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US 2026/0244004 A1Published application
Optical system, optical apparatus, and method for manufacturing optical system
AssigneeNikon Corporation
InventorKeigo KOIDA
Life of this patent
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AssigneeNikon Corporation
InventorKeigo KOIDA
Estimating the term…
An optical system having an image pickup magnification of 0.5× or more and capable of ensuring favorable optical performance while achieving weight and size reduction, an optical apparatus, and a method for manufacturing the optical system are provided. An optical system OL included in an optical apparatus such as a camera 1 includes a front group GF, an intermediate group GM, and a rear group GR sequentially from an object side, the intermediate group GM moves in an optical axis direction at focusing, and the optical system OL satisfies a condition expressed by an expression below, 0.54 < d 1 / f < 1. in the expression, d1: distance on an optical axis from a lens surface closest to an image plane side in the front group GF to a lens surface closest to the object side in the intermediate group GM at focusing on an infinite distance object, and f: overall focal length of the optical system OL at focusing on an infinite distance object.
An optical system comprising a front group, an intermediate group, and a rear group sequentially from an object side, wherein
An optical system comprising a front group, an intermediate group, and a rear group sequentially from an object side, wherein
A method for manufacturing an optical system including a front group, an intermediate group, and a rear group sequentially from an object side, the method comprising:
A method for manufacturing an optical system including a front group, an intermediate group, and a rear group sequentially from an object side, the method comprising:
Dependencies are inferred from the claim text.