Title:
RELAY OPTICAL SYSTEM, RIGID SCOPE OPTICAL SYSTEM USING SAME, AND RIGID SCOPE
Document Type and Number:
WIPO Patent Application WO/2017/216970
Kind Code:
A1
Abstract:
Provided are a relay optical system that excellently corrects chromatic aberration; a rigid scope optical system using the same; and a rigid scope. The relay optical system has a first lens and a second lens. The first and second lenses are arranged upon an optical path in the relay optical system, which is formed by an object-side optical path and an image-side optical path. The lens medium and the focal distance signs each differ for the first and second lenses and when, in a Cartesian coordinate system having a horizontal axis νdLA and a vertical axis θgFLA, a straight line indicated by θgFLA = α ×νdLA + βLA (where α = -0.00163) is set, the first lens medium θgFLA and νdLA are included in an area defined by conditional formulas (1) and (2) and conditional formula (3) is fulfilled. 0.64 <βLA (1); νdLA < 50 (2); -1.4 < mg < -0.6 (3)
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Inventors:
AMANAI TAKAHIRO (JP)
Application Number:
PCT/JP2016/068168
Publication Date:
December 21, 2017
Filing Date:
June 17, 2016
Export Citation:
Assignee:
OLYMPUS CORP (JP)
International Classes:
G02B13/00; A61B1/00; G02B23/26
Domestic Patent References:
| WO1989011112A1 | 1989-11-16 | |||
| WO2013021704A1 | 2013-02-14 |
Foreign References:
| JPS6177819A | 1986-04-21 | |||
| JP2015118136A | 2015-06-25 | |||
| US5684629A | 1997-11-04 | |||
| JP2003524204A | 2003-08-12 |
Attorney, Agent or Firm:
SAITO Keisuke et al. (JP)
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