Lens Assembly UV Curing Shield
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Solution Overview
Problem
The miniaturization of camera modules with increased lens counts leads to deformation of the lens barrel due to heat generated by ultraviolet light during the UV curing process, causing distortion of the optical axis and deterioration of lens performance.
Innovation Solution
A ring member is fitted to the outer circumferential surface of the lens barrel, biased towards the subject side, to block ultraviolet rays and prevent heat transmission, while being fixed to the lens barrel using an ultraviolet curing bond, heat fusion, or thermosetting bond, ensuring the lens barrel is not directly exposed to UV irradiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If UV curing bond is used to fix the lens holder to the lens barrel, then bonding strength is improved, but lens barrel deformation occurs due to heat from ultraviolet light
Solution Approach 1:
The patent introduces a ring member as an intermediary component between the light source and the lens barrel. This ring member blocks ultraviolet light from directly irradiating the lens barrel, thereby preventing heat-induced deformation while allowing the UV curing bond to maintain its bonding function. The ring member acts as a mediator that protects the lens barrel from the harmful thermal effects of UV light.
Solution Approach 2:
The patent divides the lens assembly into distinct functional zones by introducing the ring member. The space is segmented such that the lens holder and lens barrel are positioned in a region shielded from direct UV irradiation, while the bonding process can still occur effectively. This spatial segmentation allows the curing bond to function without causing lens barrel deformation.
2Strength
If UV curing bond is used to fix the ring member to the lens barrel, then bonding strength is improved, but heat from UV light causes lens barrel deformation
Solution Approach 1:
The ring member serves as a protective intermediary that blocks UV light from reaching the lens barrel during the bonding process. This ensures that the UV curing bond can be applied to fix the ring member to the lens barrel without causing heat-induced deformation or misalignment of the optical axis. The ring member protects the optical components from thermal damage while allowing effective bonding.
Solution Approach 2:
The ring member is positioned in advance to prevent UV light from irradiating the lens barrel before the bonding process completes. This preliminary protective action ensures that the lens barrel remains undeformed and the optical axis alignment is maintained throughout the bonding process, preventing any potential misalignment issues.
3Ease of manufacture
If the lens barrel is directly exposed to UV irradiation, then UV curing bond can be applied effectively, but lens barrel deformation occurs
Solution Approach 1:
The ring member acts as a protective intermediary that allows the UV curing bond to be applied effectively to bond the ring member to the lens barrel, while simultaneously preventing UV light from directly irradiating and deforming the lens barrel. This mediator enables the bonding process to proceed with high effectiveness while maintaining manufacturing precision.
Solution Approach 2:
The patent applies local protection by positioning the ring member specifically at the area where UV light would otherwise directly hit the lens barrel. This localized quality control ensures that the bonding process can proceed effectively at the ring member location while the lens barrel remains protected from UV-induced deformation, maintaining its dimensional accuracy.
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 configuration significantly reduces deformation of the lens barrel and maintains the alignment of optical axes, preventing misalignment of lenses and enhancing the overall performance of the camera module.
Implementation Method 1
The lens holder and the lens barrel may be fixed by an ultraviolet (UV) curing bond
Implementation Method 2
A ring member is fitted to the outer circumferential surface of the lens barrel, biased towards the subject side, to block ultraviolet rays and prevent heat transmission
Data Source
AI summary
A lens assembly includes a lens barrel having an outer diameter increasing from a subject side to an image side, and a ring member disposed on an outer circumferential surface of the lens barrel.