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https://doi.org/10.3938/NPSM.70.90
Grating Design of a Hybrid Fresnel Lens for Collimating Nonaxial Double Light Source Systems
New Phys.: Sae Mulli 2020; 70: 90~96
Published online January 31, 2020;  https://doi.org/10.3938/NPSM.70.90
© 2020 New Physics: Sae Mulli.

Seong-Won CHOI1*, Young-Mun YOO1, Jong-Tae KIM2

1Department of LED Engineering Cooperation Course, Pukyong University, Busan 48513, Korea
2Department of Converged display engineering, Pukyong University, Busan 48513, Korea
Correspondence to: tjddnjs085@naver.com
Received September 4, 2019; Revised October 4, 2019; Accepted October 14, 2019.
cc This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Fresnel lenses are lenses that have been reduced in size and volume by removing internal volumes that contribute less to the refracting power. Recently, various types of hybrid Fresnel lenses have been proposed for various purposes. In this study, a grating design method for the first surface of a hybrid Fresnel lens optical system was proposed based on the main parameter of a single Fresnel lens optical system for the purpose of miniaturization of the collimating optical system. The grating consists of a mixture of refractive gratings and internal reflection gratings, and the two gratings can compensate for the shortcomings of each other. Double light sources were placed on the nonaxis point of the object focal plane, and the sensitivity of each grating was analyzed for variations in the radiation distribution and the target radiation width according to the distance between the light sources.
PACS numbers: 42.15.-i
Keywords: Fresnel lens, Collimating, Grating, Hybrid lens


January 2020, 70 (1)
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