CRYOGENIC-VACUUM PLANT Russian patent published in 2019 - IPC B64G7/00 G01M11/00 

FIELD: physics.

SUBSTANCE: invention relates to optoelectronic, optomechanical and cryogenic-vacuum technology and is intended for accurate radiometric calibration, research and testing of optoelectronic and optomechanical devices (apparatuses), as well as of the radiation cooling systems under the conditions of vacuum, low background thermal radiation and under the conditions simulating outer space. Cryogenic vacuum unit contains the vacuum chamber with cryogenic radiation shields, the oil-free vacuum pumping system, instrumentation and the centralized equipment control system. Exemplary radiators, mirror projection systems and systems of their spatial positioning are located inside the chamber; the case of the vacuum chamber is made in the form of a rectangular parallelepiped with stiffening ribs on the walls of the housing, which ensure the necessary strength; the oil-free vacuum pumping system is a high-vacuum two-level system equipped with magnetic-suspension turbo-molecular pumps and cryogenic pumps installed directly on the side wall of the vacuum chamber, as well as high-vacuum closures separating the volume of the chamber and the inlet flange of each pump; the design of the vacuum chamber provides for the placement inside it of the recurrent system of turning the tested equipment around the vertical axis in the form of a suspension or table that rotates the equipment 360° and back at a given speed; the camera can also be equipped with the device that simulates solar radiation in the working range of the spectrum, the vacuum flange in the side wall of the vacuum chamber providing hermetic attachment to the camera. Inside the working volume of the vacuum chamber the cryogenic panels are placed that simulate the radiative properties of deep space, intended for testing and research of the radiation cooldown space systems, as well as to simulate the radiation of space using the appropriate radiometric calibration of the equipment in space.

EFFECT: improved accuracy of radiometric calibration and monitoring of the characteristics of the equipment, expanding of the types of measurement modes and tests, as well as improving the efficiency of manufacturing processes of the vacuum chamber and creating high vacuum conditions, low background thermal radiation and conditions simulating outer space due to the design features, reducing working time, saving liquid nitrogen during research and testing of optical-electronic and optical-mechanical devices, as well as the radiation cooling systems.

4 cl, 4 dwg