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How to Choose the Right Galvo Scan Head?

In the dynamic realm of laser technology, selecting the right galvo scan head is a critical decision that directly impacts the efficiency and precision of various applications. Han's Scanner, renowned for its strong R&D capabilities, offers a range of galvanometer systems catering to diverse industries. In this guide, we will explore the intricacies of choosing the ideal galvo scan head based on specific application requirements.

Types of Galvo Scan Heads

Galvo scan heads come in both single-axis and dual-axis configurations, each tailored to specific needs. A single-axis galvo mirror kit typically includes the mirror, servo amplifier, and connecting cables. These mirrors offer coating options for infrared and visible light, providing versatility for different applications. On the other hand, dual-axis galvo mirrors serve as core modules for OEM processing and three-axis systems. The alignment of XY dual-axis mirrors is crucial for building high-performance scanning systems.

Furthermore, dual-axis galvo scan heads are compatible with various lasers, offering optimal spot size, working distance, and field of view by choosing the right lens. The Han's scan heads, when combined with suitable lasers and lenses, find extensive applications in marking, cutting solar cell films, surface treatment, deep engraving, semiconductor material processing, low-power welding, and sintering.

Three-Axis Scan Heads

Three-axis scan heads encompass standard XY dual-axis scan heads with an added Z-axis electric focus. These scan heads are designed for three-dimensional non-flat surface marking, with a field of view reaching up to one square meter. This makes it possible to process entire solar cell panels with a single scan. The flexibility of three-axis scan heads allows for precise control of heat by intentionally defocusing, achieving a spot diameter as low as 22 µm.

Implementing a lens-after-scan configuration, the motion mirror is positioned behind the lens. The laser, entering from the right, passes through a beam expander and the lens before being focused onto the work surface by the scanning mirror. To maintain a flat field of view, the beam expander remains stationary, and adjustments to the Z-axis focus are calculated and controlled by the controller for any XY position.

Choosing the Right Galvo Scan Head

Selecting the appropriate galvo scan head begins with understanding laser processing requirements. The efficiency of processing relies on how effectively the beam energy is transmitted to the workpiece surface. For instance, dual-axis scan heads utilize a lens-before-scan configuration, requiring lenses with a flat field to uniformly focus the spot on the entire work surface.

The most common scanning lens, the fθ lens, is suitable for applications like CO2 lasers with long wavelengths. However, shorter-wavelength applications, such as UV lasers ranging from 255 nm to 1064 nm, may require multi-element lenses to provide a high-quality spot.

While dual-axis scan heads with fθ lenses are ideal for flat objects and approximately 6-inch fields of view, larger surfaces like solar cell panels necessitate the use of three-axis scan heads with larger fields of view.

In conclusion, the process of choosing the right galvo scan head involves a meticulous consideration of application requirements. Han's Scanner, with its comprehensive range of galvanometer systems, continues to lead in providing solutions tailored to diverse industry needs. By understanding the nuances of single-axis, dual-axis, and three-axis scan heads, businesses can make informed decisions, ensuring optimal performance and precision in laser applications.

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