Five-Lens Imaging Optics Balancing Wide FOV and Thermal Stability
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Solution Overview
Problem
Conventional optical systems struggle to balance high image quality, low sensitivity, proper aperture size, miniaturization, and desirable field of view due to rapid technological advancements in semiconductor manufacturing and increasing functionality requirements.
Innovation Solution
An optical imaging lens system comprising five lens elements with specific refractive powers, surface shapes, and axial distances, including a convex first lens element, concave fourth and fifth lens elements with inflection points, and an aperture stop, optimized to meet the balance of image quality and size requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional optical systems are used, then they can maintain a simple structure, but they cannot achieve high image quality while meeting miniaturization and field of view requirements
Solution Approach 1:
The optical system is divided into five distinct lens elements with specific refractive powers and surface shapes. Each lens element is optimized independently with particular curvature radii and thickness parameters, allowing the system to achieve high image quality through segmented functional distribution while managing overall complexity
Solution Approach 2:
Different regions of the lens surfaces are designed with varying properties - the paraxial regions have specific concave/convex configurations while inflection points are strategically placed in off-axis regions. This local differentiation allows optimization of both central and peripheral image quality across the field of view
2Volume of moving object
If the optical system is miniaturized, then the device size is reduced, but the field of view and image quality deteriorate
Solution Approach 1:
The lens elements utilize complex curved surfaces with inflection points rather than simple spherical or aspherical shapes. The fourth and fifth lens elements specifically incorporate inflection points on their image-side surfaces, enabling compact form factor while expanding the effective field of view through optimized light ray control
Solution Approach 2:
The system employs specific parameter relationships between lens elements - focal length ratios (f2/f, f4/f, f5/f), curvature radius ratios (R5/R6, R10), and axial distance ratios (T12, T23, T34, T45) are carefully controlled within defined ranges. These parameter optimizations enable miniaturization while maintaining or enhancing field of view characteristics
3Use of energy by moving object
If the aperture size is increased, then more light is captured, but the sensitivity to temperature changes increases
Solution Approach 1:
The system controls the aperture size relative to the focal length within a specific range (f/2.0 to f/4.0), optimizing the balance between light capture capability and temperature stability. This parameter control prevents excessive aperture size that would increase thermal sensitivity while maintaining sufficient brightness for image capture
4Adaptability or versatility
If multiple functional requirements are increased, then the system becomes more versatile, but the balance among image quality, sensitivity, aperture size, and miniaturization becomes difficult to achieve
Solution Approach 1:
The five-lens-element system is designed to simultaneously satisfy multiple requirements: high image quality (through optimized surface shapes and inflection points), compact size (through careful axial distance control), expanded field of view (through curvature optimization), and temperature stability (through aperture control). The system achieves multi-functionality without requiring separate specialized components for each function
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 achieves improved image quality, reduced sensitivity to temperature changes, and increased field of view while maintaining a compact size, effectively addressing the challenges of conventional systems.
Implementation Method 1
The five lens elements are, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. Each of the five lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side.
Data Source
AI summary
An optical imaging lens system includes five lens elements which are, in order from an object side to an image side along an optical path: a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. Each of the five lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The first lens element has positive refractive power. The image-side surface of the fourth lens element is concave in a paraxial region thereof. The object-side surface of the fifth lens element is convex in a paraxial region thereof, and the image-side surface of the fifth lens element is concave in a paraxial region thereof.