Wide-angle eyepiece lens with large eye relief

专利名称：Wide-angle eyepiece lens with large eye

relief

发明人：Yasuhiro Omura申请号：US09/020877申请日：19980209公开号：US06104542A公开日：20000815

摘要：Wide-angle eyepiece lenses for a microscope are disclosed. A representativelens comprises, from the object side to the eye side, a first lens group with positiverefractive power, a second lens group with a concave surface facing the object side and asurface (closest to the object side) contacting air, and a third lens group with positiverefractive power and at least one surface contacting air. One or both of the surface of thesecond lens group closest to the object side and the air-contacting surface of the thirdlens group is aspherical.

申请人：NIKON CORPORATION

代理机构：Klarquist Sparkman Campbell Leigh & Whinston, LLP

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