Laser galvanometric scanning system for improved average power uniformity and larger scanning area

Area of Science:

• Optical Engineering
• Manufacturing Technology

Background:

• Adaptive manufacturing requires precise laser control.
• Traditional laser scanning systems face limitations in spot quality and working area.

Purpose of the Study:

• To introduce a new laser galvanometric scanning optical system with a dynamic-tilt focusing lens.
• To enhance laser spot performance for adaptive manufacturing applications.

Main Methods:

• Simulations were conducted to analyze laser spot size, profile, position, energy distribution, and scanning working field.
• A dynamic-tilt focusing lens was incorporated into a laser galvanometric scanning system.

Main Results:

• The proposed system achieved an average spot size of 50.5 μm, close to the designed 50 μm.
• Maximum position deviation was reduced from 3.02% to 0.055% (x-axis) and 1.30% to 0.162% (y-axis).
• The working field area increased by approximately 240% compared to traditional systems.

Conclusions:

• The novel system demonstrates a small spot size, symmetrical profile, uniform energy distribution, and a large working area.
• This laser galvanometric scanning system is well-suited for rapid prototyping applications.