A method of designing a plastic zoom lens with a diffractive-refractive hybrid corrector, comprising one diffractive lens and one refractive lens, is described. The efficiency of this method is demonstrated by designing a compact zoom lens for a mobile phone. This zoom design, incorporating lenses made only of two commercial optical plastics (polymethylmethacrylate and polycarbonate), provides high optical performance.
[Show abstract][Hide abstract] ABSTRACT: In an earlier publication [Appl. Opt. 47, 3722 (2008)] we suggested an adaptive optical lens, which consists of two cascaded diffractive optical elements (DOEs). Due to the Moiré-effect the combined optical element acts as a Fresnel zone lens with a refractive power that can be continuously adjusted by a mutual rotation of the two stacked DOEs. Here we present an experimental realization of this concept. Four designs of these Moiré-DOEs (MDOEs) were fabricated in thin (0.7 mm) glass slides by lithography and subsequent etching. Each element was realized as a 16 phase level DOE designed for 633 nm illumination. Our experimental investigation shows that the Moiré-lenses have a broad adjustable refractive power range with a high efficiency, which allows one to use them for flexible beam steering and for imaging applications.
[Show abstract][Hide abstract] ABSTRACT: The requirements for selecting the initial scheme for a compact plastic zoom lens are formulated. The main stages of the initial scheme of the transformation, incorporating the diffractive lens and replacement of the lenses' glasses by optical plastics, are presented. The efficiency of the suggested techniques of the optical layout process are demonstrated by using the example of the design and analysis of a zoom lens intended for use in security cameras for day or night vision.
[Show abstract][Hide abstract] ABSTRACT: This paper proposes a new zoom lens design with intermediate image. The
two 3x zoom lenses are independently designed and then cascaded to a 9x
zoom lens. The concept of intermediate optics is applied in this paper
in order to minimize size of front diameter and overall length. The
final layout shows the proposed 9x zoom lens can effectively miniature
the front diameter of lens about 44.25%.
Proceedings of SPIE - The International Society for Optical Engineering 09/2013; DOI:10.1117/12.2023599 · 0.20 Impact Factor
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