Optical system and optical apparatus including the same

Invention Grant

US08194319B2 Optical system and optical apparatus including the same 有权

Title translation: 光学系统和包括其的光学装置

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Patent Title: Optical system and optical apparatus including the same
Patent Title (中): 光学系统和包括其的光学装置
Application No.: US13027656

Application Date: 2011-02-15
Publication No.: US08194319B2

Publication Date: 2012-06-05
Inventor: Hironobu Koga
Applicant: Hironobu Koga
Applicant Address: JP Tokyo
Assignee: Canon Kabushiki Kaisha
Current Assignee: Canon Kabushiki Kaisha
Current Assignee Address: JP Tokyo
Agency: Canon U.S.A., Inc. IP Division
Main IPC: G02B5/18
IPC: G02B5/18

Optical system and optical apparatus including the same

Abstract:

An optical system and an optical apparatus capable of properly correcting chromatic aberration over a visible wavelength range are obtained. An optical system includes a diffractive optical element and a refractive optical element on at least one of an object side and an image side of a stop. The following conditions are satisfied: |Δθgd|>0.038 0.003

Abstract(Chinese):

可以获得能够适当地校正可见光波长范围的色像差的光学系统和光学装置。光学系统包括衍射光学元件和在光阑的物体侧和像侧中的至少一个上的折射光学元件。满足以下条件：|＆Dgr;＆thetas; gd |> 0.038 0.003 <|δ＆thetas; dC | <0.038（ΦR×＆ngr; d×δ＆thetas; dC）×（-ΦD）<0其中，ngr d表示阿贝数的折射光学元件，gd表示g线和d线的部分色散比，dC表示d线和C线的部分色散比，ΦR表示提供的光焦度当光入射和折射光学元件的出射表面都与空气接触时，ΦD表示衍射光学元件的光焦度。这里，＆Dgr;＆thetas; gd =＆thetas; gd - （ - 1.687×10-7·＆ngr; d3 + 5.702×10-5·＆ngr; d2-6.603×10-3·＆ngr; d + 1.462）和δ＆ dC =＆thetas; dC - （ - 0.1968＆thetas; gd + 0.5480）。

Public/Granted literature

US20110134530A1 OPTICAL SYSTEM AND OPTICAL APPARATUS INCLUDING THE SAME Public/Granted day:2011-06-09

Information query

Espacenet

IPC分类:

G	物理
G02	光学
G02B	光学元件、系统或仪器
G02B5/00	除透镜外的光学元件（光波导入G02B6/00；光学逻辑元件入G02F3/00）
G02B5/18	.衍射光栅