Six-Lens Optical Assembly for High Resolution and Large Aperture
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Solution Overview
Problem
The increasing demand for high-resolution camera lenses in automotive and surveillance fields poses challenges such as lens miniaturization, higher costs, and the need for larger apertures to improve night vision, while maintaining high pixel density and resolution.
Innovation Solution
An optical lens assembly comprising six lenses with specific refractive powers and surface configurations, including aspheric lenses and cemented lens designs, optimized for miniaturization, high pixels, and large aperture, while controlling the total track length and focal lengths to achieve compactness and improved imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the resolution of on-board lenses is increased from megapixel towards 2M, 4M and 8M, then the imaging quality and pixel density are improved, but the size of the chip and lens increases
Solution Approach 1:
The optical lens assembly is divided into six individual lenses with different refractive powers and surface configurations. This segmentation allows each lens to contribute specifically to resolving power while maintaining a compact overall structure, enabling high resolution (up to 8M pixels) without proportionally increasing lens size
Solution Approach 2:
Different lenses in the assembly have different local optical properties - some with positive refractive power and convex surfaces, others with negative refractive power and concave surfaces. This local differentiation optimizes light refraction at each stage, achieving high resolution imaging while controlling the total track length to around 45mm
2Illumination intensity
If the aperture of the lens is increased to improve night vision effect, then the amount of light entering is increased, but the size of the lens increases
Solution Approach 1:
The lens assembly incorporates multiple surfaces with different curvatures - convex surfaces on some lenses and concave surfaces on others. This curved surface design optimizes light refraction efficiency, allowing the lens to gather sufficient light for night vision (improving illumination intensity) while maintaining a compact form factor without requiring a proportionally larger aperture
3Measurement precision
If the number of lenses is increased to achieve higher pixels, then the resolution is improved, but the size of the entire lens and cost increases
Solution Approach 1:
The patent specifies precise parameter ranges for each lens including refractive power (positive or negative), surface curvature radii (R1, R2, etc.), and thickness (d1, d2, etc.). By controlling these parameters within specific ranges, the six-lens assembly achieves high pixel density (up to 8M) while managing overall complexity and enabling mass production
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 miniaturization of camera lenses, maintains high resolution and pixel density, and enhances night vision capabilities by increasing the amount of incident light, thus meeting the stringent requirements of on-board camera lenses.
Implementation Method 1
The first lens has positive refractive power, the second lens has negative refractive power, the third lens has positive refractive power, the fourth lens has positive refractive power, the fifth lens has positive refractive power, and the sixth lens has negative refractive power
Data Source
AI summary
The present disclosure discloses an optical lens assembly including, sequentially from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. An object-side surface of the first lens is convex, and an image-side surface thereof is concave. The second lens has negative refractive power. The third lens has positive refractive power. The fourth lens has positive refractive power, and both an object-side surface and an image-side surface thereof are convex. The fifth lens has positive refractive power. The sixth lens has negative refractive power.