59 results about "Germanium crystal" patented technology

Devices for improving the capturing and utilization of high-energy electromagnetic radiation, for example, x-rays, gamma rays, and neutrons, for use in physical, medical, and industrial analysis and control applications are disclosed. The devices include optics having a plurality of optical crystals, for example, doubly-curved silicon or germanium crystals, arranged to optimize the capture and redirection of divergent radiation via Bragg diffraction. In one aspect, a plurality of optic crystals having varying atomic diffraction plane orientations are used to capture and focus divergent x-rays upon a target. In another aspect, a two- or three-dimensional matrix of crystals is positioned relative to an x-ray source to capture and focus divergent x-rays in three dimensions.

A portable radiation detector using a high-purity germanium crystal as the sensing device. The crystal is fabricated such that it exhibits a length to width ratio greater than 1:1 and is oriented within the detector to receive radiation along the width of said crystal. The crystal is located within a container pressurized with ultra-pure nitrogen, and the container is located within a cryostat under vacuum.

Method for limiting amount of radiation impinging on a radiation-sensitive detector device by directing radiation toward the detector, permitting the radiation to impinge upon the detector device when the radiation is below a predetermined threshold, and utilizing radiation having wavelengths different from signals of interest to initiate limiting of the radiation impinging upon the detector when the predetermined threshold is exceeded. The optical limiter includes an IR limiting layer pair selected so that energy from visible and near infrared radiation activates the optical limiter. The limiting layer pair may includes a layer closer to the source of radiation of e.g. vanadium dioxide, vanadium sesquioxide, or germanium crystal and a layer further from the source of radiation of e.g. chalcogenide glass, germanium crystal, or sodium chloride crystal.

A measurement control system for diameter of Czochralski grown monocrystalline germanium is characterized by comprising a camera, an image processor and an automatic control unit, the camera acquires images of equal-diameter growth of monocrystalline germanium, an image processor recognizes the position of an aperture of a solid-liquid interface and calculates curvature radius of the aperture of the solid-liquid interface to allow for equal-diameter growth of monocrystalline germanium by the automatic control unit. The measurement control system for diameter of Czochralski grown monocrystalline germanium has the advantages that an image processing card only analyzes an aperture part of acquired images, data transmission quantity is reduced, and the requirement of the system for hardware performance is reduced. Complex mapping from ellipse to circle is not required, and equal-diameter control can be achieved according to a change rule of the curvature radius only by acquiring the curvature radius of a specified point. The camera can integrally transmit the acquired growth images of monocrystalline germanium for image processing and analyzing, and accordingly multiple devices are convenient to monitor in real time by a production operator and labor strength of growth of monocrystalline germanium is lowered. The existing devices can be utilized to the maximum limit, and repeated design and investment of an electrical control system are avoided.