Movable Lens Segment Spectacles for Dynamic Visual Point Tracking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current spectacle lenses are not adequately adapted to the wearer's current visual point when the eyes move independently of the head, leading to difficulties for first-time users of varifocal glasses in maintaining clear vision.
Innovation Solution
The design incorporates a spectacle lens with a carrier lens and a movable lens segment, guided by an eye position detection device and drive control system, allowing the lens segment to track the wearer's gaze movements, ensuring the visual point remains consistent through mechanical entrainment of the optics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed multifocal lens design is used, then manufacturing is simplified, but the lens cannot adapt to the wearer's current visual point when eyes move independently of the head
Solution Approach 1:
The lens is divided into a carrier lens and a movable lens segment that can be independently positioned. This segmentation allows the lens to adapt to different visual points by moving the segment, while each individual component remains relatively simple in structure.
Solution Approach 2:
The lens segment is made movable relative to the carrier lens, transforming the static lens design into a dynamic one. This allows the optical properties to change based on the wearer's eye position, improving adaptability while maintaining manageable complexity through controlled movement mechanisms.
2Adaptability or versatility
If the lens segment is made movable to track eye movements, then visual point adaptation is improved, but mechanical alignment reliability becomes more challenging
Solution Approach 1:
The lens segment is pre-guided within defined movement paths and constraints on the carrier lens. This preliminary structuring of movement options ensures that the segment maintains proper mechanical alignment throughout its range of motion, preventing misalignment while allowing necessary adaptability.
Solution Approach 2:
The system uses an eye position detection device to detect the wearer's eye position and a drive control device to adjust the lens segment position accordingly. This feedback loop ensures the lens segment responds accurately to eye movements, maintaining reliable alignment with the visual point.
3Ease of operation
If varifocal lenses are designed for a fixed visual point, then manufacturing precision is easier to achieve, but first-time wearers must relearn how to see when their eyes move naturally
Solution Approach 1:
The lens transitions from a static optical design to a dynamic one where the lens segment can be repositioned based on detected eye position. This allows the optical precision to be maintained at the current visual point while accommodating natural eye movements, improving ease of operation without sacrificing manufacturing precision.
Solution Approach 2:
The system changes the positional parameters of the lens segment relative to the carrier lens based on eye position detection. This dynamic parameter adjustment allows the lens to maintain optimal optical precision for the current viewing direction while adapting to natural eye movements, eliminating the need for wearers to relearn.
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to spectacles (200) comprising (i) a spectacle lens (100) with - a carrier lens (102) having a carrier lens front surface and a carrier lens rear surface (108) and - a front surface lens segment arranged on the carrier lens front surface and/or with a rear surface lens segment (104) arranged on the carrier lens rear surface (108), wherein - the front surface lens segment is slidably guided on the carrier lens front surface and/or that the rear surface lens segment (104) is slidably guided on the carrier lens rear surface (108), (ii) a front surface lens segment drive for displacing the front surface lens segment on the carrier lens front surface and/or a rear surface lens segment drive (208a, 208b, 208c, 208d, 210a, 210b, 210c, 210d) for displacing the to move the posterior surface lens segment (104) on the carrier lens posterior surface (108), (iii) an eye position detection device (212a,212b) for detecting the position of an eye of a wearer of spectacles (200) and (iv) a drive control device for controlling the front surface lens segment drive and/or the rear surface lens segment drive (208a, 208b, 208c, 208d, 210a, 210b, 210c, 210d) depending on the position of the eye detected by the eye position detection device (212a, 212b), characterized in that the front surface lens segment and/or the rear surface lens segment (104) has a power distribution corresponding to a near segment, a distance segment and a progression channel of a conventional progressive lens.