In-Situ Real-Time Focus Detection during Laser Processing Using Double-Hole Masks and Advanced Image Sensor Software.

Area of Science:

• Optics and Photonics
• Materials Science
• Laser Technology

Background:

• High-intensity ultrafast laser processing requires precise focal point detection for optimal results.
• Conventional methods for focal detection are complex, expensive, and cannot perform simultaneous fabrication.
• There is a significant demand for in-situ, real-time focus determination systems in laser applications.

Purpose of the Study:

• To propose a novel optical design for simultaneous focal point detection and complex pattern fabrication.
• To develop a system that overcomes the limitations of conventional laser processing techniques.
• To enable rapid, non-destructive, and precise focal point detection for industrial and scientific use.

Main Methods:

• An optical design utilizing a bandpass filter for in-situ, real-time focus detection via laser transmission.
• Simultaneous fabrication of complex patterns on planar sample surfaces.
• Development of a system compatible with high-power laser processing.

Main Results:

• The proposed system achieves simultaneous focal point detection and fabrication.
• The bandpass filter method allows for rapid, non-destructive, and precise focal point identification.
• The technique is demonstrated to be effective for complex pattern generation.

Conclusions:

• The developed optical design offers a simple yet effective solution for real-time laser focus determination and fabrication.
• This technology is suitable for both scientific research and industrial mass production.
• The system is expected to advance the capabilities of next-generation laser equipment for micro-pattern fabrication.