Abstract
Optical design of f-theta lenses, which fit for laser marking as the focusing lenses, is introduced. What are required for such kind of lenses is that their image height is proportional to the incident angle of laser beams through introducing reasonable barrel distortion so as to mark linearly. As one of examples, an f-theta lens with its working area as large as 500×500mm2 is obtained after optimal design. The lens has advantages of simplicity, compactness, and diffraction-limited performance.
© 2006 Optical Society of America
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