Six-Lens Camera Optical System for Wide-Angle Miniaturization
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Solution Overview
Problem
Existing camera lenses with 6 small lenses struggle to achieve wide-angle views over 100° and miniaturization while maintaining excellent optical properties, due to insufficient refractive power distribution and lens shapes, particularly in the first, second, and fourth lenses, leading to suboptimal performance in terms of total track length and image quality.
Innovation Solution
A camera lens design comprising 6 lenses with specific refractive power distributions and aspherical surfaces, where the first lens has negative power, the second and third lenses have positive power, the fourth and fifth lenses have negative power, and the sixth lens has positive power, with carefully defined focal length and curvature radius conditions to optimize wide-angle and miniaturization, including the use of a glass plate between the sixth lens and the image surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the camera lens uses 6 small lenses with conventional refractive power distribution, then the lens structure is compact, but the view angle cannot exceed 100° and the total track length is too large
Solution Approach 1:
The patent applies parameter changes by precisely controlling the refractive power distribution (f1/f, f2/f, f4/f ratios) and curvature radius relationships (R1/R2, R7/R8) of the six lenses. These parameter optimizations enable the compact 6-lens structure to achieve a view angle exceeding 100° while maintaining a reduced total track length, resolving the contradiction between compact size and wide-angle capability.
2Device complexity
If the first, second and fourth lenses have insufficient refractive power, then the lens structure is simple, but the view angle and total track length performance are suboptimal
Solution Approach 1:
The patent optimizes the refractive power parameters of the first, second, and fourth lenses by establishing specific ratio relationships (f1/f between -9.00 to -2.20, f2/f between 4.00 to 16.00, f4/f between -2.00 to -0.50). These parameter changes enhance the view angle performance without significantly increasing structural complexity, as the six-lens configuration is already established.
3Ease of manufacture
If the fourth and fifth lenses have insufficient shape optimization, then the manufacturing is easier, but the view angle and total track length are compromised
Solution Approach 1:
The patent addresses the shape optimization of the fourth and fifth lenses by defining specific curvature radius relationships (R7/R8 between -2.00 to -0.50 for the fourth lens). These parameter specifications balance manufacturing feasibility with optical performance, enabling the achievement of view angles exceeding 100° while maintaining reasonable total track length.
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 design achieves a wide-angle view exceeding 145° with a total track length of less than 5 mm, ensuring excellent optical properties, including corrected aberrations, lateral color, and field curvature, thereby addressing the limitations of previous designs.
Implementation Method 1
a first lens with negative refractive power, a second lens with positive refractive power, a third lens with positive refractive power, a fourth lens with negative refractive power, and a fifth lens with positive refractive power, a sixth lens with negative refractive power
Data Source
AI summary
The invention provides a camera lens. The camera lens includes, in an order from an object side to an image side: a first lens with a negative refractive power, a second lens with a positive refractive power, a third lens with a positive refractive power, and a fourth lens with a negative refractive power, a fifth lens with a positive refractive power and a sixth lens with a negative refractive power. The camera lens further satisfies specific conditions for providing improved performance.