Optical Imaging Lens with Variable Gaps for Auto Focus
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge is to design a miniaturized optical lens for consumer electronics that maintains high imaging quality while reducing size and system length, particularly during auto focus operations, without compromising clarity for both distant and close objects.
Innovation Solution
The optical imaging lens is designed with a plurality of lens elements arranged along an optical axis, featuring variable gaps and refracting power distribution, ensuring ΔG/Gv≦0.1, which allows for reduced length extension during auto focus without sacrificing imaging quality, and is easier to manufacture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a voice coil motor (VCM) is equipped for adjusting the location of an image plane to achieve auto focus, then the imaging quality is improved, but the system length increases
Solution Approach 1:
The patent removes the voice coil motor (VCM) from the optical imaging lens system, extracting the problematic component that caused system length increase. Instead of using VCM for auto focus, the patent employs a different mechanism that does not require additional motor components, thereby reducing the overall system length while maintaining imaging quality through alternative optical design means.
Solution Approach 2:
The patent implements dynamic focusing capability through alternative means rather than static VCM positioning. By using a different auto focus mechanism that does not rely on VCM, the system achieves dynamic adjustment of image plane location without the length penalty, allowing the lens to adapt its focal position while maintaining a compact form factor.
2Volume of moving object
If the optical lens is miniaturized to meet consumer electronics requirements, then the device size is reduced, but the imaging quality and performance are compromised
Solution Approach 1:
The patent employs parameter changes in the optical design to achieve miniaturization without quality loss. By optimizing parameters such as the curvature radii, thicknesses, and refractive indices of lens elements, the patent creates a compact lens system that maintains favorable imaging quality. The specific parameter relationships (e.g., focal length, F-number, field of view) are carefully controlled to ensure performance despite reduced size.
Solution Approach 2:
The patent divides the optical system into multiple lens elements with specific refracting power distributions. By segmenting the optical function across several elements rather than relying on a single large element, the patent achieves miniaturization while maintaining imaging quality. Each lens element contributes to the overall optical performance, allowing compact design without sacrificing clarity or resolution.
3Length of moving object
If the lens elements are designed with variable gaps and refracting power distribution, then the system length during auto focus is reduced, but the design complexity increases
Solution Approach 1:
The patent uses systematic parameter changes in the lens element design, including variable gaps and refracting power distributions, to reduce system length. These parameter variations are carefully controlled within specific ranges to achieve compact auto focus performance. The parameter relationships are optimized to work together harmoniously, reducing design complexity despite the multiple variables involved.
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 achieves favorable imaging quality and reduced system length, enhancing the lens's ability to capture clear images of both distant and close objects while facilitating a slim product design and improved telescopic capabilities.
Implementation Method 1
Each of the lens elements includes an object-side surface and an image-side surface, the object-side surface faces the object side and allows an imaging ray to pass through, and the image-side surface faces the image side and allows the imaging ray to pass through
Data Source
AI summary
An optical imaging lens includes a plurality of lens elements arranged in order from an object side to an image side along an optical axis, and each lens element has an object-side surface and an image-side surface. There is at least one variable gap between the lens elements, and one of the lens elements closest to the object side has positive refracting power. The optical imaging lens satisfies: ΔG/Gv≦0.1. Here, ΔG is an absolute value of a difference between a first value and a second value of the length of the at least one variable gap along the optical axis when an object having an infinite object distance and an object having an object distance of 500 millimeters are focused respectively, and Gv is the second value.