Abstract: Material for a dental prosthesis consisting of fiber glass reinforced plastic. The material is used to produce a blank by means of a special injection-molding process, which can be worked by means of a machining process. A method and a device for determining the shape of a duplicate of a remaining tooth area to be provided with a dental prosthesis. The shape of the duplicate is determined, as is the shape of duplicate sections into which the duplicate has been divided, the determined data are stored and combined. A method and arrangement for producing a dental prosthesis. The shape of a duplicate (42) of a remaining tooth area to be provided with the dental prosthesis is determined by means of a shape determination device (110), the determined data are stored in the form of digital data (DD), and the dental prosthesis (143) is produced in a production machine (114), which is controlled by means of production data (FD).

Abstract: A lightweight, breathable garment which has radiopaque qualities and a method for making the radiopaque garment. In a preferred embodiment, a lightweight fabric, such as a cloth surgical mask liner (24) or an entire surgical mask (10), is impregnated with a lightweight radiopaque compound, such as a barium sulfate compound, to impart radiopaque qualities. Impregnation of the lightweight radiopaque compound can be performed in any number of ways including soaking the fabric in a solution containing the lightweight radiopaque compound, using the fabric as a filter in a passing solution of the lightweight radiopaque compound, placing the fabric in a reaction chamber between reagent solutions whose interaction will form the lightweight radiopaque compound and impregnating the fabric with one reagent and then exposing it to a complementary reagent whose reaction with the first reagent will form a lightweight radiopaque compound.

Abstract: The invention relates to devices for the quantum-optical amplification of modulated light, in particular in optical free-space communications systems. In the process a light beam (4) is conducted through a plurality of adjoining crystals (66), (68), (70), which are delimited from each other by means of polarization-selectively reflecting layers (104), (106). The light beam (4) is repeatedly reflected at the edge areas of the crystals into quarter-wave plates (86), (88), (90), (92), (94), and in the process its polarization is respectively rotated by 90 degrees.

Abstract: In order to achieve a considerable reduction of the outlay required on the ground in connection with the accurate calculation of the exact orbital position of each individual satellite of a constellation, first the exact orbital position of a preferably central master satellite of a sub-group of satellites embodied as a special formation is determined. This calculation is performed autonomously on board the satellite by means of customary measurements supported from the ground, or respectively by means of GPS, MANS, etc. Then the exact position of all other satellites in the same formation is determined from range and pointing data, which are provided by each IS link terminal. These pointing data are well known after the establishment of the inter- satellite link and are continuously updated.

Abstract: A soldier carries a weapon on which a laser device (1) is mounted, which is used for illuminating a harness device (6) on the body of another soldier. This harness device is provided with sensors (61, 62, 63, . . . ), which perform detection tasks for several applications in connection with arbitrary simulation scenarios in the course of exercises and battles. The laser device (1) has a laser target illumination element which is designed for transmitting tightly bundled laser beams (11), as well as chopper means for transmitting laser beams which are not only coded, but also chopped at a predeterminable frequency. The sensors contain tuning means for obtaining an alternating electrical signal from the received chopped laser beams, which is supplied to a pre-amplifier connected upstream of a discriminator. A very sensitive laser identification system results due to the fact that the electrical signal obtained in this manner can be very strongly amplified.