Title:
OPTICAL SYSTEM, OPTICAL DEVICE, AND METHOD FOR MANUFACTURING OPTICAL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2024/034428
Kind Code:
A1
Abstract:
Provided are an optical system that achieves reductions in size and weight and can obtain satisfactory optical performance, an optical device, and a method for manufacturing the optical system. An optical system OL used in an optical device such as a camera 1 comprises, in order from the object side, a first lens group G1 having positive refractive power, a second lens group G2 having negative refractive power, a third lens group G3 having positive refractive power, a fourth lens group G4 having negative refractive power, and a fifth lens group G5 having positive refractive power, the distance between the lens groups adjacent to each other changing when the magnification is changed, and the second lens group G2 being fixed with respect to an image surface when the magnification is changed, and the optical system satisfies a condition based on a predetermined conditional expression.
Inventors:
MIWA SATOSHI (JP)
Application Number:
PCT/JP2023/027689
Publication Date:
February 15, 2024
Filing Date:
July 28, 2023
Export Citation:
Assignee:
NIKON CORP (JP)
International Classes:
G02B15/20; G02B13/18
Domestic Patent References:
| WO2016157339A1 | 2016-10-06 |
Foreign References:
| JP2014044246A | 2014-03-13 | |||
| JP2020154288A | 2020-09-24 | |||
| JP2010204178A | 2010-09-16 | |||
| JP2004233750A | 2004-08-19 | |||
| JP2008152190A | 2008-07-03 | |||
| JP5781244B2 | 2015-09-16 |
Attorney, Agent or Firm:
HOSAKA Joyo (JP)
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