Optical module and smart head-mounted device
By employing plano-concave lenses and optical path folding design in the HMD optical module, combined with beam splitting elements, phase delayers, and polarization reflection elements, the problems of large optical module weight and ghosting have been solved, achieving a reduction in overall optical length and lens weight, and improving imaging quality and user experience.
CN119270509BActive Publication Date: 2026-05-01GOERTEK OPTICAL TECHNOLOGY (QINGDAO) CO LTD
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Patent Information
- Application Number
- CN202411498292.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2026-05-01
- Estimated Expiration
- 2044-10-24
AI Technical Summary
Technical Problem
Existing head-mounted display (HMD) optical modules suffer from problems such as heavy weight, excessive optical length, and susceptibility to ghosting, which affect image quality and user experience.
Method used
It adopts a plano-concave lens design, combined with a beam splitter, a phase delayer and a polarization reflection element, and achieves optical path folding through air gaps, optimizing the lens focal length and radius of curvature, and reducing the total weight and optical length of the lens.
Benefits of technology
While ensuring image quality, the size and weight of the optical module are significantly reduced, effectively suppressing ghosting and improving the user experience.
✦ Generated by Eureka AI based on patent content.
Abstract
The embodiment of the application provides an optical module and a smart head-mounted device; the optical module comprises a display screen, a first lens and a second lens arranged along the same optical axis; wherein the first lens is located between the display screen and the second lens, the first lens is a flat-concave lens, and the flat surface of the first lens is glued to the display screen; a light splitting element is arranged on the surface of the first lens away from the display screen, a phase retarder and a polarization reflection element are stacked on the surface of the second lens close to the display screen, and the phase retarder is located between the light splitting element and the polarization reflection element.
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