Fabrication of aspheric diffractive lens with high precision by precision glass molding

Chengsong Shu; Shaohui Yin; Zhaozhao Mao

doi:10.1117/12.2692727

29 December 2023 Fabrication of aspheric diffractive lens with high precision by precision glass molding

Chengsong Shu, Shaohui Yin, Zhaozhao Mao

Proceedings Volume 12976, Eighth Asia Pacific Conference on Optics Manufacture and Third International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2023); 1297606 (2023) https://doi.org/10.1117/12.2692727
Event: 8th Asia Pacific Conference on Optics Manufacture & 3rd International Forum of Young Scientists on Advanced Optical Manufacturing, 2023, Shenzhen, China

Abstract

Aspheric diffractive lens (ADL) has been widely used in wavefront shaping and infrared field as it can realize optical system aberration elimination and chromatic aberration correction. However, the fabrication of high-precision glass ADL is a challenge. In this paper, A manufacturing method is proposed for high-precision aspheric diffraction mold (ADM), including mold substrate and plating selection, plating layer heat treatment, and single-point diamond turning (SPDT) process. The mold is pre-compensated to improve the molding accuracy based on the simulation-predicted form error of glass ADL. Based on the machined high-precision ADM, an ADL with an aspheric form accuracy of 0.2133 μm, a diffraction zone with a form accuracy PV of 22.5- 95 nm, and a surface roughness Sa of 2.813 nm was fabricated using a multi-step heating and annealing molding process.

Citation Download Citation

Chengsong Shu, Shaohui Yin, and Zhaozhao Mao "Fabrication of aspheric diffractive lens with high precision by precision glass molding", Proc. SPIE 12976, Eighth Asia Pacific Conference on Optics Manufacture and Third International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2023), 1297606 (29 December 2023); https://doi.org/10.1117/12.2692727

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