Multistage and adjustable CCD refrigerating plant of Raman spectrometer

Abstract

The invention relates to a CCD refrigerating plant of a Raman spectrometer, and in particular to a multistage and adjustable CCD refrigerating plant of the Raman spectrometer. The refrigerating plant can be configured to have one single stage or multiple stages according to the demand for refrigerating capacity, and each refrigerating stage is an independent refrigerating unit. Each independent refrigerating unit circuit comprises a temperature sensor, a temperature detection circuit, a temperature setting circuit, a differential amplification circuit, a PID control circuit, a clock control circuit, a PWM pulse modulation circuit, a switch circuit, a TEC refrigerating controller, a CCD device and a heat dissipation device. The multistage and adjustable CCD refrigerating plant of the Raman spectrometer can be arranged singly to achieve the CCD refrigerating function, can also be connected with other controllers to receive temperature set parameters sent by the controllers, feed the real-time temperatures back to the controllers after quick refrigerating is conducted and display the real-time temperatures.

Description

technical field [0001] The invention relates to a Raman spectrometer CCD refrigeration device, in particular to a multi-stage and adjustable Raman spectrometer CCD refrigeration device. Background technique [0002] The Raman spectrometer is a molecular fingerprint identification instrument that uses the principle of Raman scattering to collect the Raman frequency shift spectrum caused by the molecular vibration of the sample. The spectrometer can perform qualitative analysis of substances, and is widely used in food safety, medicine, cultural relics and archaeology, gemstone identification and forensic science. [0003] Due to the relatively small intensity of the Raman scattering spectrum, its instrument design requires higher detection sensitivity and lower detection limit, which puts forward higher requirements for the Raman spectrometer optical machine design, detection circuit design and software design . From the point of view of the detection circuit, the commonly ...

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Problems solved by technology

[0004] In the existing CCD refrigeration device, there are problems such as simple temperature detection circuit, no matching controller, and inability to flexibly configure according to cooling capacity requirements.

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