Lens Barrel Light-Passing Hole Fixing for Wide-Angle Lens Stability
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Solution Overview
Problem
Conventional lens modules, particularly those with ultra-wide-angle or wide-angle lenses, suffer from deformation of the optical effective region due to the large ratio of outer diameter to thickness, leading to assembly issues and reduced imaging quality.
Innovation Solution
The lens module design incorporates a first protrusion on the first optical lens disposed in a light-passing hole within the lens barrel, allowing the outer edge of the lens to be fixed without direct contact with the barrel, thereby preventing deformation and improving assembly precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the first optical lens is closely fitted with the inner side wall of the lens barrel to fix the lens, then the assembly process is simplified, but the optical effective region deforms due to the large outer diameter to thickness ratio
Solution Approach 1:
The patent divides the lens fixing function into two independent parts: the first protrusion (on the optical lens) fits into the light-passing hole (in the lens barrel) for precise positioning, while the pressing ring provides additional securing force. This segmentation allows the optical effective region to remain undeformed while achieving reliable fixation.
Solution Approach 2:
The light-passing hole acts as an intermediary structure between the first optical lens and the lens barrel. By having the first protrusion dispose in this light-passing hole, the patent creates an intermediate fixation mechanism that prevents direct contact between the outer edge surface of the lens and the inner side wall of the barrel, thus avoiding deformation while maintaining assembly simplicity.
2Adaptability or versatility
If the outer diameter of the first optical lens is increased to achieve ultra-wide-angle or wide-angle functionality, then the imaging coverage is improved, but the optical effective region becomes more prone to deformation
Solution Approach 1:
The patent introduces a new dimensional approach to fixing the lens by utilizing the light-passing hole cavity space. Instead of relying solely on radial contact between the lens outer edge and barrel wall, the first protrusion extends into the light-passing hole, creating a three-dimensional fixation geometry that stabilizes the optical effective region while accommodating large outer diameter lenses for wide-angle imaging.
Data Source
AI summary
A lens module includes a lens barrel and a first optical lens. The lens barrel includes a first lens chamber and a second lens chamber arranged along an optical axis, wherein an inner edge surface of the lens barrel has an extension portion, the extension portion is located between the first lens chamber and the second lens chamber and defines a light-passing hole, and the first lens chamber communicates with the second lens chamber via the light-passing hole. The first optical lens is disposed in the first lens chamber and has a first optical zone surrounding the optical axis and a first non-optical zone surrounding an outside of the first optical zone, wherein the first non-optical zone includes a first protrusion, and the first protrusion is disposed in the light-passing hole.