Six-Lens Optical System for Wide-Angle High-Resolution Imaging
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Solution Overview
Problem
Conventional camera modules face challenges in designing lenses with a wide angle of view that can be used in combination with high-resolution image sensors while maintaining excellent optical performance and compact size.
Innovation Solution
The optical lens system comprises a sequence of lenses with specific refractive powers and surface curvatures, including a first lens with negative refractive power and a sixth lens with negative refractive power and inflection points, arranged to satisfy conditional expressions for optimal performance, and is made from materials with refractive indices of 1.5 to 1.6, including plastic for economical efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a lens is designed with a wide angle of view to capture more information, then the angle of view is improved, but optical performance such as aberration and distortion deteriorates
Solution Approach 1:
The optical lens system is divided into six individual lens elements (first lens L1 through sixth lens L6), each with specific refractive powers and surface curvatures. This segmentation allows each lens element to contribute differently to the overall optical performance, enabling wide angle of view while correcting aberrations through the combined action of multiple elements with alternating positive and negative refractive powers.
Solution Approach 2:
Different lens elements are assigned different local properties: the first lens has negative refractive power with a concave sensor-side surface, the second and third lenses have positive refractive power, the fourth lens has specific convex-concave surface characteristics, and the fifth and sixth lenses have positive and negative refractive powers respectively. This local differentiation of optical properties enables simultaneous achievement of wide angle of view and high optical quality.
2Volume of moving object
If the camera module is made smaller and thinner to improve user convenience, then the size is reduced, but the optical performance and image quality deteriorate
Solution Approach 1:
The optical lens system employs a dynamic configuration where the aperture is positioned between the second and third lenses, and the lens elements have varying refractive powers and surface curvatures optimized for compact form factor. This dynamic design allows the system to maintain high image quality in a reduced size by optimizing the spatial arrangement and optical properties of each element rather than simply scaling down a conventional design.
Solution Approach 2:
The patent specifies precise parameter ranges for each lens element including refractive powers, surface curvatures, and positional relationships. By carefully controlling these parameters - such as the negative refractive power of the first lens, the positive refractive power of the second and third lenses, and the specific surface configurations - the system achieves high optical performance in a compact form factor suitable for modern thin electronic devices.
3Measurement precision
If high-resolution image sensors are used to improve image quality, then the image resolution is improved, but the complexity of the optical lens system increases
Solution Approach 1:
The optical lens system is segmented into six lens elements with specific refractive powers and surface characteristics. This segmentation into manageable elements with defined properties (positive and negative refractive powers, convex and concave surfaces) allows the complex requirement of supporting high-resolution sensors to be met through a structured, modular approach rather than a monolithic complex design.
Solution Approach 2:
The optical lens system is designed with multi-functional lens elements that simultaneously perform multiple functions: correcting various types of aberrations, maintaining wide angle of view, supporting high-resolution sensor requirements, and enabling compact form factor. The aperture positioned between the second and third lenses also serves multiple functions including controlling light quantity and forming the optical stop, reducing the need for additional specialized components.
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
This configuration achieves a small, high-performance optical lens system with a wide angle of view suitable for high-resolution image sensors, reducing module height and achieving economical efficiency through the use of low-cost materials.
Implementation Method 1
an optical lens system including at least one lens and an image sensor that receives light passing through the optical lens system and converts the received light into an electric signal
Data Source
AI summary
An optical lens system is disclosed. The optical lens system includes a first lens that has negative refractive power, a second lens that has positive refractive power, a third lens that has positive refractive power, a fourth lens that has refractive power, a fifth lens that has positive refractive power, a sixth lens that has negative refractive power, an aperture located between the second lens and the third lens, and conditional expressions of “−1.4<tan θ/f<−1.1” and “4.0<TTL/BFL<6.0” are satisfied when θ is an angle of view of the optical lens system in a diagonal direction, f is a focal length of the optical lens system, TTL is a distance on an optical axis from the object-side surface of the first lens to the sensor, and BFL is a distance on the optical axis from the sensor-side surface of the sixth lens to the sensor.