Abstract: A lamp and a method for generating high power in laser applications includes a source for emitting optical radiation along an optical path and a holder configured in the optical path having a fluorescent body. The lamp and method further include a collecting unit configured to transmit at least a portion of the optical radiation emitted by the fluorescent body to an output of the lamp. The fluorescent body includes a shape that is elongated in a predetermined direction. Accordingly, providing a small spot and little divergence in conjunction with good heat dissipation leads to a high optical performance.

Abstract: A lighting device includes a laser providing high brightness coherent light and a light scattering element having luminescent material adapted for converting part of the light from the laser into a different wavelength, and transmitting and scattering part of the light from the laser without conversion. The lighting device may be used as the a light source in a lamp bulb or other light emission device.

Abstract: There is provided a high brightness lighting device (10) comprising a laser (1) for providing high brightness coherent light and a light scattering element (2) arranged for receiving light from the laser. The light scattering element comprises luminescent material adapted for converting part of the provided light into a different wavelength. The light scattering element is further arranged to transmit and scatter part of the provided light without conversion. Thereby, upon receiving the coherent light, light being outputted from the light scattering element has a dual lighting effect, due to the outputted light comprising high brightness incoherent light originating from converted light providing a sparkle lighting effect, and coherent light providing a speckle lighting effect. Further, a corresponding lamp (30, 40) comprising such a lighting device is provided.

Abstract: The invention relates to a lamp and a method, preferably adapted for generating high power in laser applications. The lamp (1) comprises a source (3) adapted for emitting optical radiation along an optical path and a holder (5) comprising a fluorescent body (4), wherein the holder (5) is arranged in the optical path, a collecting unit (8) is provided which is adapted for transmitting at least a portion of optical radiation emitted by the fluorescent body (4) to an output of the lamp (1), and the fluorescent body (4) comprises a shape being elongated in a predetermined direction. In this way, a small spot and little divergence is provided in conjunction with good heat dissipation leading to a high optical performance.

Abstract: A multi-stack optical data storage medium (20) for rewritable recording using a focused radiation beam (30), entering through an entrance face (25) is described. The medium (20) has a substrate (1a, 1b) and an L0 recording stack (2) and an L1 recording stack (3) both comprising a phase-change type L0 and L1 recording layer and the recording stacks are separated by a transparent spacer layer (4). The L0 recording stack (2) is present at a position closest to the entrance face (25) and has an optical transmission of TL0a and TL0c when the phase-change layer respectively is in the amorphous phase and in the crystalline phase. The medium (20) contains pre-recorded information modulated in at least one of: an embossed pregroove (21) in the substrate (1a, 1b), embossed pits in the substrate and recorded phase-change marks in at least one of the recording layers L0 and L1 (6, 11).

Abstract: An optical device for scanning an optical record carrier (20) has a radiation source (25) that can emit two radiation beams of different wavelength along different optical paths (28, 29). The emitted radiation is focused on the record carrier and reflected back to a detection system (40). A beam combiner 43 is arranged in the optical path between the radiation source and the detection system for combining the two radiation beams on one optical path, thereby allowing the use of a single detection system for both radiation beams. The beam combiner includes a grating that passes one of the beams undiffracted and diffracts the other beam mainly in the first order. The profile of the grating lines show alternating slanting grooves and slanting lands.

Abstract: The rewritable data storage medium (1) has a rewritable recording layer (9) provided with a tracking structure (8). Said layer (9) has a data recording area (5). An erasable identification mark is present in an identification mark area (4, 4?) other than the data recording area (5). The data recording area (5) has a first tracking structure (8?), whereas the identification mark area (4, 4?) is substantially free from a tracking structure or has a second tracking structure (8?) substantially different from the first tracking structure (8?). Thus erasure of the identification mark is practically impossible, because the location of the erasing spot of a recorder cannot be controlled precisely in radial direction.

Abstract: The rewritable data storage medium (1) has a rewritable recording layer (9) provided with a tracking structure (8). Said layer (9) has a data recording area (5). An erasable identification mark is present in an identification mark area (4, 4′) other than the data recording area (5). The data recording area (5) has a first tracking structure (8′), whereas the identification mark area (4, 4′) is substantially free from a tracking structure or has a second tracking structure (8″) substantially different from the first tracking structure (8′).