Seven-Lens Wide-Angle Camera Lens Hybrid Glass-Plastic Design
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Solution Overview
Problem
Conventional wide-angle camera lenses face challenges in miniaturization while maintaining high imaging quality and large visual angles, as well as manufacturability, due to limitations in refractive power distribution and optical lens design.
Innovation Solution
A seven-lens wide-angle camera lens design with specific refractive power distributions and relational expressions for lens parameters, including negative and positive refractive powers, center thicknesses, and focal lengths, is employed to achieve miniaturization and high imaging quality, utilizing both glass and plastic aspheric surfaces for improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If all-glass construction is used to ensure imaging quality, then imaging quality is improved, but overall system length cannot be further shortened
Solution Approach 1:
The patent employs a hybrid optical system combining both glass optical lenses and plastic optical lenses. Specifically, the seven optical lenses include a mix of glass and plastic materials, allowing the system to achieve high imaging quality through glass lenses while reducing overall length and weight through plastic lenses. This composite material approach resolves the contradiction between maintaining imaging quality and minimizing system dimensions.
2Manufacturing precision
If conventional all-glass structures are used, then imaging quality is maintained, but field angle cannot be further enlarged
Solution Approach 1:
The hybrid glass-plastic lens construction enables the system to achieve ultra-wide field angles (120 degrees or more) while maintaining high imaging quality. The plastic lenses contribute to the wide angle capability with their ability to be molded into complex aspheric shapes, while glass lenses maintain image quality through superior optical properties.
Solution Approach 2:
The patent extensively employs aspheric surfaces on multiple optical lenses to achieve ultra-wide field angles and correct optical aberrations. The aspheric designs allow light rays to be properly focused across the entire wide field of view, enabling field angles of 120 degrees or more while maintaining imaging quality.
3Manufacturing precision
If more optical lenses are added to improve imaging quality, then imaging quality is improved, but device complexity increases
Solution Approach 1:
The patent uses aspheric surfaces on multiple lenses to correct optical aberrations and improve imaging quality. The aspheric designs allow each lens to perform multiple optical functions, reducing the need for additional lenses while maintaining high image quality across the ultra-wide field of view.
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 effectively realizes large field angles, high resolution, and good manufacturability, while reducing the size and cost of the camera lens, making it suitable for various applications including photography and vehicle-mounted devices.
Implementation Method 1
a first optical lens L1 having a negative refractive power, a second optical lens L2 having a negative refractive power, a third optical lens L3 having a positive refractive power, a fourth optical lens L4 having a positive refractive power, a fifth optical lens L5 having a negative refractive power, a sixth optical lens L6 having a positive refractive power, and a seventh optical lens L7 having a positive refractive power
Data Source
AI summary
A seven-lens wide-angle camera lens, having: a first lens with a negative refractive power; a second lens with a negative refractive power; a third lens with a refractive power; a fourth lens with a positive refractive power; a fifth lens with a refractive power; a sixth lens with a refractive power; and a seventh lens with a refractive power; and satisfies the following relational expressions: 0.06<CT3ΣTTL<0.15; and −0.7<f6/f7<−0.2; wherein, CT3 is a center thickness of the third lens that is on an optical axis; TTL is an axial distance from an object side surface to an imaging plane of the first lens; f6 is an effective focal length of the sixth lens; and f7 is an effective focal length of the seventh lens. By reasonably combining the 7 lenses, can obtain large field angles, which realizes miniaturization and favorable manufacturability while ensuring high resolution and imaging quality.