Title:
OBSERVATION OPTICAL SYSTEM AND OPTICAL DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/218819
Kind Code:
A1
Abstract:
Provided is an observation optical system (LS1) that has, in the stated order from the object side, an objective optical system (OBL1), an erecting prism (PR1) for erecting an image formed by the objective optical system (OBL1), and an eyepiece optical system (EPL1) for observing the image formed by the objective optical system (OBL1) erected by the erecting prism (PR1), and that performs image correction by rotating the erecting prism (PR1) from a prescribed position, the center of rotation about which the erecting prism (PR1) is rotated being positioned in a distance range that is no more than one fourth the length of the erecting prism (PR1) in a direction along the optical axis (Z12) of the objective optical system (OBL1) from the position of the intersection of the plane of the erecting prism (PR1) closest to the objective optical system and the optical axis (Z11) of the objective optical system (OBL1) when the erecting prism (PR1) is in the aforementioned prescribed position.
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Inventors:
TOMITA KATSUNORI (JP)
Application Number:
PCT/JP2023/014333
Publication Date:
November 16, 2023
Filing Date:
April 07, 2023
Export Citation:
Assignee:
NIKON VISION CO LTD (JP)
International Classes:
G02B23/02; G02B25/00; G03B5/00
Foreign References:
| JPS5423554A | 1979-02-22 | |||
| JP2015143728A | 2015-08-06 | |||
| US20160011433A1 | 2016-01-14 |
Attorney, Agent or Firm:
OHNISHI, Shogo et al. (JP)
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