An energy discriminator is provided wherein energy, entering through a receiving surface into a multilayer semiconductor monocrystalline body is converted into hole-electron pair carriers in different particular energy responsive layers and the electrons thereof are collected in potential wells that are asymmetric to electron flow associated with the particular layer.

An apparatus for detecting the defects composed of non-linear components of a subject pattern, includes a laser source for illuminating the subject pattern by a laser beam, a Fourier-transform lens for projecting an information light from the pattern through a spatial filter onto a screen. The filter is placed on the Fourier-transform plane of the Fourier-transformed information light for intercepting the coherent light having information of the linear components, the filter having arm sections ...

A system for achieving very uniform illumination of a target. A beam of broadband spatially-coherent light is converted to light with a controlled spatial incoherence and focused on the target. An echelon-like grating breaks the beam up into a large number of differently delayed beamlets with delay increments larger than the coherence time of the beam, and a focusing lens overlaps the beamlets to produce at the target a complicated interference pattern modulated by a smooth envelope that charact...

An improved spatial filter for operation with high power laser beams is provided wherein a first gas flow system and a second gas flow system cooperate to enclose a cavity therebetween capable of accommodating a filter having an aperture located therein for spatially filtering the beam. The first and second gas flow systems are adapted for providing a first aerodynamic window across a beam entrance and a second aerodynamic window across a beam exit to maintain a selected gas pressure within the ...

The invention relates to the connection networks used for switching digital signals, more especially telephonic PCM signals. It consists in organizing the spatial stage of a network of the TST type operating in series mode so as to divide into two the number of switching planes of that network. Each plane is with blocking although the assembly is without blocking. Moreover the number of time paths that enables the spatial stage to be traversed is doubled.

A spatial filtered Q-switched laser system is disclosed having means to prevent ionization of air in close proximity to the aperture of the spatial filter. A compound lens system having an astigmatic focus is disposed between the laser and the spatial filter for defocusing the light beam emanating from the laser in the vicinity of the aperture of the spatial filter to an intensity below that which produces ionization of air. The preferred construction of the compound lens system as viewed from t...

An audio system comprising a record player, tape deck, microphones, or other signal source which generates stereo signals supplied to two main speakers for reproduction; the stereo signals are added together to afford an intermediate signal which is subjected to at least two successive equal delays to generate a plurality of delayed signals which are summed with the intermediate signal in predetermined amplitude and phase relation to generate a spatial effect signal that is essentially free of n...

A skeleton monolithic structure and method of assembly thereof employing the maxim of providing in that each beam of the structure in the longitudinal and transverse directions thereof, is divided into two channel-forming parts, thus providing ample space for the free threading of steel cables in order to effect the prestressing. The straight-line or linear cables run through the thus formed longitudinally and transversely extending channels, while in the locations for columns they are pulled th...

A device for determining the spatial position of an object (11) including a plurality of sources (A1, A2, B1, B2, C) emitting beams of the polarized light in different directions and disposed on the object and a plurality of stationary detection devices (21, 22, 23), each having means for measuring the angular orientation of the direction of polarization of a beam of polarized light which they receive relative to a corresponding reference direction. At least two of the sources (A1, B1) emit beam...

A photosensing device is provided in which selective doping of the semiconductor substrate of the device produces electric fields in the substrate which accelerate photogenerated charge carriers toward or away from the surface of the device. The probability of detection of change carriers by photosensing elements remote from the region of carrier photogeneration is thereby reduced.