Seven-Lens Optical Layout for Compact High-Resolution Camera Modules
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Solution Overview
Problem
Existing optical systems with multiple lenses face challenges in achieving excellent optical properties and aberration characteristics while maintaining a compact size, often leading to increased module size due to the thickness and interval of the lenses.
Innovation Solution
An optical system comprising first to seventh lenses arranged along an optical axis, with specific refractive powers and surface configurations, including concave and convex surfaces, and satisfying certain equations to optimize optical properties and reduce size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a plurality of lenses is included to improve optical properties and resolution, then image quality and resolution are improved, but the overall length and height increase due to lens thickness and intervals
Solution Approach 1:
The patent applies nesting by placing the optical system inside a housing structure where lenses are arranged in a compact sequence. The first lens group and second lens group are positioned closely together with minimized intervals, and the optical system is integrated into the housing such that the overall length is reduced while maintaining the plurality of lenses needed for high resolution.
Solution Approach 2:
The patent transitions from a traditional linear arrangement where lens count directly increases length, to a compact configuration where lenses are arranged in two groups (first and second lens groups) with optimized spacing. By reorganizing the spatial dimensionality and introducing a housing structure, the system achieves high resolution with reduced overall length and height.
2Reliability
If a plurality of lenses is included to achieve high efficiency optical system, then optical properties are improved, but the module size increases due to lens thickness and spacing
Solution Approach 1:
The patent merges the first lens group and second lens group into a unified optical system with minimized spacing. By combining multiple lenses into two functional groups and reducing the interval between them, the system achieves excellent optical properties while reducing the overall module volume compared to having separate lens assemblies.
Solution Approach 2:
The optical system with multiple lenses is nested within a compact housing structure. The lenses are arranged in a space-efficient sequence where the first lens group and second lens group are positioned closely together, and the entire assembly is integrated into the housing to minimize overall module size while maintaining optical performance.
3Volume of stationary object
If lens thickness and intervals are reduced to minimize module size, then compact design is achieved, but optical properties and aberration characteristics deteriorate
Solution Approach 1:
The patent optimizes specific parameters including the interval between the first and second lens groups, the focal lengths of individual lenses, and the refractive indices of lens materials. By carefully adjusting these parameters, the system achieves compact size with reduced lens thickness and spacing while maintaining excellent optical properties and aberration characteristics through mathematical optimization.
Solution Approach 2:
The patent applies different optical properties to different parts of the system. The first lens group and second lens group have different focal lengths and optical characteristics optimized for their specific functions. By assigning local quality differences to different lens groups and using materials with different refractive indices, the system achieves compact size while maintaining excellent overall optical performance.
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 optical system improves aberration and distortion characteristics, enhances resolution, and achieves a slim, compact design by controlling lens thickness and spacing, suitable for applications in compact devices.
Implementation Method 1
an optical system comprises first to seventh lenses sequentially arranged along an optical axis from an object side to an image side
Data Source
AI summary
An optical system disclosed to an embodiment of the invention includes first to seventh lenses sequentially arranged along an optical axis from the object side to the image side, wherein the first lens has a negative refractive power, and the third lens has a positive refractive power The object-side surface of the first lens may be concave, the object-side surface and the image-side surface of the third lens may be convex, and the third lens may be satisfied the following Equation 1: 0.5<f3/F<1.5 (In Equation 1, F denotes an effective focal length of the optical system, and f3 denotes a focal length of the third lens).