Platinum-coated metal film capillary, gas raman spectroscopy detection system and use method

By depositing mirror-finished platinum films on the inner and outer walls and both end faces of a silica capillary, and combining them with specific optical components to construct a gas Raman spectroscopy detection system, the problems of low signal-to-noise ratio, short exposure time, and insufficient durability in the existing technology are solved, and gas Raman spectroscopy detection with high signal-to-noise ratio, long exposure time, and high durability is achieved.

CN116773504BActive Publication Date: 2026-03-24WUHAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-03-14
Publication Date
2026-03-24

AI Technical Summary

Technical Problem

Existing gas Raman spectroscopy detection systems have high signal-to-noise ratios, short exposure times, and low durability. In particular, when using capillaries with silver or inert metal films, the interaction between the laser and the anti-oxidation layer generates noise, and the coating method makes it difficult to form a uniform mirror surface on the inner wall of a slender structure.

Method used

A gas Raman spectroscopy detection system is constructed by uniformly depositing a mirror-finished platinum metal film on the inner wall, outer wall, and both end faces of a silica capillary. The film is deposited for 400 cycles using atomic layer deposition technology. The system is combined with components such as a laser, fiber collimator, filter, and mirror to improve signal collection efficiency and durability by utilizing the reflection and scattering effects within the platinum metal film capillary.

Benefits of technology

It effectively reduces system noise, improves the signal-to-noise ratio, extends exposure time, enhances the durability of platinum-coated metal film capillaries, and can reflect Raman signals multiple times in corrosive and oxidizing gases, thereby improving signal collection rate, shortening exposure time, and avoiding environmental light pollution.

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Abstract

A kind of plating platinum metal film capillary, gas raman spectrum detection system and use method, plating platinum metal film capillary includes silica capillary and plating film, the length of silica capillary is 5 to 20 centimeters, inner diameter is 0.5 to 2 millimeters, the inner wall, outer wall and both side end face of silica capillary are evenly plated with plating film, plating film is mirror surface platinum film, in the gas raman spectrum detection system based on plating platinum metal film capillary, laser is processed after passing through precision grinding lens, optical fiber collimating coupler, narrow band filter, long focus best shape lens, dichroic filter, pinhole plate, and enters plating platinum metal film capillary, and Raman signal is generated by two interactions with gas in plating platinum metal film capillary by the reflection of second reflector.This design not only can carry out raman spectrum detection to the gas of strong corrosivity or / and strong oxidizability, but also can reflect Raman signal multiple times, effectively improves the collection rate and durability of system's Raman signal.
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Citation Information

Patent Citations

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