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Title:
OPTICAL SYSTEM AND OPTICAL DEVICE
Document Type and Number:
Japanese Patent JP2022176366
Kind Code:
A
Abstract:
To provide an optical system which offers a good optical performance, and an optical device having the same.SOLUTION: An optical system OL substantially consists of two lens groups comprising, in order from an object side, a first lens group G1 having a first negative meniscus lens L11, a second negative meniscus lens L12, and a third negative meniscus lens L13, and a rear group GR disposed on an image-plane side of the first lens group G1 and provided with a focusing lens group Gfo configured to move along an optical axis direction when focusing. The optical system is configured to satisfy conditions represented by given conditional expressions.SELECTED DRAWING: Figure 1

Inventors:
Hiroshi Himoto
Application Number:
JP2022162073A
Publication Date:
November 25, 2022
Filing Date:
October 07, 2022
Export Citation:
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Assignee:
NIKON CORPORATION
International Classes:
G02B13/04; G02B13/00; G02B13/18
Domestic Patent References:
JP2017161685A2017-09-14
JP2017015941A2017-01-19
JP2015034892A2015-02-19
JP2007094174A2007-04-12
Attorney, Agent or Firm:
Takeyo Hosaka
Kei Iwasaki



 
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