Constant-temperature control device for CCDs (charge coupled devices) of spaceflight optical remote sensor

Abstract

The invention discloses a constant-temperature control device for CCDs (charge coupled devices) of a spaceflight optical remote sensor. The constant-temperature control device comprises a micro heat pipe, the CCDs, a thin-film electric heater, a switching plate, a conventional heat pipe, a heat dissipation plate and a control circuit, wherein when the CCDs are switched off, the control circuit controls the thin-film electric heater to heat the micro heat pipe; the micro heat pipe simultaneously transmits generated heat to the CCDs and the heat dissipation plate; the heat dissipation plate dissipates redundant heat, so that the temperature of the CCDs can be kept constant; at the moment when the CCDs are switched on, the control circuit controls the thin-film electric heater to be powered off instantly, and redundant heat generated by the CCDs is dissipated by the heat dissipation plate, so that the temperature of the CCDs can be kept constant. According to the constant-temperature control device for the CCDs, power compensation is performed close to the CCDs, so that temperature fluctuation caused by temperature control delay and CCD power change can be avoided; therefore the temperature stability of the CCDs can be improved.

Description

technical field [0001] The invention belongs to the technical field of thermal control of aerospace optical remote sensors, and relates to a constant temperature control device for CCD devices of aerospace optical remote sensors. Background technique [0002] CCD device (Charge Coupled Device), as a key component of aerospace optical remote sensing camera, plays a vital role in whether the camera can transmit high-quality images. CCD devices have very strict requirements on temperature stability. Excessive temperature fluctuations will increase dark current and thermal noise, thereby reducing the ability of photoelectric conversion, resulting in a decrease in signal-to-noise ratio and affecting image quality. In addition, since the CCD device is directly installed on the support structure, the temperature rise of the CCD device will cause the temperature of the support structure in contact with it to rise. When the number of CCD devices is large and the line array is long, t...

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Problems solved by technology

[0003] The technical problem solved by the present invention is: to overcome the deficiencies in the prior art, and to propose a constant temperature control device for the CCD device of an aerospace optical remote sensing device, which solves the problem of the high-resolution space optical remote sensing camera CCD device due to the change of its heating power and the temperature control device. The problem of excessive temperature fluctuation caused by the temperature control delay

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