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What is CO2 F-Theta Scan lens
Posted on:
2021-11-24
The CO2 F-Theta Scan lens is also called a flat field focusing lens, referred to as a scanning lens or field lens. Its image height is equal to the focal length times the scanning angle (y=Fθ), which is different from the ordinary lens Y= Ftanθ. It is specially designed so that the incident angle of the beam and the position of the spot on the image plane satisfy a linear relationship, so that the position of the spot on the image plane can be controlled by controlling the scanning angle of the incident beam to form a linear scanning rate, and finally the laser beam can be A focused spot of uniform size is formed in the entire marking plane. Applications: laser marking, engraving, rapid prototyping, drilling, welding, cutting, 3D printing, laser cleaning and other systems.
The CO2 F-Theta Scan lens is commonly used in high performance laser scanning systems to generate foci whose lateral displacement depends linearly on the scan angle. This is a characteristic that is typically required, such as in laser material processing applications. In VirtualLab Fusion, we provide scanning light sources for such cases, combined with different field solvers, to easily evaluate the performance of such scanning lens systems.
Using the scanning source in VirtualLab Fusion, we can analyze the performance of the CO2 F-Theta Scan lens by measuring the deviation of the focal position and spot size at different scanning angles.
The scanning source in the CO2 F-Theta Scan lens defines a multi-mode source that radiates into several predefined directions, which is useful for modeling and evaluating laser scanning systems.
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