OST Near-Eye Display Lens Integrating Ophthalmic Correction
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Solution Overview
Problem
Existing wearable optical display systems do not effectively integrate ophthalmic correction, particularly multi-focal vision correction tailored to individual users, while maintaining an unobstructed field of regard.
Innovation Solution
A novel optical see-through near-eye display system incorporating a partially transmissive partially reflective lens with multi-focal zones for user-specific ophthalmic correction, combined with an electro-optical unit for projecting light beam images onto the lens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional single-power lens is used in wearable optical display systems, then the device complexity is reduced, but the ability to provide multi-focal ophthalmic correction tailored to individual users is lost
Solution Approach 1:
The lens incorporates different optical powers in different zones to provide localized correction for specific vision defects. The first zone has a first optical power for correcting distance vision, while the second zone has a second optical power for correcting near vision or other specific vision requirements, allowing tailored multi-focal correction without requiring multiple separate lenses
Solution Approach 2:
A single lens structure integrates multiple functions by combining different optical zones within one component. The lens simultaneously provides distance correction, near vision correction, and maintains an unobstructed field of regard, eliminating the need for multiple separate optical elements or devices
2Adaptability or versatility
If a multi-focal lens with multiple zones is integrated into the wearable optical display system, then user-specific ophthalmic correction is achieved, but the device complexity increases
Solution Approach 1:
The patent merges the display function and ophthalmic correction function into a single integrated lens structure. The multi-focal lens combines the augmented reality display optics with the vision correction optics, eliminating the need for separate correction lenses or multiple optical components, thereby reducing overall device complexity while maintaining user-specific correction capabilities
3Reliability
If the lens is designed to provide both reflected image correction and transmitted scene correction, then clear vision for both virtual and real objects is achieved, but the manufacturing precision requirements increase
Solution Approach 1:
The lens is divided into distinct optical zones with specific functions: a first zone for reflecting light beams to form virtual images with a first optical power, and a second zone for transmitting light from the real-world scene with a second optical power. This segmentation allows each zone to be optimized independently for its specific function while maintaining clear vision for both virtual and real objects
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides effective ophthalmic correction for both reflected light beam images and incoming light from the outward scene, ensuring clear vision and an unobstructed field of regard for the user.
Implementation Method 1
a partially transmissive partially reflective lens... configured to be facing the eye, and to at least partially transmit incoming light of an outward scene to the eye
Implementation Method 2
an inner surface having an inner surface radius of curvature exhibiting a first optical power, an outer surface having an outer surface varying radius of curvature exhibiting a second optical power
Data Source
AI summary
An optical see-through (OST) near-eye display (NED) system, integrating ophthalmic correction for an eye of a user, comprising: a partially transmissive partially reflective lens, including: an inner surface having an inner surface radius of curvature exhibiting a first optical power, an outer surface having an outer surface varying radius of curvature exhibiting a second optical power, and at least two zones, including a near vision zone characterized by a first progressive optical power, and a distant vision zone characterized by a second progressive optical power, wherein said partially transmissive partially reflective lens is configured to be facing said eye, and to at least partially transmit incoming light of an outward scene to said eye; and an electro-optical unit, configured to be optically coupled with said partially transmissive partially reflective lens, said electro-optical unit including a light display configured to project a light beam image onto said inner surface, so to enable reflection of said light beam image toward said eye, said electro-optical unit is configured to be located at a glabellar region of said user, wherein said first optical power is configured to provide ophthalmic correction with respect to reflected said light beam image for viewing by said eye, wherein said second optical power and said first progressive power, and said second progressive optical power are configured to provide ophthalmic correction with respect to transmitted said incoming light from said outward scene for viewing by said eye.