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1. US20100172029 - Image forming lens and microscope apparatus using the same

官庁 アメリカ合衆国
出願番号 12729858
出願日 23.03.2010
公開番号 20100172029
公開日 08.07.2010
特許番号 07864438
特許付与日 04.01.2011
公報種別 B2
IPC
G02B 21/02
G物理学
02光学
B光学要素,光学系,または光学装置
21顕微鏡
02対物レンズ
G02B 25/00
G物理学
02光学
B光学要素,光学系,または光学装置
25接眼レンズ;拡大鏡
出願人 Nikon Corporation
発明者 Nakayama Hiroaki
代理人 Miles & Stockbridge P.C.
優先権情報 2007273276 22.10.2007 JP
発明の名称
(EN) Image forming lens and microscope apparatus using the same
要約
(EN)

An image forming lens has a configuration that an image forming lens IL for receiving parallel beams of light emitted from an observation target object and emerging from an infinity-designed objective lens of a microscope and forming an image of the observation target object in a predetermined position, is constructed of, in order from an object side, a first lens group G1 having positive refractive power and a second lens group G2 having negative refractive power, and the first lens group is constructed of a positive lens (e.g., a biconvex lens L1) and a negative lens (e.g., a negative meniscus lens L2). Glass materials of the positive lens and the negative lens configuring the first lens group G1 satisfy conditions of predetermined νdht and partial dispersion ratio Pht, then a transmittance, with respect to the light having a wavelength of 340 nm, of each of the glass materials of all the lenses is equal to or larger than 50% per glass thickness of 10 mm, and the transmittance with respect to the light having the wavelength of 360 nm is equal to or larger than 80% per glass thickness of 10 mm.

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