Ten-Lens Wide-Angle Assembly for Compact Low-Distortion Imaging
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Solution Overview
Problem
Conventional optical lens assemblies struggle to simultaneously achieve high resolution, high brightness, large field-of-view, large aperture, and miniaturization, often resulting in undesired distortions and large size.
Innovation Solution
A wide-angle lens assembly comprising ten lenses with specific refractive powers and configurations, including convex-concave, concave-convex, and cemented lenses, optimized for focal lengths, apertures, and distances to achieve a large aperture (FNO≤1.8), field-of-view (FOV≥160°), and high resolution (35 million pixels), while minimizing distortions and size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional optical lens assembly designs are used, then the structure is simple and easy to manufacture, but the field-of-view is small and distortion is high
Solution Approach 1:
The lens assembly is divided into ten individual lens elements with alternating positive and negative refractive powers, arranged in specific groups. This segmentation allows each lens to contribute to expanding the field-of-view while correcting distortion, achieving FOV≥160° with controlled distortion through the coordinated action of multiple specialized elements rather than a single complex lens.
Solution Approach 2:
The patent employs composite lens structures including cemented lens groups (e.g., the seventh and eighth lenses with positive-negative opposite refractive powers) and combinations of different glass materials with varying refractive indices and Abbe numbers. This composite approach enables simultaneous achievement of wide field-of-view, high resolution, and distortion control that cannot be obtained with single-material lenses.
2Manufacturing precision
If more lens elements are added to increase field-of-view and resolution, then imaging quality improves, but the overall size increases
Solution Approach 1:
The lens assembly adopts a compact nested arrangement where multiple lens elements are closely spaced and some are cemented together (such as the seventh and eighth lenses). This nesting reduces the overall axial length while maintaining the necessary optical path for wide-angle imaging, achieving TTL control with ten lens elements through efficient spatial utilization.
Solution Approach 2:
The patent utilizes non-paraxial ray tracing and aspheric surface designs to correct off-axis aberrations in three-dimensional space, enabling wide field-of-view coverage without proportionally increasing the axial length. The aspheric surfaces allow light rays from wide angles to be focused correctly, maintaining compact form factor while achieving FOV≥160°.
3Illumination intensity
If aperture is increased to acquire more luminous flux, then brightness improves, but lens size and complexity increase
Solution Approach 1:
The patent optimizes the aperture diameter and F-number parameters of each lens element to achieve high brightness (FNO≤1.8) while controlling the physical size. By carefully selecting the aperture diameter D1 of the first lens relative to its effective focal length F1 (satisfying -2.51<F1/D1<0.51), the system achieves high luminous flux collection without requiring excessively large lens diameters that would increase complexity and size.
4Area of stationary object
If focal length is reduced to achieve wide field-of-view, then field-of-view increases, but resolution and imaging quality deteriorate
Solution Approach 1:
Different regions of the lens assembly are designed with specialized functions: the first five lenses form a negative-power dominant group for wide-angle light collection, while the last five lenses form a positive-power dominant group for image formation and aberration correction. This local specialization allows the system to achieve both wide field-of-view and high resolution (35 million pixels) by optimizing each region's contribution to the overall imaging performance.
Solution Approach 2:
The patent uses composite lens groups with alternating positive and negative refractive powers, including cemented doublets and triplets with carefully selected glass materials. This composite structure enables the system to maintain high resolution across the wide field-of-view by correcting chromatic and spherical aberrations that would otherwise degrade image quality at wide angles.
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 lens assembly achieves a large aperture, wide field-of-view, high resolution, and miniaturization with low distortions and high illumination, maintaining imaging quality across varying temperatures.
Implementation Method 1
a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens, where the first lens, the second lens, the third lens, the fifth lens and the ninth lens each has a negative refractive power; the fourth lens, the sixth lens and the tenth lens each has a positive refractive power
Data Source
AI summary
The present disclosure relates to a wide-angle lens assembly, which comprises, sequentially along an optical axis from an object side to an image side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens. The first lens, the second lens, the third lens, the fifth lens and the ninth lens each has a negative refractive power; the fourth lens, the sixth lens and the tenth lens each has a positive refractive power; and a refractive power of the seventh lens and a refractive power of the eighth lens are positive-negative opposite.