Genius Electronic Optical Co., Ltd.

Genius Electronic Optical (xiamen) Co., Ltd.

Coxon Precise Industrial Co., Ltd

Chun-Yang Huang

Wan-Chun Chen

Fu-Ping Shih

An ocular optical system configured to allow imaging rays from a display image to enter an observer's eye through the ocular optical system so as to form an image is provided. A direction toward the eye is an eye side, and a direction toward the display image is a display side. The ocular optical system sequentially includes a first and a second lens elements having refracting power from the eye side to the display side along an optical axis. Each lens element includes an eye-side surface and a display-side surface. An optical axis region of the eye-side surface of the first lens element is concave. An optical axis region of the eye-side surface of the second lens element is concave.

Ocular optical system

An optical imaging lens includes a first lens element, a second lens element, a third lens element and a fourth lens element. The first lens element has positive refracting power, an optical-axis region of the object-side surface of the second lens element is convex, a periphery region of the object-side surface of the second lens element is convex, and an optical-axis region of the image-side surface of the second lens element is convex. The Abbe number of the first lens element is &#x3c5;1, the Abbe number of the second lens element is &#x3c5;2 and the Abbe number of the third lens element is &#x3c5;3 to satisfy 61.119&#x2264;&#x3c5;1+&#x3c5;2+&#x3c5;3&#x2264;96.733.

Optical imaging lens

An ocular optical system configured to allow imaging rays from a display image to enter an observer's eye through the ocular optical system so as to form an image is provided. A direction toward the eye is an eye side, and a direction toward the display image is a display side. The ocular optical system sequentially includes a first and a second lens elements having refracting power from the eye side to the display side along an optical axis. Each lens element includes an eye-side surface and a display-side surface. An optical axis region of a display-side surface of the first lens element is convex. The display-side surface of the first lens element is a Fresnel surface. An optical axis region or a periphery region of a display-side surface of the second lens element is convex.

An optical imaging lens includes a first lens element, a second lens element, a third lens element and a fourth lens element. The first lens element has positive refracting power, an optical-axis region of the object-side surface of the second lens element is convex, a periphery region of the object-side surface of the second lens element is convex, and an optical-axis region of the image-side surface of the second lens element is convex. The Abbe number of the first lens element is &#x3bd;1, the Abbe number of the second lens element is &#x3bd;2 and the Abbe number of the third lens element is &#x3bd;3 to satisfy 61.119&#x2264;&#x3bd;1+&#x3bd;2+&#x3bd;3&#x2264;96.733.

An ocular optical system configured to allow imaging rays from a display frame to enter an observer's eye through the ocular optical system to form an image is provided. The ocular optical system includes a lens element having an eye-side surface and a display-side surface. The lens element has an optical axis extending from a display side toward an eye side. The display-side surface of the lens element adopts a Fresnel lens design. The ocular optical system satisfies: 4.317&#x2264;EFL/T&#x2264;12.463, where EFL represents an effective focal length of the ocular optical system, and Trepresents a thickness of the lens element on the optical axis.

An ocular optical system configured to allow imaging rays from a display frame to enter an observer's eye through the ocular optical system to form an image is provided. The ocular optical system includes a lens element having an eye-side surface and a display-side surface. The lens element has an optical axis extending from a display side toward an eye side. The display-side surface of the lens element adopts a Fresnel lens design. The display-side has a plurality of effective sub-surfaces and a plurality of ineffective sub-surfaces. The effective sub-surfaces are configured to allow the image rays to form an image. Each ineffective sub-surface connects two adjacent effective sub-surfaces. The ocular optical system satisfies: 25.000&#xb0;&#x2264;&#x3b1;&#x2264;52.000&#xb0;, where &#x3b1; represents a maximum tilting angle of the effective sub-surfaces relative to a reference plane perpendicular to the optical axis.

An optical imaging lens includes a first lens element, a second lens element, a third lens element and a fourth lens element. The optical-axis region of the image-side surface of the first lens element is concave, the periphery region of the image-side surface of the second lens element is convex, a third lens has positive refracting power and the optical-axis region of the object-side surface of the fourth lens element is convex. The Abbe number of the first lens element is &#x3c5;, the Abbe number of the second lens element is &#x3c5;, the Abbe number of the third lens element is &#x3c5;and the Abbe number of the fourth lens element is &#x3c5;to satisfy &#x3c5;&#x2264;30.000 and &#x3c5;&#x2264;120.000.

An ocular optical system configured to allow imaging rays from a display frame to enter an observer's eye through the ocular optical system to form an image is provided. The ocular optical system includes a lens element having an eye-side surface and a display-side surface. The lens element has an optical axis extending from a display side toward an eye side. The display-side surface of the lens element adopts a Fresnel lens design. The display-side has a plurality of effective sub-surfaces and a plurality of ineffective sub-surfaces. The effective sub-surfaces are configured to allow the image rays to form an image. Each ineffective sub-surface connects two adjacent effective sub-surfaces. The ocular optical system satisfies: 1.500&#x2264;R1/SagI&#x2264;4.000, where SagI is a total of lengths of orthogonal projections of the effective sub-surfaces respectively projected onto the optical axis, and R1 is a half of a clear aperture of the display-side surface.

A wide-angle lens is applicable to a head-mounted display having a display screen. The wide-angle lens includes a first lens having a positive refractive power and a second lens having a positive refractive power. Light emitted by the display screen passes to a user through the second lens and the first lens sequentially. The wide-angle lens satisfies the following conditions: where fand fare the focal lengths of the first lens and the second lens, respectively, and f is the focal length of the wide-angle lens. The wide-angle lens has a greater view angle and achieves better parallax correction.

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Taichung, Taiwan

Chun-Yang Huang