Title:
EYEPIECE OPTICAL SYSTEM, OPTICAL DEVICE, AND METHOD FOR PRODUCING EYEPIECE OPTICAL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/054359
Kind Code:
A1
Abstract:
Provided are: an eyepiece optical system EL having favorable optical performance and a high observation magnification power; an optical device having this eyepiece optical system EL; and a method for producing an eyepiece optical system EL. This eyepiece optical system EL satisfies the following conditional expression, and has, in order from the observation object side: a first lens component having a positive refractive power; a second lens component having a negative refractive power; a third lens component having a positive refractive power; and a fourth lens component having a positive refractive power. 1.38
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Inventors:
MAKIDA AYUMU (JP)
Application Number:
PCT/JP2018/033570
Publication Date:
March 21, 2019
Filing Date:
September 11, 2018
Export Citation:
Assignee:
NIKON CORP (JP)
International Classes:
G02B25/00
Domestic Patent References:
| WO2013115127A1 | 2013-08-08 |
Foreign References:
| JP2017068129A | 2017-04-06 | |||
| JP2002048985A | 2002-02-15 | |||
| JPH11174345A | 1999-07-02 | |||
| JP2001066522A | 2001-03-16 | |||
| JP2013088632A | 2013-05-13 | |||
| JP2015075713A | 2015-04-20 | |||
| JP2016224239A | 2016-12-28 |
Attorney, Agent or Firm:
HOSAKA Joyo (JP)
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