OCULAR LENS SYSTEM, AND IMAGE OBSERVATION DEVICE

The present invention addresses the problem of achieving an eyepiece lens system having a large amount of allowable eccentricity. This eyepiece system forms a magnified virtual image of an observation object, and the eyepiece system has a horizontal angle of view of 40 degrees or more. The maximum a...

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Bibliographic Details
Main Authors ISHIZUKA, Kenichi, UEMURA, Kamon
Format Patent
LanguageEnglish
French
German
Published 06.11.2019
Subjects
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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Summary:The present invention addresses the problem of achieving an eyepiece lens system having a large amount of allowable eccentricity. This eyepiece system forms a magnified virtual image of an observation object, and the eyepiece system has a horizontal angle of view of 40 degrees or more. The maximum amount of eccentricity S that makes the proportion of the amount of change, ” mm, in tangential field curvature in the amount of eccentricity, S mm, between the optical axis Ax and an observer's eye satisfy Condition (1), namely, -0.25 < ”/S < 0, at all image heights is 3 mm or more.
Bibliography:Application Number: EP20140835035