Modular Head-Mounted Lens Assembly with Adjustable Vision Correction
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Solution Overview
Problem
Existing head-mountable devices require customization for each user's facial features, making them costly and impractical to accommodate varying vision needs, as each user may require different levels of vision correction.
Innovation Solution
The integration of modular, adjustable lenses within the optical assembly of head-mountable devices, allowing for interchangeable lens assemblies that provide spherical and cylindrical vision correction, enabling users to achieve the desired vision correction without needing multiple devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If head-mountable devices are customized for each user's facial features and vision needs, then vision correction accuracy is improved, but device cost and complexity increase
Solution Approach 1:
The optical assembly is divided into separate modular lens components that can be independently selected and exchanged. Each lens module provides specific vision correction capabilities, allowing users to combine different lenses to achieve their required vision correction without customizing the entire device.
Solution Approach 2:
A single head-mountable device is designed to accommodate multiple lens assemblies with different vision correction properties. The universal mounting interface allows one device to serve multiple users with different vision needs by simply changing the lens assembly, eliminating the need for multiple customized devices.
2Measurement precision
If multiple customized devices are provided for different users, then vision correction needs are met, but cost and portability are worsened
Solution Approach 1:
The device incorporates a universal lens mounting system that accepts various lens assemblies designed for different vision correction requirements. This allows a single device to replace multiple customized devices by enabling users to swap lens assemblies according to their specific vision needs.
Solution Approach 2:
The lens assembly is designed to be dynamically exchangeable rather than fixed. The mounting mechanism allows for easy removal and replacement of lens assemblies, enabling the device to adapt to different users and vision correction requirements without requiring multiple permanent configurations.
3Ease of manufacture
If fixed lens assemblies are used in head-mountable devices, then manufacturing simplicity is improved, but adaptability to different vision needs deteriorates
Solution Approach 1:
The optical system is segmented into standardized lens assemblies that can be manufactured independently using standard processes. Each lens assembly is designed with a universal mounting interface, allowing simple mass production of individual lens modules while maintaining the ability to combine them for different vision correction needs.
Solution Approach 2:
The lens assemblies are designed with adjustable parameters such as focal length, curvature, and optical power that can be varied across different lens modules. This allows a single manufacturing process to produce multiple lens variants with different optical parameters, providing adaptability without requiring complex customization for each user.
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 solution allows for a single head-mountable device to accommodate different users' vision needs through adjustable lenses, reducing the need for multiple devices and enabling easy exchange of lens assemblies, thus providing a cost-effective and versatile solution for vision correction.
Implementation Method 1
The Alvarez lens can include a first lens and a second lens with identical, non-rotationally symmetric surfaces oriented in a complementary configuration. When the Alvarez lens is adjusted, the first lens and the second lens are displaced laterally in opposite directions.
Implementation Method 2
The cylindrical lens can include a first lens and a second lens with identical, rotationally symmetric surfaces. When the cylindrical lens is adjusted, the first lens and the second lens are rotated about an optical axis in opposite directions.
Implementation Method 3
The lenses can have lubricious coatings on surfaces of the lenses that are facing each other, the lubricious coatings having an index of refraction that does not exceed an index of refraction of the lenses.
Data Source
AI summary
A wearable electronic device can include an optical assembly that combines installable lens assemblies with built-in adjustable lenses that provide vision correction appropriate for any given user. By providing wearable electronic devices with modular features and adjustable vision correction, certain lens assemblies can provide the desired vision correction for any given user and facilitate exchange with a different lens assembly for a different user.