Optical system and head-mounted electronic device

Through the folded optical path design and multi-layer polarization film structure optical system, the problem that existing head-mounted electronic devices cannot adjust the focal length according to vision conditions is solved, and myopia compensation and imaging quality are improved, and it is suitable for head-mounted display applications such as virtual reality.

CN120469087APending Publication Date: 2025-08-12INTERFACE OPTOELECTRONICS (SHENZHEN) CO LTD +2
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Patent Information

Application Number
CN202510764403.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-09
Publication Date
2025-08-12

AI Technical Summary

Technical Problem

The optical systems of existing head-mounted electronic devices cannot adjust the focal length according to user's vision conditions, resulting in additional corrective glasses for groups such as myopia, hyperopia or astigmatism, which affects the comfort of wearing and occlusion of vision. The folding optical structure is insufficient in terms of vision compensation and focus flexibility.

Method used

The folded optical path design and phase delay element configuration are adopted, including the first mirror group, the second mirror group, the second phase delay element and the image source surface. Through the multi-layer polarization film structure and optical parameter design, the optical path folding and vision compensation are realized, providing myopia compensation function, and improving imaging quality and use comfort.

Benefits of technology

While shortening the thickness of the device, myopia vision compensation of 0 to 800 degrees is achieved, improving the wear experience, improving imaging quality, reducing ghosting and imaging deviations, and maintaining optical stability under different vision conditions.

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Abstract

The invention relates to the field of optics, and provides an optical system and a head-mounted electronic device. The optical system sequentially comprises a first lens group, a second lens group, a second phase delay element and an image source surface from an eye side to an image source side, the first lens group comprises a diaphragm, a first phase delay element and a first lens with negative refractive power, and the second lens group comprises a second lens and a partial reflection element. And the radius of curvature R1 of the eye-side surface of the first lens satisfies a specific range condition. The head-mounted electronic device comprises a shell, the optical system arranged on the shell, and a display module arranged at the position of the image source surface. According to the head-mounted display device, light path folding is carried out through the phase delay element and the partial reflection element, the overall thickness can be reduced, the myopia compensation function is provided through the relative design of the lens group, and then the imaging quality and wearing comfort of the head-mounted display device are improved.
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