Photothermal-fluorescent double-mode spectrum detection device and detection method thereof

Abstract

The invention provides a photothermal-fluorescent double-mode spectrum detection device. The photothermal-fluorescent double-mode spectrum detection device comprises a sample table for arranging a to-be-detected sample, and further comprises a pumping light source, a detecting light source, a first photoelectric detector, a second photoelectric detector and a photoelectric multiplier which are connected to the to-be-detected sample light path respectively, wherein the first photoelectric detector is used for receiving a detection photothermal signal transmitted from a detected sample; the second photoelectric detector is used for receiving a detection photothermal signal reflected from the detected sample; the photoelectric multiplier is used for receiving a fluorescent signal transmitted from the detected sample by virtue of an emission monochromator; the output ends of the first photoelectric detector and the second photoelectric detector are connected to the input end of a computer by virtue of a lock-in amplifier; and the output end of the photoelectric multiplier is connected to the input end of the computer. The invention further provides a detecting method of the photothermal-fluorescent double-mode spectrum detection device. The photothermal-fluorescent double-mode spectrum detection device is high in detection sensitivity and relatively reliable in detected result, and capable of eliminating the influences of scattering on the detected results.

Description

technical field [0001] The invention relates to the technical field of spectrum detection, in particular to a photothermal-fluorescence dual-mode spectrum detection device and a detection method thereof. Background technique [0002] Photothermal detection technology is a new method developed in recent years to measure the weak absorption of optical materials. It has the advantages of high sensitivity, convenient adjustment, and non-contact. At present, photothermal detection technology is widely used in the absorption detection of optical materials such as thin film samples or crystal materials. It is a detection method for quantitative analysis and sorting of the properties of optical materials such as thin film samples or crystal materials. At present, the thermal lens method is commonly used in photothermal detection technology, which focuses the pump laser (excitation light) on the surface of the optical material to obtain a certain power density, so that the optical...

AI Technical Summary

Problems solved by technology

[0004] The previous technology is only a single photothermal detection technology, photothermal spectrum detection technology, fluorescence detection technology and fluorescence spectrum detection technology, the detection sensitivity is low, and the measurement results are greatly affected by scattering.

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