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Updated: Feb 2, 2026

Laser Micromachining for Polymer Surface Topography Design
Published on: September 19, 2025
Design and Performance of a Focus-Detection System for Use in Laser Micromachining
Binh Xuan Cao1,2, Munju Bae3, Hyonkee Sohn4
1Department of Laser and Electron Beam Application, Korea Institute of Machinery & Materials (KIMM), Daejeon 34103, Korea. xuanbinh.cao@gmail.com.
Abstract:
We describe a new approach for locating the focal position in laser micromachining. This approach is based on a feedback system that uses a charge-coupled device (CCD) camera, a beam splitter, and a mirror to focus a laser beam on the surface of a work piece. We tested the proposed method for locating the focal position by using Zemax simulations, as well as physically carrying out drilling processes. Compared with conventional methods, this approach is advantageous because: the implementation is simple, the specimen can easily be positioned at the focal position, and the dynamically adjustable scan amplitude and the CCD camera can be used to monitor the laser beam's profile. The proposed technique will be particularly useful for locating the focal position on any surface in laser micromachining.
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