Handheld LIBS Device Auto-Focusing and Micro-Area Imaging
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Solution Overview
Problem
Existing LIBS instruments cannot accurately determine whether the laser target point falls on a sample or impurity particles, leading to inaccurate analysis results due to the heterogeneity of natural minerals.
Innovation Solution
A handheld LIBS analysis device with auto-focusing and micro-area imaging functions, featuring a pulse laser, optical path module, and camera, which allows for precise determination of the laser target point's position on the sample by emitting laser light to induce plasma and capturing atomic spectra, enabling accurate sample detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If LIBS detection is performed on natural minerals, then material identification and composition analysis are achieved, but the heterogeneity of natural minerals causes the laser target point to fall on impurity particles, leading to inaccurate analysis results
Solution Approach 1:
The patent introduces an optical path module with beam splitter, total reflector, and camera as an intermediary system. This mediator captures and transmits optical signals from the laser interaction region to the camera, enabling real-time visualization of the laser target point position on the sample surface, thus allowing operators to verify whether the laser is hitting the intended sample area or impurity particles
Solution Approach 2:
The patent implements a feedback mechanism where the camera captures real-time images of the laser target point position and displays them to the operator. This visual feedback loop allows the operator to monitor the laser spot location continuously and adjust the targeting to ensure it falls on the intended sample rather than impurity particles, thereby improving measurement accuracy and result reliability
2Ease of operation
If a handheld LIBS device is designed for field use, then portability and ease of operation are improved, but the ability to accurately determine laser target point position on heterogeneous samples deteriorates
Solution Approach 1:
The patent merges the LIBS detection function with imaging observation function into a single handheld device. The optical path module integrates the beam splitter, total reflector, and camera system with the laser and spectrometer, allowing simultaneous or sequential use of both functions without requiring separate equipment, thus maintaining portability while adding target verification capability
Solution Approach 2:
The camera system serves as an intermediary that bridges the gap between the operator and the microscopic laser interaction region. By capturing and displaying images of the laser target point position, the camera mediator enables precise targeting on heterogeneous samples even in field conditions, improving measurement precision without compromising the handheld portability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device enables operators to detect samples more accurately and conveniently by distinguishing between the sample and impurity particles, improving the reliability of LIBS analysis.
Implementation Method 1
pulse laser light is focused on a sample to induce the sample to produce atomic emission spectrum of plasma
Implementation Method 2
the atomic spectrum emitted by the plasma is reflected to the beam splitter through the perforated total reflector in turn, and a transmission to reflection ratio of the beam splitter is 1:9
Data Source
AI summary
Disclosed are a LIBS (Laser-Induced Breakdown Spectroscopy) analysis device with auto-focusing and micro-area imaging functions and application of the LIBS analysis device. A device body of the LIBS analysis device includes a mounting seat. A pulse laser, an optical path module and an auto-focusing module are arranged on the mounting seat. The optical path module includes a first mounting box, a second mounting box and a third mounting box. The first mounting box, the second mounting box and the third mounting box are internally provided with a perforated total reflector, a beam splitter and a total reflector, respectively. The auto-focusing module and the pulse laser are respectively arranged on both sides of the first mounting box. An optical fiber coupler is connected to a side face of the second mounting box. A camera is connected to a side face of the third mounting box.