Lens Aligning Device Using Decentering Formula
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Solution Overview
Problem
Existing lens aligning devices face challenges in efficiently aligning image capturing lenses due to complex algorithms and hardware structures, leading to low versatility and increased production time, especially in manufacturing lenses for portable devices and wafer-level lens processes, where decentering issues are not adequately addressed.
Innovation Solution
A lens aligning device that measures decentering amounts between lens surfaces and calculates target inter-lens decentering values using specific formulas to optimize alignment, allowing for separate adjustment of lenses without requiring detailed shape and thickness information, thereby simplifying the alignment process and improving versatility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional lens aligning devices use complex algorithms and hardware structures to measure and correct decentering, then measurement precision and manufacturing precision are improved, but device complexity and production time increase
Solution Approach 1:
The patent divides the lens alignment process into two independent stages: (1) measuring decentering amounts of individual lenses relative to their own optical axes, and (2) calculating and applying inter-lens decentering corrections. This segmentation allows each stage to be handled with simpler, dedicated measurement and correction mechanisms, reducing overall device complexity while maintaining alignment precision.
Solution Approach 2:
The patent extracts the measurement of individual lens decentering from the overall alignment process. By separately measuring each lens's decentering relative to its own optical axis and then calculating the inter-lens decentering based on these measurements, the system avoids the need for complex direct inter-lens alignment measurements, simplifying the hardware structure.
2Manufacturing precision
If detailed shape and thickness information of lenses is used in alignment calculations, then manufacturing precision is improved, but ease of manufacture and productivity are worsened
Solution Approach 1:
The patent extracts only the essential decentering amount measurements from the lens parameters needed for alignment. By measuring only the decentering amounts of individual lenses relative to their optical axes and using these extracted values to calculate inter-lens decentering, the system avoids the need to input and process detailed shape and thickness information, simplifying the alignment process while maintaining accuracy.
Solution Approach 2:
The patent changes the alignment approach from using detailed geometric parameters (shape, thickness) to using simplified decentering amount parameters. This parameter transformation allows the alignment calculation to be performed with minimal input data, improving ease of manufacture and productivity without sacrificing alignment precision.
3Adaptability or versatility
If conventional alignment methods are used for wafer-level lenses, then existing lens types can be aligned, but adaptability to wafer-level lens processes and versatility across different portable device models are reduced
Solution Approach 1:
The patent creates a universal alignment method that works for both conventional individual lenses and wafer-level lenses. By measuring decentering relative to each lens's own optical axis and then calculating inter-lens decentering based on these measurements, the system can handle different lens types and configurations (single lens, multiple lenses, wafer-level arrays) with the same basic procedure, enhancing versatility while maintaining precision.
Solution Approach 2:
The patent adapts the alignment parameters to suit wafer-level lens processes by measuring decentering amounts for each lens element within the wafer array relative to its local optical axis. This parameter approach allows the same measurement and calculation methodology to be applied across different lens configurations and portable device models, improving adaptability without compromising correction precision.
Data Source
AI summary
A lens aligning device includes: a decentering detection mechanism for measuring a first lens decentering amount; a aligning position calculation control mechanism for calculating a target inter-lens decentering amount by using Formula (1); an adjustment mechanism for moving at least one of a first lens and a second lens so that the inter-lens decentering amount matches the target inter-lens decentering amount.Inter-lens decentering amount=First lens decentering amount×−2 (1)