Imaging performance of an ultra-precision machining-based Fresnel lens in ophthalmic devices

Van Truong Vu; Syed Azkar Ui Hasan; Hongseok Youn; Youngdurk Park; Hocheol Lee

doi:10.1364/oe.438531

journal article Sep 21, 2021

Imaging performance of an ultra-precision machining-based Fresnel lens in ophthalmic devices

Van Truong Vu Syed Azkar Ui Hasan Hongseok Youn

Youngdurk Park Hocheol Lee

Optics Express Vol. 29 No. 20 pp. 32068 · Optica Publishing Group

View at Publisher Save 10.1364/oe.438531

Abstract

This study aims to resolve the trade-off between the constraints and capabilities of ultra-precision machining to achieve ophthalmic Fresnel lenses. A general Fresnel lens pattern has a narrow variable pitch and curved grooves. However, we obviate the limitations of the tool nose radius constraint and the long tool path via ultra-precision machining of the modified Fresnel lens, ensuring a constant pitch of 0.1 mm and varying the height of straight grooves from 0 to 11 µm. Photorealistic raytracing visualization and MTF simulation verified the compatibility of the lens pattern with human perception sensitivity. Copper-coated mold was fabricated using a diamond tool with a tool nose radius of 5 µm. The replicated flexible Fresnel lens demonstrated a relative MTF imaging performance of 89.1% and was attached to the goggles for the qualitative assessment. The proposed Fresnel lens design and fabrication approach can be extended to applications in the visual and infrared ranges as well.

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Metrics

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Citations

36

References

Details

Published: Sep 21, 2021
Vol/Issue: 29(20)
Pages: 32068
License: View

Authors

V

Van Truong Vu

Hanbat National University

S

Syed Azkar Ui Hasan

Hanbat National University

H

Hongseok Youn

Hanbat National University

Y

Youngdurk Park

Hanbat National University

H

Hocheol Lee

Hanbat National University

Funding

Hanbat National University Award: 2020

Cite This Article

Van Truong Vu, Syed Azkar Ui Hasan, Hongseok Youn, et al. (2021). Imaging performance of an ultra-precision machining-based Fresnel lens in ophthalmic devices. Optics Express, 29(20), 32068. https://doi.org/10.1364/oe.438531

Imaging performance of an ultra-precision machining-based Fresnel lens in ophthalmic devices

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