Abstract
In this paper, we theoretically and experimentally evaluated the quality of volume phase transmission lenses stored in an environmentally friendly photopolymer. Holographic lenses (HLs) were obtained using symmetrical and asymmetrical experimental setups with the same positive and negative focal length and pupil diameter. The image quality was evaluated from the calculation of the modulation transfer function (MTF) by capturing the point spread function (PSF) with a charge-coupled device (CCD). A maximum frequency of 14 L/mm, reaching an MTF value of 0.1, was obtained for a negative asymmetrically recorded HL, evaluated at 473 nm wavelength. A theoretical study of aberrations was carried out to qualitatively evaluate the experimental results obtained.
Highlights
Holography is based on Gabor’s principle of wavefront reconstruction [1]
A similar positive asymmetric holographic lenses (HLs) showed a frequency of 7 L/mm
Asymmetrical and symmetrical HLs were analyzed in terms of image quality
Summary
Holography is based on Gabor’s principle of wavefront reconstruction [1]. It is a technique to register and reconstruct three-dimensional objects. Holographic optical elements (HOEs) are among the most interesting applications of holography because they replace curved and heavy refractive optical elements with a simple, flat, and lightweight element. HOEs store the interference pattern produced by two spatially overlapping coherent beams. This pattern creates a photonic structure capable of diffracting light in a desired way. The first HOE concept of holographic application, a holographic mirror, was described by Denisyuk in 1962 [2]. A point-source hologram which acts as a lens was demonstrated by Schwar et al
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