Beam forming device and measuring device
The beamforming device employing an optical fiber and axicon generates a Bessel Gaussian beam, addressing the trade-off between spatial resolution and propagation distance, and enhancing the capabilities of 3D measurements and laser processing.
JP7657447B2Active Publication Date: 2025-04-07THE UNIV OF TOKYO
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Patent Information
- Application Number
- JP2021049793
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2021-03-24
- Publication Date
- 2025-04-07
- Estimated Expiration
- 2041-03-24
AI Technical Summary
Technical Problem
Conventional beamforming techniques face a trade-off between vertical and horizontal spatial resolution and beam propagation distance, limiting their effectiveness in high-resolution 3D measurements and laser processing applications.
Method used
A beamforming device that uses an optical fiber and an axicon to generate a Bessel Gaussian beam, allowing for a narrow beam diameter while increasing the propagation distance, thus overcoming the trade-off limitations.
Benefits of technology
Enables high-definition 3D measurement over long distances and allows for the drilling of ultra-fine holes with high aspect ratios in laser processing, by maintaining a small beam diameter and extending the propagation distance.
✦ Generated by Eureka AI based on patent content.
Abstract
To lengthen propagation distance while keeping a beam diameter thin.SOLUTION: A beam formation device 100 includes: optical fiber 20 having an exit end unit 21b for propagating laser light and emitting light from a core end surface 22b; and an axicon 30 that is arranged at an exit end, and forms a beam BM for measurement that is a Bessel Gauss beam by receiving divergent light L1 emitted from a core end surface 22b of the optical fiber 20 to emit it from an exit surface 30b that is a conical surface.SELECTED DRAWING: Figure 1
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