Abstract: A laser sensor module includes a first laser source configured to emit first modulated light, the first modulated light being modulated laser light. The laser sensor module further includes circuitry configured to drive the first laser source with a first modulated driving current to cause the first laser source to emit the modulated laser light, a detector configured to detect the modulated laser light, which induces a photocurrent with variations resulting from modulation of the modulated laser light, and a second laser source configured to emit second modulated light. The circuitry is further configured to drive the second laser source with a second modulated driving current to cause the second laser source to emit the second modulated light. The detector is configured to detect the second modulated light. The circuitry is configured to adapt the amplitude of the second modulated driving current to induce a contribution to the photocurrent.

Abstract: A laser sensor module includes a first laser source configured to emit first modulated light, the first modulated light being modulated laser light. The laser sensor module further includes circuitry configured to drive the first laser source with a first modulated driving current to cause the first laser source to emit the modulated laser light, a detector configured to detect the modulated laser light, which induces a photocurrent with variations resulting from modulation of the modulated laser light, and a second laser source configured to emit second modulated light. The circuitry is further configured to drive the second laser source with a second modulated driving current to cause the second laser source to emit the second modulated light. The detector is configured to detect the second modulated light. The circuitry is configured to adapt the amplitude of the second modulated driving current to induce a contribution to the photocurrent.

Abstract: The invention describes an illumination device (100) for illuminating a three dimensional arrangement (250) in an infrared wavelength spectrum. The illumination device (100) comprises at least a first group of laser devices (110) comprising at least one laser device (105) and at least a second group of laser devices (120) comprising at least one laser device (105). The first and the second group of laser devices (110, 120) are adapted to be operated independent with respect to each other. The first group of laser devices (110) is adapted to emit laser light with a first emission characteristic and the second group of laser devices (120) is adapted to emit laser light with a second emission characteristic different from the first emission characteristic. The invention further describes a distance detection device (150) and a camera system (300) comprising such an illumination device (100).

Abstract: The invention describes an illumination device (100) for illuminating a three dimensional arrangement (250) in an infrared wavelength spectrum. The illumination device (100) comprises at least a first group of laser devices (110) comprising at least one laser device (105) and at least a second group of laser devices (120) comprising at least one laser device (105). The first and the second group of laser devices (110, 120) are adapted to be operated independent with respect to each other. The first group of laser devices (110) is adapted to emit laser light with a first emission characteristic and the second group of laser devices (120) is adapted to emit laser light with a second emission characteristic different from the first emission characteristic. The invention further describes a distance detection device (150) and a camera system (300) comprising such an illumination device (100).

Abstract: A trackball module is provided for connecting a trackball to an electrical device, comprising a trackball for being manipulated by hand, a sensor device for detecting a turning of the trackball, a support device for positioning the trackball in a use position, in which the trackball is exposed for being manipulated, and a rest position, in which the trackball is adapted for being received by the electrical device, and an operating direction, which is defined roughly by a line through the center of the trackball and the center of a manipulating surface of the trackball exposed for turning the trackball by hand in the use position.

Abstract: A controller for controlling the power of a laser that is used in determining the motion of an object includes a power source that is arranged to supply power pulses to the laser in response to a controller signal. The controller controls the generation of pulses during periods in which a reliable result can be obtained, by detecting the laser radiation that has interacted with pulses reflected from the object, in order to conserve power consumption. Further the power pulses include a heating pulse portion, which serves to stabilize the temperature of the laser and calibrate the laser so that a known lasing wavelength is generated.

Abstract: A method and system are provided for minimizing or optimising radial to vertical crosstalk (RVC) in an error signal in an optical record carrier reader is record carrier losed. Focus error offset values are applied to the reader. The radial to vertical crosstalk is determined after each focus error offset value is applied. The focus error offset value which minimizes or optimises the radial to vertical crosstalk is selected for use by the reader.

Abstract: A trackball module (10) is provided for connecting a trackball (12) to an electrical device (32), comprising a trackball (12) for being manipulated by hand, a sensor device (14) for detecting a turning of the trackball (12), a support device (34) for positioning the trackball (12) in a use position, where the trackball (12) is exposed for being manipulated, and a rest position, where the trackball (12) is adapted for being received by the electrical device (32), and an operating direction (28), which is defined roughly by a line through the center (26) of the trackball and the center (24) of a manipulating surface (22) of the trackball (12) exposed for turning the trackball (12) by hand in the use position, wherein the support device (34) is adapted to change the position of the sensor device (14) with respect to the trackball (12) so that the sensor device (14) is arranged mainly along the operating direction (28) for detecting the turning of the trackball (12) in the use position and that the sensor device

Abstract: A controller (7) is disclosed for controlling the power supply to a laser (3) that is used in determining the motion of an object (8). The controller comprises a power source (2) that is arranged to supply power pulses (10, 11) to the laser (3) in response to a controller signal. The controller (7) controls the generation of pulses to those periods in which a reliable result can be obtained, by detecting the laser radiation that has interacted with pulses reflected from the object (8), in order to conserve power consumption. Further the power pulses (10, 11) comprise a heating component (9), which serves to stabilize the temperature of the laser (3) and therefore calibrate the laser (3) so that a known lasing wavelength is generated.

Abstract: A method and system are provided for minimizing or optimising radial to vertical crosstalk (RVC) in an error signal in an optical record carrier reader is record carrier losed. Focus error offset values are applied to the reader. The radial to vertical crosstalk is determined after each focus error offset value is applied. The focus error offset value which minimizes or optimises the radial to vertical crosstalk is selected for use by the reader.

Abstract: A method of enhancing laser operating efficiency of a laser (50) for use in an optical data read and/or write device (10) is described. The method is distinguished in that it includes steps of: a) generating a pulse excitation signal having one or more sequences of pulses whose pulse frequency is substantially in a range of 50 MHz 250 MHz; and b) arranging for the one or more sequences of pulses to modulate excitation current through the laser (50), the pulses traversing a lasing threshold of the laser (50). The method is of benefit in that it is capable of enhancing operating efficiency of the laser (50), thereby either enabling the laser to be driven to generate more optical output or for reducing temperature rise occurring in the laser (50) when in operation.