Five-element Camera Lens Design for Compact Imaging
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Solution Overview
Problem
There is a need for ultra-thin wide-angle camera lenses with good optical characteristics and fully corrected chromatic aberration, particularly for handheld devices like smartphones and digital cameras, where the pixel area of photosensitive devices is shrinking and imaging quality requirements are increasing.
Innovation Solution
A five-piece camera optical lens design is proposed, comprising lenses with specific refractive powers, Abbe numbers, and thicknesses, along with aspherical surfaces and optical filters, to minimize system length and improve imaging quality while reducing chromatic aberration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a five-piece or more lens structure is adopted to improve imaging quality, then imaging quality and chromatic aberration correction are improved, but the system length and device thickness increase
Solution Approach 1:
The patent applies parameter changes by carefully selecting and optimizing the refractive indices (n1, n2, n3, n4, n5) and Abbe numbers (v1, v2, v3, v4, v5) of each lens element, along with their respective thicknesses (d1, d2, d3, d4, d5) and air gaps (d6, d7, d8, d9). By adjusting these optical parameters within specific ranges, the design achieves chromatic aberration correction and high imaging quality while maintaining a compact system length of 4.4mm or less.
Solution Approach 2:
The patent employs aspherical surfaces on multiple lens elements (first lens object side surface R1, first lens image side surface R2, second lens object side surface R3, third lens image side surface R6, fourth lens object side surface R7, fifth lens image side surface R10). These curved aspherical surfaces enable precise control of light paths, correcting optical aberrations including chromatic aberration while allowing for a shorter overall system length compared to traditional spherical lens designs.
2Volume of moving object
If the pixel area of photosensitive devices is reduced to enable miniaturization, then device size is reduced, but imaging quality and optical performance deteriorate
Solution Approach 1:
The patent divides the optical system into five distinct lens elements (first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5), each with specific optical powers and characteristics. This segmentation allows for distributed correction of optical aberrations across multiple elements, enabling high imaging quality suitable for small pixel photosensitive devices while maintaining a compact form factor.
Solution Approach 2:
The patent assigns different optical properties to different lens elements: the first lens has positive refractive power with specific curvature radii, the second and third lenses have negative refractive power with specific Abbe numbers for chromatic correction, the fourth lens has positive refractive power, and the fifth lens has negative refractive power. Each element is optimized with specific aspherical surface parameters to address local optical quality requirements, achieving overall high performance in a miniaturized 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 design achieves high-performance imaging with reduced length, suitable for high-pixel portable cameras, and enhances imaging quality in low-illumination environments by maintaining miniaturization and correcting optical color differences.
Implementation Method 1
the first lens has a positive refractive power, the second lens has a negative refractive power, the third lens has a negative refractive power, the fourth lens has a positive refractive power, and the fifth lens has a negative refractive power
Data Source
AI summary
The present disclosure discloses a camera optical lens. The camera optical lens includes, in an order from an object side to an image side, an aperture, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The camera optical lens further satisfies specific conditions.