Diffractive Corrective Lens Preventing Optical Component Occlusion
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Solution Overview
Problem
Wearable devices with corrective lenses and optical components, such as eye tracking systems, face challenges due to the interference of lens edges with camera and light source operations, leading to inaccurate eye tracking, especially with thicker lens edges common in stronger prescription lenses. Additionally, existing device pairing methods can be cumbersome for users, particularly those who are not tech-savvy, resulting in failed connections and user dissatisfaction.
Innovation Solution
The integration of diffractive surfaces on corrective lenses with thin edges to prevent occlusion of optical components, combined with a pre-pairing method using a wired connection to store pairing information in permanent memory, allowing for subsequent wireless connection without the need for complex user interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If thicker lens edges are used for stronger prescription lenses, then corrective power is improved, but occlusion of optical components (camera and light source) occurs leading to inaccurate eye tracking
Solution Approach 1:
The patent transitions from conventional refractive lenses to diffractive optical elements that operate in a different dimensional approach to light manipulation. The diffractive surface uses micro-structured patterns etched into the lens surface to achieve prescription power without requiring thick edges, thereby eliminating occlusion of the optical components while maintaining corrective functionality.
Solution Approach 2:
The patent changes the fundamental optical parameter from refraction-based power correction to diffraction-based power correction. By etching diffractive patterns with specific pitch and depth parameters into the lens surface, the system achieves the required optical power with thin lens edges, preventing interference with the camera and light source operations.
2Reliability
If conventional pairing methods are used, then device connection is achieved, but complex user interactions are required leading to user dissatisfaction and connection failures
Solution Approach 1:
The patent implements preliminary pairing actions during the manufacturing process. Devices are pre-paired at the factory with encrypted pairing information stored in secure memory, eliminating the need for complex user-side pairing procedures. This preliminary action ensures reliable connection establishment while maintaining security through encrypted credentials that are exchanged automatically during initial setup.
Solution Approach 2:
The system enables self-service pairing where devices automatically authenticate and connect using pre-configured credentials without requiring manual user intervention. The encrypted pairing information stored in secure memory allows devices to perform self-verification and establish connections autonomously, greatly simplifying the user experience while maintaining connection reliability.
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
Accurate eye tracking is ensured by minimizing lens edge interference with optical components, and simplified device pairing reduces connection failures, enhancing user experience and satisfaction by automating the pairing process.
Implementation Method 1
a corrective lens including a diffractive surface, the diffractive surface having features structured to provide a certain correction level
Data Source
AI summary
According to examples, a wearable device may include a frame and a prescription lens mounted to the frame, in which the corrective lens may include a diffractive surface having features structured to have a certain correction level. The wearable device may also include at least one optical component mounted to the frame, the at least one optical component being positioned immediately adjacent to the corrective lens, in which the diffractive surface of the corrective lens causes the corrective lens to have a sufficiently thin edge to prevent the edge of the corrective lens from occluding the at least one optical component.