Active-cooling vacuum-sealing focal plane assembly of space camera

Abstract

The invention provides an active-cooling vacuum-sealing focal plane assembly of a space camera. Via the assembly, a detector can be cooled below -60 DEG C, and the problem that a traditional focal plane detector of the camera causes steam pollution during cooling is solved. The assembly comprises a focal plane case trimming pad, a clamping ring, a vacuum glass window, a vacuum focal plane case, a vacuum sealing connector, a cooling assembly, a focal plane case pedestal, a focal plane case base plate, heat tubes, a relay box, thermistors and thermoelectric coolers, the vacuum glass window seals and compresses a light inlet via the clamping ring, and the focal plane case trimming pad is arranged in the front end of the clamping ring; the cooling assembly comprises a cold screen window, a cold screen, an active cooling CCD assembly and a cold screen base plate; the cold screen window is installed in a gap of the cold screen; the back side of the cold screen base plate is provided with the thermistors and thermoelectric coolers; and the cooling assembly, the focal plane case pedestal, the focal plane case base plate and the heat tubes are all arranged in a cavity formed by the vacuum focal plane case and the relay box, and the heat tubes are arranged in the back side of the focal plane case base plate.

Description

technical field [0001] The invention relates to the field of camera sealing devices, in particular to an active refrigeration vacuum sealing focal plane assembly for a space camera. Background technique [0002] The integration time of space astronomical cameras for observing faint targets is long, and the requirements for detector noise suppression are very high. Generally, cooling detectors are used to reduce the detector dark current and improve the signal-to-noise ratio of the camera. Thermo-Electric Cooling (TEC) technology is a cooling method that uses the Peltier effect. It does not require any working medium, has no moving parts, and has a simple structure. It is very suitable for cooling applications on the focal plane of aerospace cameras. However, aerospace refrigeration When the focal surface is tested on the ground, the temperature of the cooling focal surface is generally lower than the ambient dew point, and water vapor condenses on the surface of the low-temp...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problem of water vapor condensation on the existing low-temperature focal plane, the present invention provides an active refrigeration and vacuum-sealed space camera active refrigeration vacuum-sealed focal plane assembly, which can cool the detector to below -60°C, effectively solving the problem of traditional cameras Water Vapor Pollution During Cooling of Focal Plane Detectors

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