A quartz-free raman signal gas cell device for raman spectroscopy

By designing a gas cell device without quartz Raman signal, the problem of the detection accuracy of traditional gas cells being affected by quartz Raman signal is solved, realizing high-precision and high-sealing gas detection, which is suitable for Raman spectroscopy detection.

CN117990676BActive Publication Date: 2026-09-08WUHAN UNIV OF TECH
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Patent Information

Application Number
CN202311853474.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-12-29
Publication Date
2026-09-08
Estimated Expiration
2043-12-29

AI Technical Summary

Technical Problem

Traditional gas cells are affected by the quartz Raman signal in Raman spectroscopy detection, which leads to a decrease in detection accuracy.

Method used

Design a gas cell device to eliminate quartz Raman signals, including a first gas cell, a capillary tube and a second gas cell, a laser incident channel, a dichroic mirror and a laser reflection channel. By placing the first window in front of the laser incident channel and setting the distance between the second window and the capillary tube to be greater than 10 cm and the tilt angle to be greater than 5 degrees, the influence of quartz Raman signals can be avoided.

Benefits of technology

It improves the accuracy of gas detection, ensures sealing and connectivity, is suitable for gas analysis in confined spaces, and enhances the accuracy and sensitivity of detection.

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Abstract

A quartz-free Raman signal gas chamber device for Raman spectrum detection, comprising a first gas chamber, a capillary and a second gas chamber; the first gas chamber comprises a first window sheet and a dichroic mirror; the second gas chamber comprises a second channel and a second window sheet; the second window sheet is far away from the capillary and is in an inclined state; in use, after the laser passes through the first window sheet, it is reflected by the dichroic mirror into the capillary to react with the gas to be detected to generate a Raman signal, then the laser passes through the second channel and the second window sheet, and the Raman signal is reflected by the second window sheet to pass out of the dichroic mirror; the quartz Raman signal generated by the first window sheet passes out of the dichroic mirror, and the quartz Raman signal generated by the second window sheet cannot be captured by the capillary; the second window sheet is in an inclined state, so the capillary cannot generate a quartz Raman signal; the design eliminates the quartz Raman signal from three aspects, making the spectrum result accurate. Therefore, the design will not be affected by the quartz Raman signal when detecting the gas, and the detection accuracy is high.
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