Thermoelectric refrigeration focal plane device for space astronomical camera

A technology of thermoelectric refrigeration and thermoelectric refrigerator, which is applied in the camera body, camera, optics and other directions, can solve the problems of easy evaporation and leakage of liquid nitrogen, complex temperature control structure and large volume of liquid nitrogen, etc.

Inactive Publication Date: 2020-10-20
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0003] The present invention aims to solve the problems in the prior art that the temperature control structure of liquid nitrogen is complex, large in size and high in mass, and liquid nitrogen is easy to evaporate and leak, which leads to its short service life and cannot meet the application requirements of long-term astronomic...

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  • Thermoelectric refrigeration focal plane device for space astronomical camera
  • Thermoelectric refrigeration focal plane device for space astronomical camera
  • Thermoelectric refrigeration focal plane device for space astronomical camera

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Embodiment Construction

[0037] In order to make the purpose, advantages and features of the present invention clearer, a thermoelectric cooling focal plane device for space astronomical cameras proposed by the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will be more clear from the following specific embodiments. It should be noted that: the drawings are all in a very simplified form and use inaccurate proportions, which are only used to facilitate and clearly illustrate the purpose of the embodiments of the present invention; secondly, the structures shown in the drawings are often actual structures part.

[0038] The present invention is a thermoelectric cooling focal plane device for a space astronomical camera, such as figure 1 As shown, it includes a vacuum-sealed focal plane box 12 , a flexible heat pipe 16 , a satellite radiation cooling plate 17 , a temper...

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Abstract

The invention discloses a thermoelectric refrigeration focal plane device for a space astronomical camera, and aims at solving the technical problems that a liquid nitrogen temperature control structure is complex, the size is large, the mass is large, and the CCD deep refrigeration temperature cannot be met. The device comprises a vacuum sealed focal plane box body, a flexible heat pipe, a satellite radiant cooling plate, a temperature controller and a detector assembly located in the focal plane box body. The top of the focal plane box body is provided with a glass window corresponding to the position of the detector assembly. The detector assembly comprises a detector assembly bottom plate, a lower-level thermoelectric refrigerator, an upper-level thermoelectric refrigerator and a CCD bearing piece which are sequentially bonded from bottom to top. A main thermistor and a bare chip detection CCD comprising a CCD photosensitive area and a CCD storage area are arranged above the CCD bearing sheet. One end of the flexible heat pipe is arranged at the bottom of the outer side of the focal plane box body, and the other end is embedded in the satellite radiant cooling plate. The temperature controller is used for receiving the temperature signal of the main thermistor and controlling the input current of the lower-level thermoelectric refrigerator and the upper-level thermoelectricrefrigerator according to the temperature signal.

Description

technical field [0001] The invention relates to a space astronomical camera, in particular to a thermoelectric cooling focal plane device for a space astronomical camera. Background technique [0002] In order to ensure the signal-to-noise ratio and photometric accuracy of the space astronomical camera for faint target detection, it is necessary to reduce the dark current of the CCD as much as possible, and the dark current is closely related to the operating temperature and temperature control accuracy of the CCD, so it is necessary to reduce the operating temperature of the CCD as much as possible , Improve temperature control accuracy. In the prior art, a liquid nitrogen temperature control structure is usually used. The liquid nitrogen temperature control structure is complex, large in size and high in mass, and liquid nitrogen is easy to evaporate and leak, which leads to a short service life and cannot meet the application of long-term astronomical observation. need. ...

Claims

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Application Information

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IPC IPC(8): G03B17/55
CPCG03B17/55
Inventor 凤良杰杨文刚淡丽军辛伟
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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