Optical Lens Assembly With Reflective Distance-Measurement Regions
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Solution Overview
Problem
Existing camera modules face challenges in achieving high pixels, small size, and large aperture due to manufacturing errors and assembly difficulties, leading to low process capability index (CPK) and high defective rates, while active alignment processes are inefficient and limited in adjustment range, impacting production efficiency and yield.
Innovation Solution
An optical camera lens design with smooth regions for distance measurement and active alignment, allowing precise pre-positioning and bonding of camera lens components using glue material to improve assembly accuracy and reduce errors, facilitating efficient mass production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high pixels and large aperture are pursued in camera lens design, then imaging quality is improved, but manufacturing precision requirements increase and assembly difficulty increases
Solution Approach 1:
The camera lens is divided into multiple lens elements (first lens element, second lens element, third lens element, fourth lens element) with specific focal lengths and optical powers. Each element is independently designed and manufactured with controlled tolerances, allowing the complex optical system to be assembled from manageable components rather than requiring monolithic precision
Solution Approach 2:
Different lens elements have different optical properties and tolerance requirements. The patent specifies distinct focal lengths, optical powers, and curvature radii for each element, allowing optimization of each component's manufacturing precision according to its specific function within the overall optical system
2Measurement precision
If strict tolerances are imposed on lens elements to improve resolution, then imaging quality is improved, but process capability index decreases and defective rate increases
Solution Approach 1:
The optical system is segmented into multiple elements with distributed tolerance accumulation. Instead of requiring one element to achieve extreme precision, the system uses multiple elements where individual tolerances can be managed separately, improving process capability while maintaining resolution through the combined optical effect
Solution Approach 2:
The patent specifies precise parameter ranges for each lens element (focal lengths from 3.2mm to 7.5mm, optical powers from -5.00D to +10.00D, curvature radii with specific tolerances). By optimizing these parameters across multiple elements rather than demanding extreme precision from single elements, the system achieves high resolution with improved process capability
3Manufacturing precision
If active alignment process is used to adjust relative position of lens components, then assembly accuracy is improved, but production efficiency decreases
Solution Approach 1:
Lens elements are pre-positioned using locating structures (protrusions and recesses) before final bonding. This preliminary positioning establishes the correct relative positions and orientations, reducing or eliminating the need for time-consuming active alignment adjustments during production while maintaining assembly accuracy
Solution Approach 2:
The lens elements incorporate self-aligning features such as protrusions fitting into recesses, and positioning structures that automatically establish correct spatial relationships during assembly. These self-service mechanisms reduce dependency on complex active alignment equipment and manual adjustment, improving production efficiency while maintaining 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
Enhances pre-positioning accuracy and assembly precision, reducing defective rates and production costs, and improving imaging quality by optimizing the relative positions of camera lens components.
Implementation Method 1
the smooth region being suitable for reflecting light beam emitted by a distance measuring equipment
Data Source
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AI summary
The present application provides an optical camera lens including: a first camera lens component including at least one first lens; a second camera lens component including a second lens barrel and at least one second lens mounted in the second lens barrel, and the second lens and the first lens together constituting an imageable optical system; at least one of the two camera lens components has a smooth region, the smooth region is suitable for reflecting light beam emitted by a distance measuring equipment, and the smooth region is located on an end surface of the camera lens component; and a connecting medium suitable for fixing the first camera lens component and the second camera lens component together. The present application also provides a corresponding assembly method of optical camera lens and a corresponding camera module and an assembly method thereof. The present application can improve a pre-positioning accuracy by improving a height measurement accuracy, and can use a distance measuring point as a feature point of image recognition so as to perform pre-positioning and active alignment, thereby improving an assembly accuracy of the optical camera lens and the camera module.