OCULAR LENS

WIPO Patent Application WO/2018/068356

A1

Disclosed is an ocular lens, composed of a lens. The lens includes a first surface (S1) and a second surface (S2) which are opposite each other, the first surface (S1) being a curved surface, and the second surface (S2) being a Fresnel-structure surface. The Fresnel-structure surface is composed of multiple annular strips arranged in sequence, and forms a sawtooth-shaped surface, wherein each of the annular strips is composed of a working surface (Sa) and a non-working surface (Sb), the working surface being an aspherical surface, and the non-working surface (Sb) being a straight oblique surface. The ocular lens satisfies the following conditional expressions: 85° < FOV < 130°, and 0° ≤ θi ≤ 5°, where FOV is the largest field-of-view angle of the ocular lens, and θi is an included angle between a non-working surface (Sb) of an ith annular strip (Ci) and an optical axis. The ocular lens uses a single lens, with one surface being a curved surface and the other being of a Fresnel lens structure, has a larger field-of-view angle, effectively corrects aberration, improves the imaging quality and obtains a larger relative lens-to-eye distance.

SONG LITONG (CN)
DAI FUJIAN (CN)
JIN YINFANG (CN)

PCT/CN2016/105407

April 19, 2018

November 11, 2016

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ZHEJIANG SUNNY OPTICS CO LTD (CN)

G02B3/08; G02B25/04; G02B27/01

CN106019567A	2016-10-12
CN101978304A	2011-02-16
CN106291940A	2017-01-04
CN205958837U	2017-02-15
CN104898283A	2015-09-09
CN1196496A	1998-10-21
CN104823079A	2015-08-05
JPH10228245A	1998-08-25
JP2004347823A	2004-12-09

BEIJING HUIZE INTELLECTUAL PROPERTY LAW LLC (CN)

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