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Method to design two aspheric surfaces for a wide field of view imaging system with low distortion

机译:用于低失真的宽视场成像系统的两个非球面设计方法

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This paper presents a distortion correction method for designing a wide field of view (FOV) lens for an imaging system. The lens is composed of two aspheric surfaces and several spheres. In the preliminary design, profiles of the aspheric surfaces can be obtained according to aplanatism, refraction law, and polynomial fitting methods, where the numeric computation, the differential geometry computation, and the polynomial fitting algorithm are stated in detail. Then the lens is optimized by the damped least squares method. Theoretically, this method cannot eliminate aberrations absolutely but can balance some kinds of aberrations to the image well. Furthermore, a projector lens with a wide FOV, low distortion, and low throw ratio [TR = (projection distance)/(image diagonal size)] is designed successfully by this method. (C) 2015 Optical Society of America
机译:本文提出了一种畸变校正方法,用于设计成像系统的广角(FOV)镜头。透镜由两个非球面和几个球面组成。在初步设计中,可以根据平整度,折射定律和多项式拟合方法获得非球面的轮廓,其中详细说明了数值计算,微分几何计算和多项式拟合算法。然后,通过阻尼最小二乘法对透镜进行优化。从理论上讲,该方法不能绝对消除像差,但可以很好地平衡图像中的某些像差。此外,通过这种方法成功地设计了具有宽FOV,低畸变和低投射比[TR =(投影距离)/(图像对角线尺寸)]的投影仪镜头。 (C)2015年美国眼镜学会

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