Five-Piece Camera Lens Design for Wide Angle and Large Aperture
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Solution Overview
Problem
Traditional camera optical lenses for handheld devices face challenges in achieving a large aperture, wide angle, and ultra-thin design while maintaining good optical performance.
Innovation Solution
A five-piece camera optical lens design with specific refractive power and curvature radius conditions for each lens, including a positive and negative refractive power arrangement, optimized focal lengths, and curvature radii to correct aberrations and achieve a wide field of view and large aperture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a five-piece lens structure is used to improve optical performance, then imaging quality is improved, but the lens cannot achieve large aperture, ultra-thin and wide angle design requirements
Solution Approach 1:
The patent applies parameter changes by optimizing the focal lengths, curvature radii, and spacing of the five lens elements. Specific parameter ranges are defined (e.g., −3.50≤f2/f1−1.80, 1.00≤(R7+R8)/(R7−R8)≤1.75) to achieve the desired optical performance while meeting large aperture, ultra-thin, and wide angle requirements. This systematic parameter optimization resolves the contradiction between maintaining optical quality and achieving compact design specifications.
2Device complexity
If traditional three-piece or four-piece lens structure is used, then the structure is simpler, but the imaging quality and optical performance are insufficient
Solution Approach 1:
The patent applies segmentation by dividing the optical system into five distinct lens elements with specific refractive powers (positive, negative, negative, positive, negative). This segmentation allows each lens element to contribute to correcting specific aberrations and achieving the desired optical performance, thereby improving imaging quality while maintaining a manageable structural complexity through systematic design.
3Ease of manufacture
If lens focal power and spacing are not optimized, then manufacturing is easier, but the lens cannot meet large aperture and wide angle requirements
Solution Approach 1:
The patent defines specific parameter ranges for focal lengths (f1, f2, f3, f4, f5), curvature radii (R1 through R10), and spacing (d1 through d6) to achieve large aperture and wide angle performance. These parameter optimizations balance manufacturing feasibility with optical performance requirements, allowing the lens to meet stringent design specifications while remaining manufacturable through precise control of key dimensional parameters.
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 meets the requirements of a large aperture, wide angle, and ultra-thin structure, suitable for mobile camera lenses and webcams, with improved imaging quality and reduced chromatic aberrations.
Implementation Method 1
a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a negative refractive power, a fourth lens having a positive refractive power, and a fifth lens having a negative refractive power
Data Source
AI summary
A camera optical lens includes five-piece lenses, from an object side to an image side. The camera optical lens satisfies conditions of −3.50≤f2/f1≤−1.80, 1.00≤(R7+R8)/(R7−R8)≤1.75, 1.30≤d6/d4≤2.00, 5.00≤(R5+R6)/(R5−R6)≤20.00 and −5.00≤R9/R10≤−1.50. Here f1, f2 denote a focal length of the first lens and the second lens; R5, R6 denote a curvature radius of an object-side surface and an image-side surface of the third lens; R7, R8 denote a curvature radius of an object-side surface and an image-side of the fourth lens; R9, R10 denote a curvature radius of an object-side surface and an image-side surface of the fifth lens; d4 denotes an on-axis distance from an image-side surface of the second lens to the object-side surface of the third lens. The camera optical lens of the present disclosure has excellent optical performances, and meanwhile can meet design requirements of a large aperture, a wide angle and ultra-thin.