Scanning field mirror, also often called F-Theta field mirror or f-θ field mirror, is a specially designed lens or lens group designed to form a uniform-sized focused spot of the laser beam in the entire scanning plane. This design allows the laser beam to maintain the focus on the same focal plane during the scanning process, regardless of how the beam is tilted, thereby achieving high-precision processing.

What is a scanning field mirror? What are its functions and applications?

Scanning field mirrors are mainly used in laser processing fields, such as laser marking, laser cutting, etc., and have the functions of uniform focused spot formation, stable focus, improved processing accuracy and correction of aberrations.

Functional characteristics

1. Forming uniform focused spot: The scanning field mirror can ensure that the laser beam forms a uniform-sized focused spot in the scanning plane, which is crucial to the quality of laser processing.

2. Maintaining stable focus: Through special optical design, the scanning field mirror can ensure that the focus position of the laser beam is stable during the scanning process, and is not affected by the tilt angle of the beam.

3. Improving processing accuracy: Due to the stable focus and uniform spot, the scanning field mirror can significantly improve the accuracy and consistency of laser processing.

4. Correction of aberrations: The scanning field mirror can also correct the aberrations in the system, including field curvature and distortion, to further improve the imaging quality and processing accuracy.

Application areas

Laser marking: In laser marking machines, the scanning field mirror is one of the key components. It can accurately focus the laser beam on the surface of the workpiece to form a clear and precise mark.

Laser cutting: During the laser cutting process, the scanning field mirror ensures that the laser beam can cut the material evenly, improving the cutting quality and efficiency.

Laser welding: Although laser welding mainly depends on the power and stability of the laser beam, the scanning field mirror can also improve the accuracy and consistency of welding to a certain extent.

Other laser processing fields: such as laser engraving, laser drilling, etc., the scanning field mirror also plays an important role.