Six-Lens Camera Group for F/1.45 Aperture and Mass Production
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Solution Overview
Problem
Conventional camera lens groups with large apertures face challenges in mass production due to increased sensitivity and size, making it difficult to achieve high image quality and small F-numbers, especially in the range of 1.2 to 1.5, which is required for portable electronic devices like mobile phones.
Innovation Solution
A camera lens group comprising six lenses with specific refractive powers and surface configurations, including aspheric surfaces, is designed to achieve an F number of ≤1.45, optimizing optical parameters such as focal lengths, radii of curvature, and thicknesses to reduce size and improve image quality while maintaining high light convergence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the aperture of the camera is increased to improve light gathering and image clarity, then the F number decreases and image quality improves, but the size of the front lenses becomes very large and manufacturing sensitivity increases
Solution Approach 1:
The patent divides the camera lens group into six separate lens elements with specific refractive power distributions (++-+--). This segmentation allows each lens to have optimized dimensions and curvature radii, preventing any single lens from becoming excessively large while maintaining the overall large aperture capability of the system.
Solution Approach 2:
The patent specifies precise parameter ranges including F number (≤1.45), focal length ratios (0.95≤f23/f≤1.05), and curvature radius relationships (7.00≤R3/R4≤10.00). These parameter optimizations enable the lens group to achieve large aperture with controlled lens sizes and reduced manufacturing sensitivity through mathematical relationships between optical parameters.
2Illumination intensity
If the F number is decreased to improve light gathering, then image clarity improves, but the lens size and sensitivity become unmanageable for mass production
Solution Approach 1:
The patent establishes an F number ≤1.45 while simultaneously defining specific parameter relationships such as 1.00≤f23/f≤1.05 and 7.00≤R3/R4≤10.00. These parameter optimizations allow the system to achieve ultra-low F number for high light gathering while maintaining lens dimensions and tolerances suitable for automated mass production.
Solution Approach 2:
The patent designs a lens group configuration (++-+--) that simultaneously achieves multiple functions: ultra-low F number for light gathering, telephoto capability through focal length optimization, and mass production readiness through controlled sensitivity. This multi-functional design resolves the contradiction between performance and manufacturability.
3Illumination intensity
If the lens size is increased to achieve larger aperture, then light gathering improves, but the sensitivity and complexity of the optical system increase
Solution Approach 1:
The patent segments the optical system into six lens elements with distributed refractive powers. This segmentation allows the total aperture area to be large for light gathering while each individual lens element maintains manageable size and curvature, reducing overall system sensitivity and complexity.
Solution Approach 2:
The patent optimizes parameter relationships including focal length ratios (0.95≤f23/f≤1.05), curvature radius ratios (7.00≤R3/R4≤10.00), and spacing ratios (3.00≤T45/CT6≤5.00). These parameter relationships control optical sensitivity while maintaining large aperture capability, reducing system complexity through mathematical constraints.
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 enables the production of camera lens groups with ultra-small F-numbers, telephoto capabilities, and high image quality, addressing the challenges of sensitivity and size while enhancing manufacturability and image definition for portable devices.
Implementation Method 1
a first lens having refractive power, a convex object-side surface and a concave image-side surface; a second lens having positive refractive power, a convex object-side surface and a concave image-side surface
Implementation Method 2
at least one of the object-side surface of the first lens to the image-side surface of the sixth lens is aspheric
Data Source
AI summary
The present disclosure discloses a camera lens group including, sequentially from an object side to an image side along an optical axis, a first lens having refractive power, a convex object-side surface and a concave image-side surface; a second lens having positive refractive power, a convex object-side surface and a concave image-side surface; a third lens having negative refractive power, a concave object-side surface and a concave image-side surface; a fourth lens having positive refractive power, a convex object-side surface and a concave image-side surface; a fifth lens having refractive power; and a sixth lens having refractive power, a convex object-side surface and a concave image-side surface. An F number Fno of the camera lens group satisfies: Fno≤1.45.