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A laser cleaning method and device based on coaxial distance measurement and real-time adjustable focal length

A laser cleaning and laser technology, applied in cleaning methods and utensils, chemical instruments and methods, etc., can solve the problems of poor cleaning effect, complex surface structure of workpiece, inability to overcome manual hand-held shaking, etc., to save space and weight, improve Anti-interference ability, real-time adjustable focal length effect

Active Publication Date: 2021-07-27
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0008] In order to solve the problems of insurmountable manual hand-held shaking and the poor cleaning effect caused by the complex surface structure of the workpiece in the existing laser cleaning method, the present invention proposes a laser cleaning method based on coaxial distance measurement and real-time adjustable focal length and device

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  • A laser cleaning method and device based on coaxial distance measurement and real-time adjustable focal length
  • A laser cleaning method and device based on coaxial distance measurement and real-time adjustable focal length
  • A laser cleaning method and device based on coaxial distance measurement and real-time adjustable focal length

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Embodiment Construction

[0051] In order to illustrate the technical solution of the present invention more clearly, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0052] The present invention is mainly based on the coaxial range measurement and dynamic lens group, and uses the single dichroic light splitting flat plate 2 to realize the coaxial combination of the incident cleaning laser and the distance measurement laser and the separation of the reflected laser light, and obtain the distance information of the workpiece 12, Then through electronically controlled signal processing, the position of the convex lens 7 in the dynamic lens group is adjusted, and then the overall focal length of the lens group is changed, thereby realizing the automatic adjustment of the focal length of the system during the laser cleaning process and ensuring the power density acting on the workpiece 12 .

[0053] The technology mainly invol...

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Abstract

The present invention relates to a laser cleaning device and method, in particular to a laser cleaning method and device based on coaxial distance measurement and real-time adjustable focal length, which solves the insurmountable manual hand-held shaking and complex surface structure of workpieces in existing laser cleaning methods The resulting cleaning effect is not good. In the method of the present invention, the cleaning laser and the ranging laser are coaxially transmitted and focused on the surface of the workpiece. After the laser diffusely reflected back by the workpiece is separated by the dichroic light-splitting flat sheet, the ranging laser is received by the photoelectric detection device, and the real-time measurement of the workpiece is obtained. The amount of distance change is converted into an electrical signal to control the distance change between optical elements and precisely regulate the focal length of the dynamic lens group. At the same time, the present invention also proposes a laser cleaning device based on the method, including a laser coaxial transmission and separation system, a dynamic lens group and a digital control circuit, and realizes automatic adjustment of the focal length by changing the distance between the convex lens of the dynamic lens group and the field lens in real time .

Description

technical field [0001] The invention relates to a laser cleaning method and device, in particular to a laser cleaning method and device based on coaxial distance measurement and real-time adjustable focal length. Background technique [0002] In the process of industrial production, chemical, physical or biological interactions on the surface of materials are likely to form a pollution layer or covering layer, which affects production efficiency and quality, and even causes production safety accidents. Therefore, choosing the appropriate cleaning technology is of great significance to ensure the quality, safety and life of the product. The surface of the material is usually cleaned by mechanical grinding, sandblasting, high-pressure water washing, chemical corrosion, and high-frequency ultrasonic waves. These traditional cleaning technologies have more or less shortcomings. For example, the sandblasting cleaning method will cause serious dust pollution and easily damage the...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B08B7/00
CPCB08B7/0042
Inventor 俱沛范文慧高卫
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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