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公开(公告)号：US12256892B2
公开(公告)日：2025-03-25
申请号：US17731516
申请日：2022-04-28
Applicant: OLYMPUS CORPORATION
Inventor： Takehiro Miki
Abstract: An optical system includes a plurality of lenses. The plurality of lenses have refractive index distributions in which a refractive index changes in directions orthogonal to optical axes. The optical axes of the plurality of lenses are disposed on the same straight line as each other. The plurality of lenses are manufactured on the basis of same design values relating to an on-axis refractive index and a refractive index distribution constant. When rotation positions around the optical axes of the plurality of lenses at which a total aberration amount of the plurality of lenses reaches a maximum are set as reference rotation positions for the plurality of lenses, any one of the plurality of lenses is arranged at a position acquired by relatively rotating the reference rotation position around the optical axis.
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公开(公告)号：US11931004B2
公开(公告)日：2024-03-19
申请号：US17137574
申请日：2020-12-30
Applicant: OLYMPUS CORPORATION
Inventor： Takehiro Miki , Keiichiro Nakajima , Mitsuru Namiki
CPC classification number: A61B1/0019 , A61B1/00195 , G02B9/06 , G02B9/58 , G02B23/243
Abstract: Provided is an objective optical system including: a first spherical lens and a second spherical lens that are arrayed in this order from an object; and at least one of a first optical medium and a second optical medium, wherein the first optical medium is a solid or liquid disposed at an object side of the first spherical lens and is in close contact with a surface on the object side of the first spherical lens, over an entire optical path; and the second optical medium is a solid or liquid disposed at an opposite side of the second spherical lens from the object and is in close contact with a surface on the opposite side of the second spherical lens from the object, over the entire optical path.
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