Abstract: An optical mount (1) for optical component (2) which has a edge contour (4) relative to extending radially optical axis (A), includes a rigid optical support (3) having an axially oriented stop edge (5), which is suitable for an axial contact with the optical component (2), and at least one flexible spring element which is arranged radially outside the stop edge (5), extends axially on the component side and is curved radially inward. The radial spring element passes at an axial distance from the stop edge into a circumferentially closed jacket sleeve an inner contour (8) of which extends farther radially than the edge contour (4) of the optical component (2).

Abstract: A device (1) for generating and projecting light marks (MP, ML) in which projection optics (P) have a cylindrical lens (Z). The cylindrical lens (Z) can be irradiated by a light beam bundle (L2) such that a central beam bundle (L2Z) radiates completely through a cylinder portion area (A) and at least one marginal beam bundle (L2R) travels directly past the edge of the outer surface of the cylinder portion area (ZA). A light mark (ML) in the shape of a line is projected by the central beam bundle (L2Z), while a light mark (MP) in the shape of a point is projected through the marginal beam bundle (L2R).

Abstract: An optical beam splitter (1) for a light beam (2) that is parallel along a beam axis (A) has a transparent central area (3) and a plurality of reflecting reflector surfaces (4a, 4b) that are respectively inclined by a reflector angle (?) relative to the beam axis (A) for generating each a discrete spot beam (5a, 5b), with the central area (3) being convexly curved in the manner of a prism at least in part and/or has beam-expanding diffractive optics (19).

Abstract: A device (1) for generating and projecting light marks (MP, ML) in which projection optics (P) have a cylindrical lens (Z). The cylindrical lens (Z) can be irradiated by a light beam bundle (L2) such that a central beam bundle (L2Z) radiates completely through a cylinder portion area (A) and at least one marginal beam bundle (L2R) travels directly past the edge of the outer surface of the cylinder portion area (ZA). A light mark (ML) in the shape of a line is projected by the central beam bundle (L2Z), while a light mark (MP) in the shape of a point is projected through the marginal beam bundle (L2R).

Abstract: An apparatus for reading from and/or writing to optical recording media on which data markings are arranged along tracks arranged next to one another. The apparatus according to the present invention comprises a light source, a focusing means and an intensity distribution converter. In the present invention, both the extent of the focus spot of the primary beam is reduced and the disadvantages occurring due to the secondary beams are reduced. In an exemplary embodiment, the intensity distribution converter comprises a filtering strip arranged in the region of the focusing means.

Abstract: The present invention relates to a device for reading from and/or writing to optical recording media having a scanning unit, which is equipped with at least two detector units each having a plurality of detector elements, and also an evaluation unit, each of the detector elements being connected to the evaluation unit by means of a line. The object of the present invention is to simplify the structure of a device of this type. This object is achieved by virtue of the fact that detector elements of different detector units are each connected to the evaluation unit via a single line. The device according to the invention is advantageously a device which can read from and/or write to not only optical recording media which correspond to a CD standard but also those which correspond to a DVD standard.

Abstract: A multiple axis laser emitter (1) comprising an optical beam splitter (4) having at least two reflectively coated mirror surfaces (7a, 7b, 7c, 7d) oriented perpendicular to each other and each oriented at an angle of 45° to a collimated main beam (H) of a laser light source (6) and at an angle of 90° to each other, wherein, in the beam path, an optical wedge (8a, 8b, 8c, 8d, 8e) is arranged downstream to at least one of the component beams (Ta, Tb, Tc, Td) deflected by the mirror surfaces (7) at an angle of 90° to the main beam (H).

Abstract: The present invention relates to an apparatus for reading from and/or writing to optical recording media with optical scanner, light source, focusing means, tilting-detection device and tilting-compensation device. The object of the invention is to propose an apparatus and a method, which enables optimum compensation of tilting using as few apparatus functions as possible. This is achieved according to the invention by using a tilting-detection device comprising an optical grating, a detector element, a control device for controlling light source and the focusing means and a control device controlling for the tilting-compensation device.

Abstract: A device for reading from and/or writing to optical recording media 10, on which information is present in the form of pits, with a linearly polarized light beam 2.

Abstract: The present invention relates to a device for reading from or writing to optical recording media, which device has a scanning beam generation means, a focusing means and a photodetector comprising at least two detector zones and serving to receive zeroth- and first-order diffraction beams from the recording medium. The object of the invention is to obtain a reduction in interfering influences in a signal derived from signals of the photodetector, a signal such as, for example, a focus error signal or a track error signal. This object is achieved by virtue of the fact that a beam splitting means is provided, which splits a light spot falling onto the photodetector into two separate partial spots. The device is, for example, a CD or DVD player, but in particular a recording and reproduction device for so-called DVD-RAMs or similar optical recording media.

Abstract: An optical alignment apparatus including a beam splitter (2) for diverging a primary laser beam (4) emitted by a radiation source (5) into a plurality of divergent beam portions (3a, 3b, 3c, 3d, 3e), and elements for minimizing the angle error of the divergent beam portions (3a, 3b, 3c, 3d, 3e) and including a collimator (6) located between the radiation source (5) and the beam splitter (2), and a spacially oscillatingly adjustable, transparent, plane-parallel plate (7) arranged in a path of the primary laser beam (4).

Abstract: A multiple axis laser emitter (1) comprising an optical beam splitter (4) having at least two reflectively coated mirror surfaces (7a, 7b, 7c, 7d) oriented perpendicular to each other and each oriented at an angle of 45° to a collimated main beam (H) of a laser light source (6) and at an angle of 90° to each other, wherein, in the beam path, an optical wedge (8a, 8b, 8c, 8d, 8e) is arranged downstream to at least one of the component beams (Ta, Tb, Tc, Td) deflected by the mirror surfaces (7) at an angle of 90° to the main beam (H).

Abstract: A device for reading from or writing to optical recording media comprising a scanning beam generation means, a focusing means and a photodetector comprising at least two detector zones and serving to receive zeroth- and first-order diffraction beams from the recording medium. The object of the invention is to obtain a reduction in interfering influences in a signal derived from signals of the photodetector, a signal such as, for example, a focus error signal or a track error signal. This object is achieved by virtue of the fact that a beam splitting means is provided, which splits a light spot falling onto the photodetector into two separate partial spots. The device is, for example, a CD or DVD player, but in particular a recording and reproduction device for so-called DVD-RAMs or similar optical recording media.

Abstract: The present invention relates to a device for reading from or writing to optical recording media, which device has a scanning beam generation means, a focusing means and a photodetector comprising at least two detector zones and serving to receive zeroth- and first-order diffraction beams from the recording medium.

Abstract: An optical alignment apparatus including a beam splitter (2) for diverging a primary laser beam (4) emitted by a radiation source (5) into a plurality of divergent beam portions (3a, 3b, 3c, 3d, 3e), and elements for minimizing the angle error of the divergent beam portions (3a, 3b, 3c, 3d, 3e) and including a collimator (6) located between the radiation source (5) and the beam splitter (2), and a spacially oscillatingly adjustable, transparent, plane-parallel plate (7) arranged in a path of the primary laser beam (4).

Abstract: The present invention relates to a device for the reading and/or writing of optical recording media [(AT)] of various structures, which device operates with a single objective lens [(OL)]. The invention proposes to use a diaphragm varying in diameter, in particular a polarizing filter arranged in the optical path in order to adapt the aperture to each type of optical recording medium [(AT)] used. The wavefront can be corrected using a divergent lens [(SL)] which can also be positioned in the beam path. The Diaphragm formed by the polarizing filter PF is linked to the objective lens [(OL)]. The field of application of the invention relates to, in particular, devices for reading and/or writing optical recording media [(AT)] of various structure such as compact discs and digital video discs.

Abstract: The present invention relates to a device for reading from and/or writing to optical recording media having a scanning unit, which is equipped with at least two detector units each having a plurality of detector elements, and also an evaluation unit, each of the detector elements being connected to the evaluation unit by means of a line.

Abstract: A dual wavelength optical pickup head in which as many same parts as possible are used as well to direct light beams incident than light beams reflected from a reflective layer of an optical disk. The reuse of as many parts as possible allows to and a second wavelength emitted by a first and a second light source to an optical disk, a dual focus lens objective for focusing said light beams on a layer of said optical disk and a single detector which allows to detect light beams of either said first or said second wavelength.

Abstract: A device for writing to and/or reading from optical recording media having different structures is described, for example, a device which is suitable both for writing to/reading from digital videodisks (DVD) and conventional CD's. Provision is made for measuring the intensity of each peak in the mirror signal while the objective lens is moving to the recording medium. The intensity e.g. at the instant of the positive-negative crossing of the focus error signal is taken in this case. The type of optical recording medium is determined from the time characteristic and/or the height distribution of the peaks. In order to identify the type of optical recording medium, different properties of the optical recording medium are taken into account, such as reflectivity of the corresponding reflective surface, reduced intensity modulation due to spherical aberration, time characteristic and the like.

Abstract: The present invention relates to a recording or replay device, and to a method for recognizing a focussing status. The object of the invention is to provide a method of this type and a recording or replay device, with the facility of producing significant astigmatism in the reflected light beam (15) simply and cost-efficiently without elaborate alignment. This object is achieved by the use of a birefringent element (23, 24). The invention is, in particular, suitable for use in a recording or replay device for writing to or playing back optical recording media (11) such as CDs, video discs, DVDs and the like.