Eyepiece and display device including eyepiece
AssigneeZhejiang Sunny Optical Co., Ltd
InventorsLitong Song, Lin Huang
Life of this patent
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Abstract
The present disclosure provides an eyepiece and a display device including the eyepiece. The eyepiece includes a lens. The lens has a first surface and a second surface opposite to the first surface. The first surface is a corresponding surface of an eye side, and the second surface is a corresponding surface of a display element side. In addition, the first surface is a Fresnel structure surface, and the second surface is an aspheric curved surface. The Fresnel structure surface includes multiple annular sections arranged in sequence to form a serrated surface. An effective focal length EFL of the lens satisfies: 35 mm<EFL<45 mm.
Claims17
An eyepiece, comprising a lens, having a first surface corresponding to an eye side and a second surface opposite to the first surface,
- wherein the first surface is a Fresnel structure surface, and the second surface is an aspheric curved surface;
- the Fresnel structure surface comprises a plurality of annular sections arranged in sequence to form a serrated surface;
- and
- an effective focal length EFL of the lens satisfies:
- 35 mm<EFL<45 mm,
- wherein the plurality of annular sections in the Fresnel structure surface of the first surface of the lens are arranged on a base surface, and the base surface is a concave surface.
An eyepiece, comprising a lens, having a first surface corresponding to an eye side and a second surface opposite to the first surface,
- wherein the first surface is a Fresnel structure surface;
- the Fresnel structure surface comprises a plurality of annular sections arranged in sequence to form a serrated surface, and each of the plurality of annular sections is composed of a working surface and a non-working surface;
- and
- a center thickness CT of the lens and an effective outer diameter DY of the lens satisfy:
- 0.08<CT/DY<0.4,
- wherein the plurality of annular sections in the Fresnel structure surface are arranged on a base surface, and the base surface is a concave surface.
A display device, comprising an eyepiece,
- wherein the eyepiece comprising a first lens or a second lens,
- wherein the first lens has a first surface corresponding to a first eye side and a second surface opposite to the first surface,
- wherein the first surface is a first Fresnel structure surface, and the second surface is an aspheric curved surface;
- the first Fresnel structure surface comprises a plurality of first annular sections arranged in sequence to form a first serrated surface;
- and
- an effective focal length EFL of the first lens satisfies:
- 35 mm<EFL<45 mm;
- wherein the plurality of first annular sections in the first Fresnel structure surface are arranged on a first base surface, and the first base surface is a concave surface;
- wherein the second lens has a third surface corresponding to a second eye side and a fourth surface opposite to the third surface,
- wherein the third surface is a second Fresnel structure surface;
- the second Fresnel structure surface comprises a plurality of second annular sections arranged in sequence to form a second serrated surface, and each of the plurality of second annular sections is composed of a working surface and a non-working surface;
- and
- a center thickness CT of the second lens and an effective outer diameter DY of the second lens satisfy:
- 0.08<CT/DY<0.4,
- wherein the plurality of second annular sections in the second Fresnel structure surface are arranged on a second base surface, and the second base surface is a concave surface.
Dependencies are inferred from the claim text.