of the reflector corresponding to vertical sections in parallel planes forming right angles with a horizontal plane passing through the optical axis, form an upper and a lower half ellipse. Both half ellipses in each vertical section have a common large axis which is staggered upward relative to the horizontal plane. In this manner an antidazzle light beam is created which guarantees an intensive and complete illumination of edges of a roadway even at a close range from the motor vehicle.

Abstract: Small reference marks near two corners of a circuit chip in the form of optical gratings in which the grating lines of both reference marks are parallel are illuminated alternately by a laser beam which is projected in the location the reference marks would have if the chip is properly located. Detectors are arranged to pick up the first secondary maximum of each diffraction pattern when the chip is properly located on its carrier plate. Failure of the detectors to respond indicates a chip that must be removed. With a beam-splitting arrangement producing four closely bunched light spots, straddling each of the reference marks, and an appropriate number of detectors, directional error signals are obtainable by which mechanical correction movements can be controlled for automatic localization of the chip.

Abstract: To reduce the size of the beam spot of a laser beam, a four-element lens having the characteristics set forth in the table forming part of the specification, is used, thereby providing a large-aperture objective with a field being about 2.degree., coma corrected and with low image field convexity.

Abstract: To prevent spurious distortion of the image upon mechanical distortion of a cross slide upon movement of the cross slide, a slide carrier is arranged to support the objects to be compared in superposed relation; a microscope optic and deflection optics form superimposed images of the respective objects, the microscope optics including two channels which have objective planes parallel to the imaging planes for measuring the objects. In accordance with the invention, the focal length of the microscope objective in one channel is equal to one-half the distance of the superimposed corresponding elemental areas of the objects to be compared, the optic generating an image of the areas to be compared which is at, or close to infinity. A plane mirror is rigidly connected to the carrier, the mirror plane thereof extending parallel to the imaging planes, so that small rotary distortion of the carrier will not interfere with congruence of corresponding elemental areas.