Fabrication of hybrid optical line generator by direct machining
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CitationSaastamoinen, Toni. Vayrynen, Juha. Mutanen, Jarkko. Tuovinen, Hemmo. Eronen, Anni. Monkkonen, Kari. Kuittinen, Markku. (2018). Fabrication of hybrid optical line generator by direct machining. OPTICS EXPRESS: THE INTERNATIONAL ELECTRONIC JOURNAL OF OPTICS, 26 (3) , 2335-2340. 10.1364/OE.26.002335.
In this study, a mold of a line generator consisting of a cylindrical lens array with a triangular diffractive grating was ultra-precision diamond machined with Moore 350FG 5-axis ultra-precision machine. The design and the simulation of the hybrid structure were performed using ray tracing and exact electromagnetic theory. The machined hybrid lens structure was replicated to a UV-curable polymer and was then characterized and tested. The optical measurements show that the hybrid element works as designed.