| 发明名称 |
EYEPIECE OPTICAL SYSTEM AND OPTICAL APPARATUS |
| 摘要 |
Providing an eyepiece optical system 10 comprising: an eyepiece system 11; and an optical member 12 having a meniscus shape disposed to an eye side of the eyepiece system 11, the following conditional expression being satisfied:;2.00<|R|/fe<22.00;where fe denotes a focal length of the eyepiece system 11 when a diopter of the eyepiece system 11 is 0 (m−1), and R denotes a radius of curvature of the surface having the meniscus shape, and the optical member 12 with a meniscus shape having a concave surface facing the eye side. |
| 申请公布号 |
US2015077858(A1) |
申请公布日期 |
2015.03.19 |
| 申请号 |
US201414492032 |
申请日期 |
2014.09.21 |
| 申请人 |
Nikon Corporation |
发明人 |
Mouri Motohisa;Matsuo Taku;Kubota Yukio;Sato Takuya |
| 分类号 |
G02B25/00;G02B13/18 |
主分类号 |
G02B25/00 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. An eyepiece optical system comprising:
an eyepiece system; and an optical member disposed to an eye side of the eyepiece system, the optical member having a meniscus shape at least on a periphery thereof and the following conditional expression being satisfied:
2.00<|R|/fe<22.00 where fe denotes a focal length of the eyepiece system when diopter of the eyepiece system is 0 (m−1), and R denotes a radius of curvature of at least one surface of the meniscus shaped portion of the optical member. |
| 地址 |
Tokyo JP |
