Invention Publication
- Patent Title: VARIABLE MAGNIFICATION OPTICAL SYSTEM, OPTICAL APPARATUS, AND METHOD FOR MANUFACTURING VARIABLE MAGNIFICATION OPTICAL SYSTEM
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Application No.: US18290303Application Date: 2022-03-02
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Publication No.: US20240264418A1Publication Date: 2024-08-08
- Inventor: Takuro ONO , Kosuke MACHIDA , Ayumu MAKIDA , Keisuke TSUBONOYA
- Applicant: NIKON CORPORATION
- Applicant Address: JP Minato-ku, Tokyo
- Assignee: NIKON CORPORATION
- Current Assignee: NIKON CORPORATION
- Current Assignee Address: JP Minato-ku, Tokyo
- Priority: JP 21096938 2021.06.09
- International Application: PCT/JP2022/008965 2022.03.02
- Date entered country: 2023-11-12
- Main IPC: G02B15/14
- IPC: G02B15/14 ; G02B15/16

Abstract:
A variable magnification optical system including a plurality of lens groups, which is six or more lens groups and comprises a first lens group having positive refractive power and a rear group disposed closer to an image side than the first lens group, is configured so that at varying magnification the distances between the lens groups are varied, the first lens group consists of two or fewer lenses, and both the following conditional expressions are satisfied:
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