Five-Lens Optical System Aberration Correction
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Solution Overview
Problem
Conventional optical systems in portable electronic devices face challenges in capturing high-quality images in low-light environments due to limited light intake and aberrations, particularly in miniaturized designs with multiple lenses.
Innovation Solution
A compact optical image capturing system utilizing a five-piece optical lens configuration with refractive powers, convex and concave surfaces, and an engaging component design to enhance light intake and imaging quality, including specific lens parameters and aberration correction mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the optical system uses three or four lenses to minimize device size, then the device complexity is reduced, but the light intake is insufficient and imaging quality deteriorates in low-light environments
Solution Approach 1:
The optical system is divided into five distinct lens elements (first through fifth lenses) with specific refractive power distributions. Each lens contributes to the overall light gathering capability while maintaining a compact form factor. The segmentation allows optimization of each lens's function to maximize light intake without proportionally increasing device complexity.
Solution Approach 2:
The patent specifies precise parameter ranges including focal length ratios (0.5≤|f1|/f2≤2.0), lens spacing ratios (0.3≤IN12/f≤1.5), and refractive index constraints (1.5≤Nd1≤2.0). These parameter optimizations enable the five-lens system to achieve superior light intake and imaging quality compared to conventional three or four-lens systems while controlling overall system complexity.
2Illumination intensity
If the optical system increases aperture to capture more light in dark environments, then the light intake is improved, but the aberrations increase and imaging quality deteriorates
Solution Approach 1:
Different lens elements are assigned specific local functions: the first lens (negative refractive power) handles initial light convergence, the second lens (positive refractive power) provides intermediate focusing, and the third through fifth lenses refine the optical path. Each lens surface is optimized with specific curvature radii and thicknesses to correct aberrations locally while maintaining overall light intake.
Solution Approach 2:
The optical system uses a composite arrangement of lenses with different refractive powers and material properties. The combination of negative and positive refractive power lenses creates complementary effects that correct chromatic and spherical aberrations. The patent specifies refractive index ranges (1.5≤Nd1≤2.0, 1.5≤Nd2≤2.0) to optimize material selection for aberration correction while maintaining high light transmission.
3Manufacturing precision
If the optical system uses five-piece optical lenses to increase light intake and improve imaging quality, then the imaging quality is improved, but the device complexity increases
Solution Approach 1:
Each of the five lenses serves multiple functions: the first lens (negative refractive power) not only converges light but also helps control spherical aberration; the second lens (positive refractive power) provides focusing while contributing to chromatic aberration correction. This multi-functionality allows the five-lens system to achieve superior imaging quality without requiring additional corrective elements, thereby controlling overall device complexity.
Solution Approach 2:
The patent employs aspheric surfaces on multiple lens elements to correct aberrations more effectively than spherical surfaces. The object-side and image-side surfaces of each lens are designed with specific curvature radii (R1, R2, R3, R4, R5, R6) that optimize light path control. This curvature optimization enables the five-lens system to achieve high imaging quality while minimizing the need for additional lens elements.
4Measurement precision
If the optical system minimizes the pixel size of the image sensing device to achieve high pixels, then the resolution is improved, but the light intake per pixel is reduced and imaging quality in low-light environments deteriorates
Solution Approach 1:
The optical system merges the light-gathering functions of five lens elements into a unified optical path that directs maximized light flux onto the image sensor. The combined refractive powers and carefully optimized lens spacing (IN12, IN23, IN34, IN45) ensure that light from the large entrance pupil is efficiently concentrated onto small pixels, compensating for the reduced light intake per pixel through system-level optimization.
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 system effectively increases light intake and improves imaging quality, correcting aberrations while maintaining a compact size, suitable for miniature electronic devices.
Implementation Method 1
The first lens has negative refractive power, and the second lens has positive refractive power. The third lens has positive refractive power, and the fourth lens has negative refractive power. The fifth lens has positive refractive power.
Data Source
AI summary
An optical image capturing system includes, along the optical axis in order from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. At least one lens among the first to the fifth lenses has positive refractive force. The fifth lens can have negative refractive force, wherein both surfaces thereof are aspheric, and at least one surface thereof has an inflection point. The lenses in the optical image capturing system which have refractive power include the first to the fifth lenses. The optical image capturing system can increase aperture value and improve the imaging quality for use in compact cameras.