Spectral measurement CCD module capable of stably controlling temperature

Abstract

The present invention provides a spectral measurement CCD module capable of stably controlling temperature. The spectral measurement CCD module comprises a heat radiation box with sealing and heat radiation effects, and a semiconductor refrigeration piece, a heat conduction block, a temperature sensor and a CCD are orderly placed from bottom to top at the center in the heat radiation box. The spectral measurement CCD module also comprises an optical calibration unit. The bottom of the heat radiation box is formed as a comb-type sheet structure to increase a surface area so as to facilitate heat radiation. The temperature sensor is embedded into the heat conduction block. The side face of the heat radiation box is provided with a wire outlet hole, and the connection wires of the semiconductor refrigeration piece, the temperature sensor and the CCD are led out from the wire outlet hole. The upper end of the heat radiation box is provided with a transparent window. The optical calibration unit is fixed at the transparent window. The CCD and a refrigeration temperature control unit and an optical correction unit with the functions of correcting aberration and converging energy are integrated, the stable controlling of temperature is realized so as to reduce noise and signal drift, and the sensitivity and resolution of detection spectrum are raised obviously.

Description

technical field [0001] The invention relates to the field of optical detection and analysis, in particular to a spectral measurement CCD module capable of stably controlling temperature. Background technique [0002] CCD, English full name: Charge-coupled Device, Chinese full name: charge-coupled device, can be called a CCD image sensor, also called an image controller. In terms of function, it includes two categories: linear array CCD and area array CCD. [0003] Sensitivity, resolution, signal-to-noise ratio, and baseline stability are important technical performance indicators of spectroscopic instruments. In spectroscopic measurement devices or instruments that use CCDs, especially linear array CCDs, as receivers, due to the limited height of CCD pixels, spectral imaging A large part of the light energy on the surface cannot be received by the photosensitive surface of the CCD, thus restricting the ability of the spectrometer to detect weak light signals, that is, the s...

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Problems solved by technology

[0003] Sensitivity, resolution, signal-to-noise ratio, and baseline stability are important technical performance indicators of spectroscopic instruments. In spectroscopic measurement devices or instruments that use CCDs, especially linear array CCDs, as receivers, due to the limited height of CCD pixels, spectral imaging A large part of the light energy on the surface cannot be received by the photosensitive surface of the CCD, thus restricting the ability of the spectrometer to detect weak light signals, that is, the sensitivity is not high

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