Ten-Lens Imaging Optics for Low-Light Resolution and Wide FOV
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Solution Overview
Problem
Existing imaging lens systems struggle to achieve high-resolution imaging in low-light environments due to limitations in f-number and optical characteristics, making it difficult to capture clear images in dark conditions.
Innovation Solution
An imaging lens system comprising a sequence of lenses with specific focal length and refractive power configurations, including a first lens with positive refractive power and convex object-side surface, a second lens with positive refractive power and convex object-side surface, and subsequent lenses with varying refractive powers and surface curvatures, optimized to achieve a low f-number and improved performance in low-light conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the f-number is reduced to enable high-resolution imaging in low-light environments, then the light-gathering capability is improved, but the optical system complexity increases
Solution Approach 1:
The optical system is divided into multiple lens groups (first through tenth lenses) with alternating positive and negative refractive powers. This segmentation allows each lens to contribute differently to light gathering, enabling a low f-number (1.54) while distributing the optical complexity across manageable components rather than requiring a single complex element.
Solution Approach 2:
The patent employs systematic variation of key optical parameters including refractive indices (ranging from 1.52 to 1.70), Abbe numbers (ranging from 20 to 60), and surface curvatures across the ten lenses. This parameter optimization enables the system to achieve f-number 1.54 with controlled aberrations, resolving the contradiction between light gathering and system complexity.
2Measurement precision
If multiple lenses with varying refractive powers are used to achieve low f-number, then the imaging performance in low-light is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent specifies precise parameter ranges for manufacturing: refractive indices between 1.52-1.70, Abbe numbers between 20-60, and controlled surface curvatures. These parameter windows provide manufacturing flexibility while ensuring the final system achieves the required imaging resolution and low f-number performance.
Solution Approach 2:
Different lens elements are designed with locally optimized properties - some lenses have higher refractive indices for compactness, others have higher Abbe numbers for chromatic aberration control. This local quality differentiation allows each lens to be manufactured within reasonable tolerances while the collective system achieves high imaging precision.
3Volume of moving object
If a compact lens system is designed for portable devices, then the device size is reduced, but the field of view may be limited
Solution Approach 1:
The patent achieves a compact form factor (TTL 3.24mm) while maintaining a wide field of view (72 degrees) through dynamic optimization of the lens arrangement. The alternating positive-negative lens groups create a compact folded optical path that expands the effective field of view without increasing the physical footprint, enabling portable device integration.
Solution Approach 2:
The optical system uses a ten-lens configuration that extends along the optical axis (depth dimension) rather than increasing lateral dimensions. This dimensional strategy allows the camera module to maintain a compact footprint suitable for portable devices while achieving both wide field of view and low f-number through careful spacing and curvature design in the depth direction.
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 enables high-resolution imaging with a low f-number, allowing for clear image capture in low-light environments while maintaining a wide field of view and compact design suitable for portable electronic devices.
Implementation Method 1
a first lens having positive refractive power, a second lens having positive refractive power, a third lens having refractive power, a fourth lens having refractive power, a fifth lens having refractive power and a convex image-side surface, a sixth lens having refractive power and a concave image-side surface, a seventh lens having refractive power and a convex object-side surface, an eighth lens having negative refractive power, a ninth lens having refractive power, a tenth lens having refractive power
Data Source
AI summary
An imaging lens system according to an embodiment of the present disclosure includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens, sequentially disposed from an object-side toward an imaging plane. The following conditional expressions are satisfied, f number≤1.69, and TTL/(2*ImgHT)<0.730 where TTL is a distance from an object-side surface of the first lens to the imaging plane, and ImgHT is a height of the imaging plane.