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Short-Wavelength Infrared Imaging Lens and Imaging Device
Short-Wavelength Infrared Imaging Lens and Imaging Device
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机译:短波长红外成像镜头和成像设备
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摘要
A short-wavelength infrared imaging lens includes first and second lens groups arranged in order from an object side. The first lens group has a negative refractive power as a whole. The second lens group has a positive refractive power as a whole and includes at least one positive lens that satisfies following conditional expressions (1) and (2):; V2p40 (1); N2p1.7 (2);Here, N2p is a refractive index N [1.53] of the positive lens at a wavelength of 1.53 μm, and the Abbe number V2p is an Abbe number of the positive lens in a short-wavelength infrared range and is defined as (N [1.53]−1)/(N [0.9]−N [2.325]) when refractive indexes of the at least one positive lens at wavelengths of 0.9 μm, 1.53 μm, and 2.325 μm are represented by N [0.9], N [1.53], and N [2.325], respectively.
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机译:一种短波长红外成像镜头,包括从物侧依次排列的第一和第二透镜组。第一透镜组整体上具有负屈光力。第二透镜组整体上具有正屈光力,并且包括至少一个满足以下条件表达式(1)和(2)的正透镜: <?in-line-formulae description =“在线公式” end =“线索”?> V I> 2 p I 40(1)<?in-line-formulae description =“行内公式” end =“ tail”?>; <?in-line-formulae description =“在线公式” end =“线索”?> N I> 2 p I 1.7(2)<?in-line-formulae description =“ In-line Formulae” end =“ tail”?>;这里,N2p是一个正透镜在1.53μm的波长处的折射率N [1.53],并且阿贝数V2p是在短波长红外范围内正透镜的阿贝数,并且被定义为(N [1.53] -1)/当至少一个正透镜在0.9μm,1.53μm和2.325μm的波长处的折射率由N [0.9],N [1.53]和N [2.325]表示时(N [0.9] -N [2.325]) ], 分别。
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