Optical Imaging Lens Assembly Spacer Design Yield
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Solution Overview
Problem
The optical imaging lens assembly in existing technologies faces challenges with low yield due to issues such as poor tightness of connection between lenses and lens barrels, instability during assembly, and deformation of thin spacers, leading to reduced product quality and increased manufacturing costs.
Innovation Solution
The optical imaging lens assembly incorporates a design with a fifth lens having the largest outer diameter, a thicker fourth spacer, and carefully controlled curvature radii to ensure stable assembly and connection, preventing deformation and improving yield by providing a larger operation space for glue dispensing and enhancing the support structure between lenses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the camera size is reduced to meet stringent size requirements, then the compactness of the optical imaging lens assembly is improved, but the space for glue dispensing operation becomes narrow, causing poor tightness of connection between the lens and lens barrel
Solution Approach 1:
The patent applies local quality by designing the fifth lens with the largest outer diameter specifically at the rear end of the optical imaging lens assembly. This local enlargement creates sufficient space for glue dispensing operation at the rear end, ensuring proper tightness of connection between the lens and lens barrel, while the overall compact design is maintained through the small-camera configuration.
2Volume of moving object
If the rear spacer is made thin to reduce overall size, then the compactness is improved, but the support force to the front lens becomes insufficient, causing the lens to tilt and fall during reliability tests
Solution Approach 1:
The patent applies local quality by strategically positioning the thicker fourth spacer at the rear end of the assembly to provide concentrated support force to the front lens system. This local reinforcement ensures lens stability during reliability tests while maintaining overall compact dimensions through the thin rear spacer design.
Solution Approach 2:
The patent uses composite material approach by combining spacers of different thicknesses (thinner third spacer and thicker fourth spacer) within the same optical assembly. This composite structure allows the rear spacer to remain thin for compactness while the fourth spacer provides sufficient support force, resolving the contradiction between size and reliability.
3Ease of manufacture
If an irrational lens shape is used to simplify manufacturing, then the ease of manufacture is improved, but weld lines or shrinkage occur on the lens surface, affecting the stability of fit between the lens and spacer
Solution Approach 1:
The patent applies parameter changes by optimizing the curvature radii of lens surfaces within specific numerical ranges. This ensures rational lens shapes that avoid weld lines and shrinkage during manufacturing, while maintaining stable fit between lenses and spacers. The curvature radius parameters are carefully selected to balance ease of manufacture with manufacturing precision.
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 design significantly improves the yield of the optical imaging lens assembly by ensuring stable assembly, preventing deformation, and maintaining imaging quality, while reducing manufacturing defects and costs.
Implementation Method 1
a fifth lens, wherein the fifth lens has the largest outer diameter in all of lenses of the optical imaging lens assembly
Implementation Method 2
the fourth spacer is located on an image side of the fourth lens and abuts against an image-side surface of the fourth lens, and the fourth spacer is thicker than remaining spacers of the plurality of spacers
Implementation Method 3
the optical imaging lens assembly includes a lens barrel, wherein the lens barrel is internally provided with a first lens; a second lens; a third lens; a fourth lens, wherein the fourth lens has a positive refractive power
Data Source
AI summary
The disclosure provides an optical imaging lens assembly. The optical imaging lens assembly includes a lens barrel, wherein the lens barrel is internally provided with a first lens; a second lens; a third lens; a fourth lens, wherein the fourth lens has a positive refractive power; a fifth lens, wherein the fifth lens has the largest outer diameter in all of lenses of the optical imaging lens assembly; and a plurality of spacers, wherein the plurality of spacers at least include a fourth spacer, the fourth spacer is located on an image side of the fourth lens and abuts against an image-side surface of the fourth lens, and the fourth spacer is thicker than remaining spacers; wherein f and FOV and CP4 satisfy 0<f*tan(Semi-FOV)/CP4<10; R8 and R9 and CP4 satisfy 0<(R8+R9)/CP4<15. The disclosure solves the problem of a low yield of the optical imaging lens assembly.