Cut-Edge Optical Module With Axial Diopter Adjustment
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Solution Overview
Problem
Existing VR devices with full circular lens barrels interfere with the user's brow eyebrow bone or nose due to increased diameter, necessitating edge cutting, which prevents diopter adjustment by rotation, failing to accommodate varying user vision needs.
Innovation Solution
An optical module with a cut-edge lens design featuring a guide slot on the lens barrel and an inclined slot on the focusing ring, allowing linear movement of the lens along the axial direction for diopter adjustment, enhancing wearing comfort and visual acuity adjustment without glasses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lens outer diameter is increased to improve optical performance, then the optical quality is improved, but the lens barrel outer diameter increases causing interference with the user's brow eyebrow bone or nose
Solution Approach 1:
The patent changes the traditional full circular lens barrel structure to a cut-edge lens structure. The lens barrel includes a lens mounting hole with a cut-edge configuration that removes material from one side of the circular structure, creating an asymmetric shape. This asymmetric design reduces the overall width of the lens barrel, preventing interference with the user's brow eyebrow bone or nose while maintaining the optical performance through proper lens positioning and focal length optimization.
2Object-affected harmful factors
If edge cutting is performed on the lens to avoid interference with facial features, then wearing comfort is improved, but the ability to perform diopter adjustment by rotation is lost
Solution Approach 1:
The patent transitions from a two-dimensional rotational adjustment mechanism to a three-dimensional linear adjustment mechanism. Instead of rotating the lens barrel circumferentially to achieve diopter adjustment, the invention introduces a linear movement dimension where the lens or lens holder can move axially along the optical axis. This linear translation within the cut-edge lens barrel structure enables diopter adjustment while preserving the asymmetric cut-edge configuration that provides wearing comfort.
3Object-affected harmful factors
If the lens barrel is designed with a cut-edge structure, then wearing comfort is improved by avoiding interference with facial features, but the structural complexity increases
Solution Approach 1:
The patent segments the lens barrel structure into distinct functional components: a lens holder that can move linearly within the lens barrel, a lens mounted on the lens holder, and the lens barrel itself with the cut-edge configuration. This segmentation allows the cut-edge structural modification to be isolated to specific portions of the assembly while maintaining simpler structures in other areas. The modular approach enables the complex cut-edge design to be integrated without proportionally increasing overall device complexity.
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
Enables clear image viewing without glasses by accommodating different visual acuities through linear lens movement, improving user experience and comfort by avoiding interference with facial features.
Implementation Method 1
an inclined slot is provided on a wall of the focusing ring close to the lens barrel, and the transmission member passes through the guide slot and is slidably connected to the inclined slot; during focusing, the focusing ring is slid in a circumferential direction of the lens barrel, the inclined slot drives the transmission member to slide within the guide slot, so that the first lens is capable of moving translationally along the axial direction of the lens barrel
Data Source
AI summary
The disclosure provides an optical module and a wearable device. The optical module includes a lens group comprising at least a first lens consisting of a cut-edge lens; a lens barrel with an inner cavity, wherein the first lens is movably provided within the inner cavity; a guide slot, provided on a side wall of the lens barrel along an axial direction; a transmission member, through which a periphery of the first lens is slidably matched with the guide slot; a focusing ring, slidably provided on an outer side of the lens barrel; and an inclined slot, provided on a wall of the focusing ring close to the lens barrel, and the transmission member passes through the guide slot and is slidably connected to the inclined slot.