Abstract: The invention describes a laser sensor module (100) which is adapted to detect or determine at least two different physical parameters by means of self-mixing interference by focusing a laser beam to different positions. Such a laser sensor module (100) may be used as an integrated sensor module, for example, in mobile devices (250). The laser sensor module (100) may be used as an input device and in addition as a sensor for detecting physical parameters in an environment of the mobile communication device (250). One physical parameter in the environment of the mobile communication device (250) may, for example, be the concentration of particles in the air (air pollution, smog . . . ). The invention further describes a related method and computer program product.

Abstract: The invention describes a laser sensor module (100) for particle density detection. The laser sensor module (100) comprising at least one first laser (110), at least one first detector (120) and at least one electrical driver (130). The first laser (110) is adapted to emit first laser light in reaction to signals provided by the at least one electrical driver (130). The at least one first detector (120) is adapted to detect a first self-mixing interference signal of an optical wave within a first laser cavity of the first laser (110). The first self-mixing interference signal is caused by first reflected laser light reentering the first laser cavity, the first reflected laser light being reflected by a particle receiving at least a part of the first laser light. The laser sensor module (100) is adapted to reduce multiple counts of the particle. The invention further describes a related method and computer program product.

Abstract: The invention describes a laser sensor module (100) for particle size detection. The laser sensor module (100) comprises at least one first laser (110), at least one first detector (120), at least one electrical driver (130) and at least one evaluator (140). The first laser (110) is adapted to emit first laser light in reaction to signals provided by the at least one driver (130). The at least one first detector (120) is adapted to determine a first self -mixing interference signal (30) of an optical wave within a first laser cavity of the first laser (110). The first self-mixing interference signal (30) is caused by first reflected laser light reentering the first laser cavity, the first reflected laser light being reflected by a particle receiving at least a part of the first laser light.

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 method and recording device for recording marks in a phase-change type record carrier uses increased cooling period between pulses in a sequence of write pulses by applying m write pulses, where m is depended on n/? (? being an integer larger than 1). The number of write pulses m may be set to the integer value closest to n/?.

Abstract: A device and method of recording marks representing data in an information layer of a record carrier includes irradiating the information layer by a pulsed radiation beam, each mark being written by a sequence of pulses. The recorded marks are erasable by irradiating the information layer with an erase radiation beam. The erase radiation beam has a first erase power level (e1) for a first erase period (t1), a second erase power level (e2) higher than or equal to the first erase power level (e1) for a second erase period (t2) , and a third erase power level (e3) lower than the second erase power level (e2) for a third erase period (t3).

Abstract: The present invention relates to determining at least one write strategy, using a write strategy model comprising first and second parameters, for recording data on a recording medium comprising, providing at least one set of randomised first parameters, (102, step 202), writing at least one test data, 104, pattern by using said at least one set of first randomised first parameters, (102), (106, step 204), reading the recorded test data pattern, (108, step 206) and calculating a set of second parameters, (114),(112, step 208), based on said read test data pattern (110) and the at least one set of first randomised parameters, (102). From the calculated set of second parameters, (114) and the real data to be recorded, 118, sets of first parameters (120) are calculated, (step 210). The real data (118) are recorded (122, step 212) by using the chosen write strategy model.

Abstract: The invention relates to a method and to a recording device for recording marks in a phase-change type record carrier. Generally, a nT marks is recorded by a sequence of (n−2) or (n−1) write pulses. In slow cooling stacks, this results in low quality marks. The invention proposes to increase the cooling period in between the pulses in a sequence of write pulses by applying m write pulses, where m is depended on n/&agr; (&agr; being an integer larger than 1). In an embodiment, the number of write pulses m is set to the integer value closest to n/&agr;. In an preferred embodiment &agr; is set to 3.