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US 9,314,158 B2Granted
Ophthalmologic apparatus, control method
AssigneeCanon Kabushiki Kaisha
InventorHiraku Ogura
Life of this patent
Estimating the term…
Abstract
An ophthalmologic apparatus includes a focusing lens provided in an optical path connecting a subject's eye and an imaging unit, a diopter correction lens provided in the optical path to be insertable and removable, and a position determination unit configured to determine a position of the focusing lens on the optical path in a state where the diopter correction lens is inserted, based on an in-focus state where the diopter correction lens is not inserted.
Claims16
An ophthalmologic apparatus comprising:
- a focusing lens provided in an optical path connecting a subject's eye and an imaging unit;
- a diopter correction lens configured to be insertable into and removable from the optical path;
- and
- a position determination unit configured to determine a position of the focusing lens in the optical path in a state where the diopter correction lens is inserted into the optical path, based on a focus state between the imaging unit and a fundus of the subject's eye where the diopter correction lens is not inserted into the optical path.
1 more element
A control method comprising:
- arranging a focusing lens in an optical path connecting a subject's eye and an imaging unit;
- providing a diopter correction lens configured to be insertable into and removable from the optical path;
- detecting a focus state where the diopter correction lens is not inserted into the optical path connecting a subject's eye and an imaging unit;
- and
- determining a position of the focusing lens in the optical path in a state where the diopter correction lens is inserted into the optical path, based on the detected focus state between the imaging unit and a fundus of the subject's eye where the diopter correction lens is not inserted into the optical path.
2 more elements
Dependencies are inferred from the claim text.