EYEPIECE OPTICAL SYSTEM AND OPTICAL DEVICE

摘要

An eyepiece optical system (10) is provided which includes an eyepiece lens system (11) and an optical member (12) that is meniscus-shaped on the eye side of the eyepiece lens system (11). This eyepiece optical system (10) satisfies the condition 2.00 < |R|/fe < 22.00, where fe is the focal length of the eyepiece lens system (11) when the diopter of the eyepiece lens system (11) is 0 [m-1], and R is the radius of curvature of the meniscus-shaped surface. The meniscus-shaped optical member (12) is arranged so that the concave surface is facing the eye side.