Six-Lens Camera Assembly for Ultra-Wide Angle
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Solution Overview
Problem
Ultra-wide-angle lens assemblies are limited by large size and low pixel and low relative illumination, making them unsuitable for miniaturized portable electronic devices and resulting in non-uniform images.
Innovation Solution
A camera lens assembly comprising six lenses with specific refractive powers, surface shapes, and thickness configurations, including negative and positive refractive powers, concave and convex surfaces, and strategically placed stops, to achieve a compact, high-brightness, and high-image-quality design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If ultra-wide-angle lens assembly is designed to achieve wide field of view, then the field of view is improved, but the size of lens assembly becomes large
Solution Approach 1:
The lens assembly is divided into six individual lenses with specific refractive powers arranged sequentially along the optical axis. Each lens element is optimized independently to contribute to the overall ultra-wide-angle capability while maintaining a compact form factor, resolving the contradiction between wide field of view and compact size.
Solution Approach 2:
The patent employs specific refractive power values for each lens element (first lens: -1<f1<0, second lens: -1<f2<0, third lens: 0<f3<1, fourth lens: 0<f4<1, fifth lens: 0<f5<1, sixth lens: 0<f6<1) to optimize the optical path and achieve ultra-wide-angle coverage within a compact structure, changing the optical parameters to resolve the size-performance contradiction.
2Ease of manufacture
If conventional lens assembly structure is used, then manufacturing is simpler, but image quality is low and non-uniform
Solution Approach 1:
Different regions of the lens assembly are assigned different refractive powers and surface curvatures tailored to their specific optical functions. The first and second lenses have negative refractive power for field curvature correction, while the third, fourth, and fifth lenses have positive refractive power for focusing and illumination uniformity, achieving high image quality through localized optical optimization.
Solution Approach 2:
The patent utilizes curved surfaces with specific radius of curvature values for each lens element to correct optical aberrations and improve image uniformity. The concave and convex surfaces are strategically designed to control light paths and eliminate non-uniform illumination, enhancing image quality while maintaining manufacturability.
3Volume of moving object
If lens assembly size is reduced for portable devices, then adaptability to portable devices is improved, but pixel density and relative illumination become low
Solution Approach 1:
The six-lens assembly is designed to perform multiple optical functions simultaneously: wide-angle coverage, focus control, illumination uniformity, and aberration correction. This multi-functionality allows the compact lens assembly to deliver high pixel density and relative illumination performance suitable for portable electronic devices without sacrificing optical quality.
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
The configuration enables a smaller size, improved image quality, and ultra-wide-angle capabilities, suitable for portable devices and applications like vehicles and virtual reality.
Implementation Method 1
a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, sequentially from an object side to an image side along an optical axis
Data Source
AI summary
The present disclosure discloses a camera lens assembly including a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens has negative refractive power, and an image-side surface thereof is concave; the second lens has negative refractive power, an object-side surface thereof is convex, and an image-side surface thereof is concave; the third lens has positive refractive power, and an image-side surface thereof is convex; the fourth lens has refractive power; the fifth lens has refractive power; and the sixth lens has positive refractive power. An effective focal length f1 of the first lens and an effective focal length f3 of the third lens satisfy −1<f1/f3<−0.5; and an effective focal length f2 of the second lens and the effective focal length f3 of the third lens satisfy −8<f2/f3<−3.