Segmented Spectacle Lens for AR Display Manufacturing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The production of spectacle lenses with buried reflective surfaces is complex due to their design, making them difficult to manufacture effectively.
Innovation Solution
The spectacle lens is divided transversely into two partial lenses with contact surfaces extending along a second direction, allowing for easy formation and secure connection of the decoupling section, which can include reflective surfaces, and can be glued or cemented together, facilitating the production process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the decoupling section has at least one reflective surface embedded in the lens, then the image generation function is achieved, but the manufacturing complexity increases
Solution Approach 1:
The spectacle lens is divided into a first partial spectacle lens and a second partial spectacle lens that can be separately manufactured and then assembled together. The decoupling section with reflective surfaces is formed in one partial lens, while the other partial lens connects through contact surfaces, enabling modular production that reduces overall manufacturing complexity while maintaining the embedded reflective surface functionality.
2Ease of manufacture
If the spectacle lens is divided into partial lenses, then the ease of manufacture improves, but the connection reliability between parts may be compromised
Solution Approach 1:
The first and second partial spectacle lenses are joined together through contact surfaces that extend from the edge of the spectacle lens along a predetermined length. These contact surfaces can be glued or cemented together, creating a secure connection that maintains structural integrity and reliability while allowing the decoupling section to be easily formed in the segmented components.
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
This design simplifies the production of spectacle lenses by allowing for easier formation and secure connection of the decoupling section, enabling efficient manufacturing while maintaining reflective properties for image generation.
Implementation Method 1
Light guidance within the light channel can be achieved, for example, by reflection at the front and back surfaces of the lens. This can involve total internal reflection or reflection due to a partial or reflective coating.
Implementation Method 2
Light guidance within the light channel can be achieved, for example, by reflection at the front and back surfaces of the lens. This can involve total internal reflection or reflection due to a partial or reflective coating.
Implementation Method 3
The light-guiding channel can be formed, for example, by a difference in the refractive index between the lens parts and the surrounding environment.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a spectacle lens for a display device (1) which can be placed on the head of a user and which generates an image. The spectacle lens (3) has a front face (18), a rear face (15), an edge (21) which connects the front and rear face (18, 15), an in-coupling portion (11), an out-coupling portion (13) which is spaced from the in-coupling portion (11), and a light guiding channel (12). The light guiding channel is suitable for guiding light bundles (9) of pixels of the generated image in the spectacle lens (3) along a first direction to the out-coupling portion (13), said light bundles being coupled into the spectacle lens (3) via the in-coupling portion (11) of the spectacle lens (3), and the light bundles are coupled out of the spectacle lens (3) from the out-coupling portion. The spectacle lens (3) is designed in multiple parts and has a first sub-spectacle lens (19) and a second sub-spectacle lens (20) which is connected to the first sub-spectacle lens. The light guiding channel (12) runs in the first sub-spectacle lens (19), and the two sub-spectacle lenses (19, 20) are connected together via contact surfaces (24, 25, 26, 27) which extend from the front face (18) to the rear face (15) and from the edge (21) of the spectacle lens (3) along a specified length in a second direction that runs transversely to the first direction.