Title:
OPTICAL SYSTEM, OPTICAL DEVICE, AND METHOD FOR MANUFACTURING OPTICAL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2022/215380
Kind Code:
A1
Abstract:
Provided are an optical system having a short optical total length, an optical device, and a method for manufacturing the optical system. An optical system OL comprises, in order from the object side, a front group GA, an aperture stop S, and a back group GB having positive refractive power, and satisfies the condition of the following expression. 0.100 < LA/LB < 0.400 where LA is the distance on an optical axis from a lens surface closest to the object side to a lens surface closest to the image side in the front group GA when focusing at infinity, and LB is the distance on the optical axis from a lens surface closest to the object side to a lens surface closest to the image side in the back group GB when focusing at infinity.
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Inventors:
HARADA HIROKI (JP)
Application Number:
PCT/JP2022/007509
Publication Date:
October 13, 2022
Filing Date:
February 24, 2022
Export Citation:
Assignee:
NIKON CORP (JP)
International Classes:
G02B13/00; G02B13/04; G02B13/18
Domestic Patent References:
| WO2018207238A1 | 2018-11-15 |
Foreign References:
| JP2013137377A | 2013-07-11 | |||
| JP2019023693A | 2019-02-14 | |||
| JP2016173397A | 2016-09-29 | |||
| JP2015034899A | 2015-02-19 | |||
| JP2016090725A | 2016-05-23 | |||
| JP2018060003A | 2018-04-12 | |||
| JP2012063676A | 2012-03-29 |
Attorney, Agent or Firm:
HOSAKA Joyo (JP)
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