Aspherical Lens Design by Using a Numerical Analysis

Kweon, Gyeong-il; Kim, Cheol-Ho

doi:10.3938/jkps.51.93

Cited by 32 publications

(15 citation statements)

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“…While analytical solutions for minimizing spherical aberration for the central views exist [Kweon and Kim 2007], yielding similar solutions for multiple off-center views is tedious to achieve, especially if coma aberrations are also to be minimized. Instead, we employ numerical optimization to generate the optimal lens shape given a specific lens model.…”

Section: Lens Optimizationmentioning

confidence: 99%

Content-adaptive lenticular prints

et al. 2013

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Lenticular prints are a popular medium for producing automultiscopic glasses-free 3D images. The light field emitted by such prints has a fixed spatial and angular resolution. We increase both perceived angular and spatial resolution by modifying the lenslet array to better match the content of a given light field. Our optimization algorithm analyzes the input light field and computes an optimal lenslet size, shape, and arrangement that best matches the input light field given a set of output parameters. The resulting emitted light field shows higher detail and smoother motion parallax compared to fixed-size lens arrays. We demonstrate our technique using rendered simulations and by 3D printing lens arrays, and we validate our approach in simulation with a user study.

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Section: Lens Optimizationmentioning

confidence: 99%

Content-adaptive lenticular prints

et al. 2013

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“…The radius (R) is used for determining the aspheric terms such as their shallow or depth. The closest spherical surface is the radius which reaches the aspheric sag at the largest useful diameter [24]. Figure 14 illustrates the aspheric lens sag.…”

Section: Finite Element Analysis For Elastic Deformation Machining Prmentioning

confidence: 99%

FEA and Experimentally Determination of Applied Elasticity Problem for Fabricating Aspheric Surfaces

Nguyen¹

2019

Elasticity of Materials - Basic Principles and Design of Structures

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The elastic deformation machining method is suitable for fabricating aspheric surfaces that have excellent physical properties of elastic materials. The machining process is carried out with the deformation model without mold. When vacuum pressure is supplied to the workpiece, the top surfaces of workpiece are deformed into aspheric shape. After machining process, the bottom surface will be formed into the aspheric shape and the top surface returns to its original flat surface form due to internal force and bending moments of the material. However, the accuracy will decrease due to the reduced thickness while the vacuum pressure keeps unchanged during machining process. Therefore, it is necessary to carry out the finite element analysis (FEA) to determine the vacuum pressure with corresponding to the reduced thickness. In addition, the mold with its surface approximates and the desired surface form of the lens is also presented. When uniform vacuum pressure is supplied to the workpiece through small holes of the mold, the workpiece will be deformed into aspheric profile as similar to the mold surfaces. In order to improving the form accuracy, the FEA and the experiment are studied for modifying the mold profile to correspond with bending strength of workpiece material.

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“…Optical simulation platforms, such as Zemax, are routinely employed to design aspherical lenses [13,14] and spherically corrected achromatic variable-focus liquid lenses [15] for superior optical performance. Such tools offer the opportunity to estimate the optical properties of lenses in order to gauge their optical performance prior to construction.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of electrically tunable aspherical optofluidic lenses

Mishra¹,

Mugele²

2016

Opt. Express

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Abstract:In this work, we use the numerical simulation platform Zemax to investigate the optical properties of electrically tunable aspherical liquid lenses, as we recently reported in an experimental study [K. Mishra, C. Murade, B. Carreel, I. Roghair, J. M. Oh, G. Manukyan, D. van den Ende, and F. Mugele, "Optofluidic lens with tunable focal length and asphericity," Sci. Rep. 4, 6378 (2014)]. Based on the measured lens profiles in the presence of an inhomogeneous electric field and the geometry of the optical device, we calculate the optical aberrations, focusing in particular on the Z11 Zernike coefficient of spherical aberration obtained at zero defocus (Z4). Focal length and spherical aberrations are calculated for a wide range of control parameters (fluid pressure and electric field), parallel with the experimental results. Similarly, the modulation transfer function (MTF), image spot diagrams, Strehl's ratio, and peak-to-valley (P-V) and root mean square (RMS) wavefront errors are calculated to quantify the performance of our aspherical liquid lenses. We demonstrate that the device concept allows compensation for a wide range of spherical aberrations encountered in optical systems.

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Aspherical Lens Design by Using a Numerical Analysis

Cited by 32 publications

References 1 publication

Content-adaptive lenticular prints

Content-adaptive lenticular prints

FEA and Experimentally Determination of Applied Elasticity Problem for Fabricating Aspheric Surfaces

Numerical analysis of electrically tunable aspherical optofluidic lenses

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