Six-Lens Optical Assembly for Compact High-Resolution Imaging
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Solution Overview
Problem
Existing vehicle-mounted optical lens assemblies face challenges in achieving high resolution, miniaturization, and environmental stability while maintaining low cost and effective chromatic aberration correction, particularly in complex road conditions and varying temperatures.
Innovation Solution
An optical lens assembly comprising six lenses with specific refractive powers and surface configurations, including aspheric lenses and cemented lenses, optimized for compact design and improved imaging quality, with features like TTL/F≤6 and D/H/FOV≤0.1, to enhance resolution and reduce chromatic aberrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of lenses is increased to improve imaging quality, then resolution and chromatic aberration correction are improved, but manufacturing cost increases and device size increases
Solution Approach 1:
The optical lens assembly is divided into multiple lens groups with different refractive powers and surface configurations. Each lens group (first through sixth lenses) is optimized for specific functions such as chromatic aberration correction and field of view control, allowing high imaging quality to be achieved through coordinated action of segmented components rather than simply increasing the total number of lenses
Solution Approach 2:
Different lens surfaces are designed with specific properties: object-side convex surfaces, image-side concave surfaces, and aspheric surfaces are strategically positioned to address local optical challenges. The sixth lens specifically targets chromatic aberration correction with its negative refractive power and optimized surface curvatures, while other lenses handle different aspects of image quality
Solution Approach 3:
The patent optimizes specific parameter ratios such as TTL/F≤6 and D/H/FOV≤0.1 to achieve high imaging quality. By carefully controlling focal lengths, track lengths, and aperture ratios rather than simply adding more lenses, the system achieves superior performance with a manageable number of optical elements
2Measurement precision
If the number of lenses is increased to improve imaging quality, then chromatic aberration correction is improved, but manufacturing cost increases
Solution Approach 1:
The sixth lens is specifically designed with negative refractive power and optimized surface configurations (object-side convex/concave or concave/convex surfaces) to target chromatic aberration correction. This localized approach assigns specific correction functions to specific lens elements rather than relying on a large number of lenses, reducing manufacturing complexity and cost
Solution Approach 2:
Multiple lenses in the assembly serve dual purposes: the first through fifth lenses contribute to both image formation and chromatic aberration correction, while the sixth lens provides specialized chromatic correction. This multi-functionality reduces the need for additional dedicated correction lenses, lowering manufacturing costs
3Volume of moving object
If the optical lens assembly is miniaturized, then device size is reduced, but imaging quality and environmental stability may deteriorate
Solution Approach 1:
The patent achieves miniaturization by optimizing the TTL/F ratio to ≤6, which controls the relationship between track length and focal length. This parameter optimization allows the optical assembly to be compact while maintaining the optical path length necessary for high-quality image formation and environmental stability
Solution Approach 2:
The patent uses aspheric surfaces on multiple lenses to correct aberrations in a more space-efficient manner compared to traditional spherical lenses. The aspheric configurations (object-side convex/concave or concave/convex surfaces) enable better optical performance in a reduced form factor by controlling light paths more effectively in three-dimensional space
4Volume of moving object
If the optical lens assembly is miniaturized, then device size is reduced, but chromatic aberration correction may worsen
Solution Approach 1:
The sixth lens is specifically configured with negative refractive power and optimized surface curvatures to provide targeted chromatic aberration correction within the miniaturized assembly. This localized correction approach ensures that chromatic performance is maintained even as the overall device size is reduced
Solution Approach 2:
The patent optimizes the D/H/FOV ratio to ≤0.1, which controls the relationship between aperture diameter, image height, and field of view. This parameter optimization enables effective chromatic aberration correction in the compact design by carefully managing the angular spread of light rays through the optical system
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 solution achieves high resolution up to 8 million pixels, good chromatic aberration correction, miniaturization, and stable imaging quality across varying temperatures, ensuring compatibility with on-board chips and enhancing safety in autonomous driving systems.
Implementation Method 1
a first lens, having a negative refractive power, an object-side surface of the first lens being a convex surface, and an image-side surface of the first lens being a concave surface; a second lens, having a negative refractive power... a third lens, having a positive refractive power... a fourth lens, having a negative refractive power... a fifth lens, having a positive refractive power... and a sixth lens having a refractive power
Data Source
AI summary
An optical lens assembly and an electronic device are provided. From an object side to an image side along an optical axis, the optical lens sequentially comprises: a first lens (L1) having a negative refractive power, wherein the object-side surface (S1) of the first lens is a convex surface, and the image-side surface (S2) of the first lens is a concave surface; a second lens (L2) having refractive power, wherein the object-side surface (S3) of the second lens is a concave surface, and the image-side surface (S4) of the second lens is a convex surface; a third lens (L3) having positive refractive power; a fourth lens (L4) having refractive power, wherein the object-side surface (S8) of the fourth lens is a convex surface; a fifth lens (L5) having refractive power; and a sixth lens (L6) having refractive power.