Patent ID: 11971530
Assignee: FUJIFILM CORPORATION
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 4:
5. A method of operating an observation apparatus, the method comprising:
acquiring positional information indicating a position of a bottom surface of a support for supporting an observation target by an acquisition unit;
forming an optical image showing the observation target supported by the support on an image plane by an imaging optical system;
adjusting a focal position of the imaging optical system by a focus adjustment unit based on the positional information acquired by the acquisition unit;
performing control for matching an inclination of the image plane on which the optical image is formed to an inclination of an imaging surface of an imaging element by a control unit based on the positional information acquired by the acquisition unit,
wherein the imaging optical system further includes a ray deflection optical system that deflects a ray by a plurality of wedge prisms in an optical axis direction of the imaging optical system,
performing control for deflecting the ray by controlling a rotation mechanism that independently rotates the plurality of wedge prisms about an optical axis by the control unit, the plurality of wedge prisms including a first wedge prism, a second wedge prism, and a third wedge prism, and
performing first correction control for correcting an overall inclination of the image plane on the first wedge prism and performing second correction control for correcting a partially changing inclination of the image plane on the second wedge prism and the third wedge prism.