Abstract: A method for testing the die-attach quality of a photovoltaic cell assembly, in particular, for electrical inline monitoring of a photovoltaic cell die-attach quality during the manufacturing of a concentrator photovoltaic module, comprises the steps of providing a photovoltaic cell assembly comprising at least one photovoltaic cell, in particular, a concentrator photovoltaic cell, attached to a heat sink, injecting a current into the photovoltaic cell assembly, measuring the voltage across the photovoltaic cell during the current injection, and determining the relative voltage drop over the duration of the current injection, whereby insufficiently bonded photovoltaic cell assemblies can be identified and screened.

Abstract: The present invention relates to a method for testing the die-attach quality of a photovoltaic cell assembly, in particular, for electrical inline monitoring of a photovoltaic cell die-attach quality during the manufacturing of a concentrator photovoltaic module. The method comprises the steps of providing a photovoltaic cell assembly comprising at least one photovoltaic cell, in particular, a concentrator photovoltaic cell, attached to a heat sink, injecting a current into the photovoltaic cell assembly measuring the voltage across the photovoltaic cell during the current injection and determining the relative voltage drop over the duration of the current injection, whereby insufficiently bonded photovoltaic cell assemblies can be identified and screened.

Abstract: Reduction of data packet losses on updating of an address table, stored in a computer of a local network is provided. The address table comprises allocations of computer addresses, valid in the local network, to computer addresses valid in the Internet for transmission of data packets, whereby an address allocation stored in the address table is erased after expiry of a validity timer and the address allocation is firstly requested again and inserted in the address table when a data packet is transmitted to an address internet-valid address of a computer in the local network. During the updating of the address allocation, data packets for transmission are buffered in a buffer memory, the size of the buffer memory being configured corresponding to the expected load of the local network. The size of the buffer memory matches the expected load on the local network.

Abstract: A circuit assembly and an associated method are provided, which allow a user to autonomously influence the quality of the data that is to be transmitted, especially language data that is to be transmitted via the IP network, by controllingly addressing an adjusting unit via an evaluator and signalor when a selected coder-decoder is to be used.

Abstract: Reduction of data packet losses on updating of an address table, stored in a computer of a local network is provided. The address table comprises allocations of computer addresses, valid in the local network, to computer addresses valid in the Internet for transmission of data packets, whereby an address allocation stored in the address table is erased after expiry of a validity timer and the address allocation is firstly requested again and inserted in the address table when a data packet is transmitted to an address internet-valid address of a computer in the local network. During the updating of the address allocation, data packets for transmission are buffered in a buffer memory, the size of the buffer memory being configured corresponding to the expected load of the local network. The size of the buffer memory matches the expected load on the local network.

Abstract: In one aspect, a method for preventing data packet losses when updating of an address table that is stored in a computer of a local area network and comprises allocations of computer addresses valid in the local area network to computer addresses valid in the Internet to mail data packets is provided. Accordingly, an address allocation stored in the address table is updated after an expiration of a timer. The computer requests the computer address valid in the local area network regarding the available computer address valid in the Internet for the address allocation. The determined computer address valid in the local area network is entered into the address allocation and the marking for the address allocation is cleared. Thus, an address allocation available is kept even when the address allocation is updated, resulting in preventing data packet losses and maintaining the quality of the local area network.

Abstract: In an electrodynamic actuator for an optical write-in or read-out unit (11), which is aligned with respect to signal tracks of a storage medium in order to direct a focused light beam (13) onto a work position, the actuator includes an optical unit (11) is arranged on a movable permanent magnet arrangement (5, 5a) which can be moved by means of stationary coils (17a, 17b, 19a, 19b) located in its vicinity in focusing (z) and radial (x) directions running perpendicular to one another, the coils being located in the radial direction (x) on both sides of the permanent magnet arrangement (5, 5a), and the magnetization of the permanent magnet arrangement being chosen in such a way that its magnetic field in the region of coils (17c, 17d, 19c, 19d) opposite to it has both an x component and z component, the permanent magnet arrangement (5, 5a) with the optical unit (11) in the magnetic field of the coils is arranged at the free ends of spring rods (3) clamped at one end, and the spring rods (3) of the permanent mag

Abstract: An electrodynamic actuator for optical storage systems comprising an electromechanical actuating device which is constructed to move an optical write and/or read unit into write or read operating positions relative to a storage medium, comprising a linear motor which comprises spaced apart parallel stator sections, which are constituted by rod-shaped stator iron elements carrying induction coils which are stationary relative to the stator, a permanent magnet being arranged between said stator sections and being guided to be longitudinally movable in a direction of translation between the axial ends of the stator sections. The permanent magnet carries the optical system of the optical unit and has a magnetic field which is oriented perpendicularly to the direction of translation and parallel to a central plane in which the stator irons, the induction coils and the permanent magnet itself are arranged.

Abstract: An optical scanning unit with an objective for the focussing a beam of radiation along an optical axis into a scanning spot on the surface of an information carrier. The scanning unit also has an electromagnetic drive for correcting the position of the objective with respect to the information carrier. The drive has an objective mount supported in an annular, moving magnetic member which is axially magnetized and is arranged coaxially about the optical axis. The drive is further provided with fixed coils which interact with the magnetic member via an air gap. The fixed coils are arranged along at least three radial planes which are normal to the optical axis. Two planes lie in the area of the axial ends of the centrally positioned magnetic member and the third central plane which extends between the two outer radial planes.

Abstract: An optical scanning unit with an objective for focussing a beam into a scanning spot on the surface of an information carrier and an electromagnetic drive for continuous correction of the position of the objective with respect to the information carrier. The objective is mounted in a movable ring-shaped magnetic body of a permanent-magnetic material which is arranged coaxially about the optical axis and which has magnetic poles at the axial ends. The drive is provided with sets of fixed coils which interact with the magnetic body via an air gap. Each set of coils has a first segmental coil arrangement having two active coil parts extending parallel in the peripheral direction of the magnetic body and located in the vicinity of the axial ends of the centrally positioned magnetic body. The unit is further equipped with at least one second coil arrangement which is positioned at least partially between the active coil parts of the above-mentioned first segmental arrangement.