#5222. Novel Approach to Improve the Optical Performance by Machining Process Without Surface Finishing

September 2026publication date
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Journal’s subject area:
Engineering
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Abstract:
With the increase in dimensions of optical elements in addition to ever rising demand for aspherical optics, the millimeter-scale periodic waviness that is naturally produced by machining (such as diamond turning) process in precision optical engineering has been one of the most crucial issues in the development of high surface quality optical elements. Even an extremely small waviness can affect the laser beam profile significantly through interference caused by Bragg scattering. This paper presents a novel method for improving a laser beam profile by utilizing the characteristics of Bragg scattering without requiring established final surface finishing processes such as optical polishing.
Keywords:
Bragg scattering; Diamond turning machining; Interference; Laser beam profile; Periodic structure; Surface finishing; Waviness

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