Title:
変倍光学系、光学装置、および変倍光学系の製造方法
Document Type and Number:
Japanese Patent JP7063340
Kind Code:
B2
Abstract:
This variable magnification optical system comprises multiple lens groups, and the intervals between the lens groups change during variable magnification. The multiple lens groups include an object-side focusing lens group which moves during focusing, and at least one image-side focusing lens group which is arranged on the image side of the object-side focusing lens group and which during focusing moves on a trajectory different from that of the object-side focusing lens group. At least one of the object-side focusing lens group and image-side focusing lens group has at least one lens having a negative refractive power, and by satisfying a prescribed conditional expression, the variable magnification optical system favorably suppresses aberration fluctuation when changing magnification from a wide-angle end state to a telephoto end state and aberration fluctuation when focusing from an object at infinity to an object at close range.
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Inventors:
Kosuke Machida
Application Number:
JP2019553669A
Publication Date:
May 09, 2022
Filing Date:
November 20, 2017
Export Citation:
Assignee:
NIKON CORPORATION
International Classes:
G02B15/20
Domestic Patent References:
| JP2016139125A | ||||
| JP2017129668A | ||||
| JP2014102462A | ||||
| JP2015118141A | ||||
| JP2015215438A | ||||
| JP2012083726A |
Attorney, Agent or Firm:
Inoue International Patent and Trademark Office