Multi-element Optical Imaging Lens Compact Design
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Solution Overview
Problem
Optical imaging lenses face challenges in achieving a balance between being thin, short, and providing good image quality while also having a large field of view, as increasing the number of lenses can make devices thicker and less portable.
Innovation Solution
The design of an optical imaging lens with at least eight lens elements, where the convex or concave shape of the surfaces is controlled to shorten the lens length and expand the field of view, maintaining good optical characteristics by adjusting air gaps, thicknesses, and refractive indices of the lens elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of optical lenses is increased to improve image quality, then imaging quality is improved, but the distance from the object-side surface of the first lens to the image plane increases, making the lens thicker
Solution Approach 1:
The patent applies parameter changes by precisely controlling the convex or concave shape of lens surfaces, adjusting air gaps between lenses, optimizing thickness of each lens element, and selecting specific refractive indices to achieve compact lens length while maintaining high imaging quality with eight or nine lens elements
Solution Approach 2:
The patent segments the optical system into multiple lens elements (eight or nine lenses) with alternating positive and negative refractive powers, where each lens element is optimized for specific functions such as correcting spherical aberration, chromatic aberration, and distortion, allowing complex optical corrections in a compact configuration
2Reliability
If the number of optical lenses is increased to improve image quality, then imaging quality is improved, but the field of view cannot be enlarged
Solution Approach 1:
The patent uses parameter changes by optimizing the convex or concave shape of lens surfaces and adjusting the refractive powers of individual lens elements to simultaneously achieve a large field of view (greater than 60 degrees) while maintaining excellent imaging quality through correction of various optical aberrations
Solution Approach 2:
The patent segments the optical system into multiple specialized lens elements with alternating positive and negative refractive powers, where specific lenses are designed to correct different types of aberrations (spherical, chromatic, distortion) while collectively enabling a wide field of view
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 allows for a shortened lens length and an enlarged field of view while maintaining excellent optical performance, correcting spherical aberrations and reducing distortion, thus enhancing the imaging quality and portability of devices like smartphones and cameras.
Implementation Method 1
The first lens element to the eighth lens element may each comprise an object-side surface facing toward the object side and allowing imaging rays to pass through and an image-side surface facing toward the image side and allowing the imaging rays to pass through
Data Source
AI summary
An optical imaging lens may include a first, a second, a third, a fourth, a fifth, a sixth, a seventh, and an eighth lens elements positioned in an order from an object side to an image side. Through designing concave and/or convex surfaces of each lens elements, the optical imaging lens may provide improved imaging quality and optical characteristics, reduced length of the optical imaging lens and increased field of view while the optical imaging lens may satisfy one of the third, fourth, fifth and sixth lens element is the lens element with the maximum thickness along the optical axis.