Six-Element Optical Imaging Lens Compact Design
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Solution Overview
Problem
The challenge lies in designing optical imaging lenses with reduced dimensions while maintaining good optical performance, particularly for consumer electronic devices like cell phones and digital cameras, where the distance from the object side surface of the first lens element to the image plane is too large, necessitating innovative design approaches beyond mere scaling.
Innovation Solution
The optical imaging lens design involves controlling the convex or concave shape of each lens element's surfaces and specific parameters, such as refracting power and thickness, to shorten the lens length while maintaining optical characteristics, using a configuration of six lens elements and a filtering unit with aspherical surfaces and carefully managed air gaps to satisfy specific equations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the optical imaging lens is scaled down to reduce dimensions, then the size of the lens is reduced, but the optical performance deteriorates
Solution Approach 1:
The patent applies parameter changes by precisely controlling the convex or concave shape of each lens element surface and optimizing specific parameters (TTL≤6.5mm, TL/(G23+G34+G45)≤2.7) to achieve both compact size and good optical performance, resolving the contradiction between scaling down and maintaining performance
Solution Approach 2:
The patent utilizes aspherical surfaces for the fifth and sixth lens elements to correct optical aberrations that occur when scaling down the lens system, allowing the lens to maintain good optical characteristics while achieving reduced dimensions
2Length of moving object
If the distance from the first lens element to the image plane is reduced, then the device becomes more compact, but the optical characteristics deteriorate
Solution Approach 1:
The patent controls the distance parameter TTL to be ≤6.5mm while maintaining good optical characteristics through optimized lens element configurations, directly resolving the contradiction between compactness and optical quality
Solution Approach 2:
The patent divides the optical system into six distinct lens elements with specific configurations, allowing each element to contribute to both the reduced overall length and the maintenance of optical characteristics
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 approach effectively shortens the optical imaging lens length, enhances aperture, narrows the field of view, and increases assembly yield while maintaining good optical performance, making it suitable for compact electronic devices.
Implementation Method 1
Each of the first, second, third, fourth, fifth and sixth lens elements have varying refracting power
Data Source
AI summary
Present embodiments provide for an optical imaging lens. The optical imaging lens includes a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element positioned in an order from an object side to an image side. Through controlling the convex or concave shape of the surfaces of the lens elements and designing parameters satisfying at least two inequalities, the optical imaging lens shows better optical characteristics, increases the effective focal length, and narrows the angle of view while the total length of the optical imaging lens is shortened.