Nikon Corporation

Yukio Kubota

Takuya Sato

Taku Matsuo

Motohisa Mouri

Satoshi Ejima

Masakazu Sekiguchi

Takeo Motohashi

Hiroki Ono

Mitsuko Matsumura

Koichi Abe

Kaoru Yoshino

Satoshi Tsuchiya

Provided is an eyepiece optical system including at least three lenses disposed in order from an observation object (Ob) along an optical axis. A final lens disposed closest to an eye point (EP) (corresponds to the third lens (L) in FIG.) is fixed when adjusting the diopter, and the following conditional expressions (1) and (2) are satisfied:2.2&#x3c;|&#x3c;6.0&#x2003;&#x2003;(1)0.5&#x3c;|2/|&#x3c;5.0&#x2003;&#x2003;(2)

Eyepiece optical system, optical apparatus and method for manufacturing eyepiece optical system

Provided is an eyepiece optical system including at least three lenses disposed in order from an observation object (Ob) along an optical axis. A final lens disposed closest to an eye point (EP) (corresponds to the third lens (L) in FIG.) is fixed when adjusting the diopter, and the following conditional expressions (1) and (2) are satisfied:2.2&#x3c;||&#x3c;6.0&#x2003;&#x2003;(1)0.5&#x3c;|2/|&#x3c;5.0&#x2003;&#x2003;(2)

To improve the usability of an electronic device, the electronic device includes: a first communication unit located near a user; a receive unit configured to receive data through communication via a body of the user or near field communication between a second communication unit located in a member used by the user and the first communication unit; and a recording unit configured to record data pertaining to the member when communication is established between the first communication unit and the second communication unit.

Electronic device

An image processing device includes: an image processing unit that alters an image by executing first image processing and second image processing on the image; and a processing change unit that changes an extent to which the image is altered through the first image processing and an extent to which the image is altered through the second image processing. The processing change unit raises the extent to which the image is altered through the second image processing when the extent to which the image is altered through the first image processing is lowered.

Image processing device that changes extent of image altering by first and second image processing

Providing an eyepiece optical systemcomprising: an eyepiece system; and an optical memberhaving a meniscus shape disposed to an eye side of the eyepiece system, the following conditional expression being satisfied:2.00&#x3c;||/fe&#x3c;22.00where fe denotes a focal length of the eyepiece systemwhen a diopter of the eyepiece systemis 0 (m), and R denotes a radius of curvature of the surface having the meniscus shape, and the optical memberwith a meniscus shape having a concave surface facing the eye side.

Growing community of inventors

Tsurugashima, Japan

Yukio Kubota