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Lin yao Yu,Qun Wei,Jinggao Zheng,Mingda Ge,Tian yi Zhang 한국광학회 2016 Current Optics and Photonics Vol.20 No.1
A new compact conformal dome optical system was established, and the aberration characteristics ofthe dome were investigated using Zernike aberration theory. The aberrations induced by the dome atdifferent fields of regard (FORs) from 30° to 100° were effectively balanced by a rotating cylindrical lens. This kind of optical system can be widely used in top-view optical searching devices. A design methodwas introduced and the optimization results analyzed in detail. The results showed that the Zernikeaberrations produced by the conformal dome were decreased dramatically. Also, a complete conformaloptical system was designed, to further illustrate the aberration correction effect of the rotating cylindricallens. Using a cylindrical lens not only provided a large FOR, but also simplified enormously the structureof the conformal optical system.
Parameterized Modeling of Spatially Varying PSF for Lens Aberration and Defocus
Wang Chao,Chen Juan,Jia Hongguang,Shi Baosong,Zhu Ruifei,Wei Qun,Yu Linyao,Ge Mingda 한국광학회 2015 Current Optics and Photonics Vol.19 No.2
Image deblurring by a deconvolution method requires accurate knowledge of the blur kernel. Existingpoint spread function (PSF) models in the literature corresponding to lens aberrations and defocus are eitherparameterized and spatially invariant or spatially varying but discretely defined. In this paper, aparameterized model is developed and presented for a PSF which is spatially varying due to lens aberrationsand defocus in an imaging system. The model is established from the Seidel third-order aberrationcoefficient and the Hu moment. A skew normal Gauss model is selected for parameterized PSF geometrystructure. The accuracy of the model is demonstrated with simulations and measurements for a defocusedinfrared camera and a single spherical lens digital camera. Compared with optical software Code V, thevisual results of two optical systems validate our analysis and proposed method in size, shape and direction. Quantitative evaluation results reveal the excellent accuracy of the blur kernel model