Imaging Lens Assembly Mounting with Light Curable Adhesive
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Solution Overview
Problem
Conventional light scanning units face challenges in productivity due to the complexity of applying high and low elasticity adhesives for imaging lenses, and thermal expansion differences between materials lead to shear stress and reduced adhering strength, causing the imaging lens to separate from the mount.
Innovation Solution
An imaging lens assembly with a holder coupled to the mount using a light curable adhesive, where the holder has a thermal expansion coefficient matching the mount, and a radiated portion to efficiently cure the adhesive, minimizing thermal deformation effects and improving assembly efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high elasticity adhesive and low elasticity adhesive are applied separately to support the imaging lens, then the imaging lens can be firmly supported with precise position adjustment, but the manufacturing process becomes complex and productivity decreases
Solution Approach 1:
The patent combines the functions of high elasticity adhesive (for precise positioning) and low elasticity adhesive (for thermal stress resistance) into a single light curable adhesive formulation. This unified adhesive simultaneously provides both positioning precision and thermal stability, eliminating the need for separate application processes and thereby improving productivity while maintaining reliable support.
Solution Approach 2:
The patent modifies the chemical and physical parameters of the adhesive by using a light curable adhesive with specific properties: it maintains elasticity to accommodate thermal expansion differences, cures upon light exposure for rapid bonding, and provides sufficient adhesion strength. This parameter optimization allows a single adhesive to perform multiple functions previously requiring two different adhesives.
2Reliability
If low elasticity adhesive is applied through a narrow gap between imaging lens and mount, then thermal stress can be reduced, but the application process becomes difficult due to the narrow gap smaller than 0.5 mm
Solution Approach 1:
The patent changes the rheological parameters of the adhesive by formulating a light curable adhesive with appropriate viscosity and flow characteristics that enable it to be applied through narrow gaps smaller than 0.5 mm. The adhesive can flow into the narrow space between the imaging lens and mount, then cures upon light exposure to provide thermal stress resistance without requiring complex application equipment or techniques.
3Productivity
If light curable adhesive is used to bond imaging lens and mount, then curing can be achieved quickly with light exposure, but the adhesive has stronger adhesion to the mount than to the imaging lens, causing lens separation under thermal stress
Solution Approach 1:
The patent optimizes the chemical composition parameters of the light curable adhesive to achieve balanced adhesion to both the imaging lens and the mount. By adjusting the adhesive formula, the patent ensures that the adhesive maintains sufficient bonding strength to both surfaces even under thermal stress, preventing lens separation while retaining the advantage of rapid light-induced curing.
4Adaptability or versatility
If imaging lens and mount made of different materials are bonded, then design flexibility is improved, but thermal expansion coefficient differences generate shear stress that reduces adhering strength
Solution Approach 1:
The patent selects and formulates a light curable adhesive with specific elastic modulus and thermal expansion characteristics that can accommodate the thermal expansion coefficient differences between the imaging lens and the mount. The adhesive acts as a compliant intermediate layer that absorbs thermal stress through its elastic properties, preventing shear stress from compromising the bond while allowing design flexibility to be maintained.
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 stabilizes the imaging lens by reducing shear stress and enhancing adhering strength, improving productivity and reliability by allowing precise adjustment and efficient curing of the adhesive, while maintaining stability despite thermal changes.
Implementation Method 1
a light curable adhesive is applied between the imaging lens and the mount, and then, a curing beam such as an ultraviolet ray, etc., is scanned to the applied area to cure the light curable adhesive
Implementation Method 2
since the imaging lens and the mount formed of different materials have different thermal expansion coefficients, a shear stress between the imaging lens and the mount is generated due to a thermal deformation difference
Data Source
AI summary
An imaging lens assembly includes a mount which comprises a mount adhering portion on which a light curable adhesive is applied, an imaging lens which comprises a lens portion, and a supporting portion to extend from the lens portion, and a holder coupled to the mount adhering portion by the light curable adhesive, and to support the supporting portion.