Title:
【発明の名称】観察光学機器の防振光学系
Document Type and Number:
Japanese Patent JP3335302
Kind Code:
B2
Abstract:
An optical system for a binocular is provided with an objective optical system, an erecting system and an eyepiece. The objective optical system includes a first lens having positive refractive power, a second lens having negative refractive power and a third aspherical lens having positive refractive power. The third lens is capable of moving in a direction orthogonal to an optical axis of the objective optical system. The objective optical system satisfies the following conditions: (1) D12/f0<0.16, where, D12 is a distance from the object side of the first lens and the image side of the second lens of the objective optical system, and f0 is the focal length of the objective optical system.
Inventors:
Takaaki Yano
Application Number:
JP117398A
Publication Date:
October 15, 2002
Filing Date:
January 06, 1998
Export Citation:
Assignee:
Asahi Optical Co., Ltd.
International Classes:
G02B23/00; G02B13/00; G02B13/18; G02B23/18; G02B25/00; G02B27/64; (IPC1-7): G02B27/64; G02B13/00; G02B13/18; G02B23/00; G02B25/00
Domestic Patent References:
| JP8201691A |
Attorney, Agent or Firm:
Kunio Miura