Beam monitoring device

The beam monitoring device uses a beam splitter and wedge substrate to accurately measure high-power laser light shape and intensity, reducing sensor costs and enabling quick abnormality detection, addressing the challenges of existing systems.

JP2026110046APending Publication Date: 2026-07-02MITSUBISHI HEAVY IND LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
MITSUBISHI HEAVY IND LTD
Filing Date
2024-12-20
Publication Date
2026-07-02

AI Technical Summary

Technical Problem

Existing systems for monitoring high-power laser light struggle with accuracy and difficulty in measuring shape and light intensity, particularly when using sensors on the output side, and are unable to effectively handle high-power laser light.

Method used

A beam monitoring device employing a beam splitter that transmits and reflects laser light to separate components for shape and intensity measurement, utilizing a wedge substrate to ensure accurate measurement without the need for high-intensity sensors, and includes a control unit for abnormality detection.

Benefits of technology

Enables easy monitoring of high-power laser light shape and intensity with reduced sensor costs and miniaturization, allowing for timely detection of abnormalities and protection of the laser system.

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Abstract

We provide a monitoring system that allows for easy monitoring of laser light. [Solution] The system includes a beam splitter 420 that transmits some of the laser light L emitted from the transmission fiber F2 with an oscillator as the light source toward the laser head 300 and reflects some of the laser light L; a camera 460 that measures the shape of the laser light L reflected by the beam splitter 420; and a photosensor 480 that measures the light intensity of the laser light L reflected by the beam splitter 420.
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