Abstract: System for order-receipt processing of an eyeglass lens, including: a receiver configured to receive order data of eyeglass lens, to store a catalog of eyeglass lens classes, which each are defined by a fixed number of predetermined and freely selectable order parameters and differ from each other in the number of freely selectable order parameters, and to classify the order data on the basis of the catalog of eyeglass lens classes, a processor configured to process the order data, to store only the highest eyeglass lens classes of the catalog of eyeglass lens classes, to select one of the highest eyeglass lens classes, to match the order data to the selected highest eyeglass lens class, to generate a respective digital reproduction of the eyeglass lens based on a calculation model and the adapted order data, and a communication device connecting the receiver and the processor.

Abstract: An interferometer suitable for length measurements, comprising a laser light source, a beam splitter to divide light stemming from the laser light source into a measuring beam and a reference beam, and recombination means at which the reference beam being guided along a reference path and the measuring beam interfere. The measuring beam travels along a measuring path that leads over a movable measuring reflector and partly through a gaseous ambient medium. The interferometer further comprises photodetector means to analyze optical interference signals stemming from the recombination means. At least one static etalon of a known length is provided to determine or compensate for variable environmental conditions (variable refractive index) of the ambient medium. The etalon comprises two reflection surfaces and is illuminated by light stemming from the laser light source. The space lying inbetween these reflection surfaces is filled with the ambient medium.

Abstract: Device for stabilizing the wavelength in air of a laser diode for an Interferometer which measures length in waveguide technology. To stablize the wavelength in air, an interference phenomenon, according to Young, is produced and detected in an air chamber of constant and stable length with two point-shaped light waves of a coherent beam. The point-shaped light waves are formed by the ends of waveguides. The photo-detectors and the control device control the frequency of the laser diode so that the interference phenomenon, and therefore the wavelength in air, remain stable inside the reference chamber. The arrangement is simple and compact.

Abstract: Methodology, and associated circuitry, for encoding and decoding signals utilize bistate orthogonal code techniques that effect autonomy of communications and simplified signal processing, thereby improving reliability.Encoder (121) processes an incoming data stream by associating a bistate orthogonal code with each binary one in the input stream and then by transmitting a series of rate-increased pulses over a path during intervals determined by the code for each of the binary ones.Decoder (131), in synchronism with encoder (121), is generally arranged as a correlation detector in that the decoder only responds to the particular bistate orthogonal code for which it is configured. Sensors in energy transfer relation to the path are positioned at detection points on the path in correspondence to an assigned code.

Abstract: Methodology, and associated circuitry, for encoding and decoding signals utilize optimizing orthogonal code techniques that effect autonomy of communications and simplified signal processing, thereby improving reliability.Encoder (121) processes an incoming data stream by associating an optimizing orthogonal code with each binary one in the input stream and then by transmitting a series of rate-increased pulses over a path during intervals determined by the code for each of the binary ones.Decoder (131) is generally arranged as a correlation detector in that the decoder only responds to the particular optimizing orthogonal code for which it is configured. Sensors in energy transfer relation to the path are positioned at detection points on the path in correspondence to an assigned code. The outputs of the sensors are processed to produce a rate-decreased detected signal at the rate of the input stream whenever a rate-increased stream corresponding to the decoder configuration is propagating along the path.