Distinguishing characteristics of diffractive optical elements and Fresnel lenses

A. Guidry; M. Kyrish; L. Stone; M. Fraelich; O. Lechuga; N. Claytor

doi:10.1117/12.2569208

20 August 2020 Distinguishing characteristics of diffractive optical elements and Fresnel lenses

A. Guidry, M. Kyrish, L. Stone, M. Fraelich, O. Lechuga, N. Claytor

Proceedings Volume 11487, Optical Manufacturing and Testing XIII; 1148715 (2020) https://doi.org/10.1117/12.2569208
Event: SPIE Optical Engineering + Applications, 2020, Online Only

Abstract

Transmissive optical components tend to be classified as either diffractive or refractive, based on which phenomenon more accurately describes the way they function. Although their optical functions are governed by distinct physical phenomena, Fresnel lenses are often confused or conflated with Diffractive Optical Elements (DOEs) like Fresnel zone plates and kinoforms; this is due to their similarities in shape, the method of defining their surfaces, and even the name. This research was conducted as an opportunity to describe the distinguishing characteristics of DOEs and Fresnel lenses, as well as the acceptable terminology to use with both classes of optics. First, background on diffraction and geometrical optics will be discussed, followed by methods used to design and fabricate both types of elements. Then, back focal distance metrology is performed to demonstrate the difference in function. The experiment performed supports the fact that DOEs and Fresnel lenses are not the same. This work is intended as a clarification of nomenclature and functionality, as well as an illumination of what makes DOEs and Fresnel lenses distinct.

Conference Presentation

Citation Download Citation

A. Guidry, M. Kyrish, L. Stone, M. Fraelich, O. Lechuga, and N. Claytor "Distinguishing characteristics of diffractive optical elements and Fresnel lenses", Proc. SPIE 11487, Optical Manufacturing and Testing XIII, 1148715 (20 August 2020); https://doi.org/10.1117/12.2569208

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