Five-Lens Imaging System with Air Gaps for Compact Wide-Angle Design
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Solution Overview
Problem
Existing imaging lenses face challenges in achieving a wide angle of view and short total length while maintaining high imaging performance and low production costs, particularly in devices like cellular telephones and smart phones, due to limitations in refractive power configurations and the use of cemented lenses.
Innovation Solution
The development of a five-lens imaging lens configuration with all single lenses, including a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with negative refractive power, and a fifth lens with a negative refractive power and an inflection point towards the image side, optimized by specific conditional formulae to reduce total length and production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cemented lenses are used to achieve wide angle of view and short total length, then imaging performance is improved, but production cost increases and manufacturing complexity increases
Solution Approach 1:
The patent removes the cemented lens structure from the optical system, extracting the adhesive attachment step entirely. By using air gaps between lens elements instead of cement, the manufacturing process is simplified and costs are reduced while maintaining the five-lens configuration needed for wide angle of view and short total length.
Solution Approach 2:
The patent changes the manufacturing parameters by eliminating the adhesive attachment process. Instead of using cemented lens elements with specific bonding requirements, the design allows for separate lens elements positioned with air gaps, fundamentally changing how the optical system is assembled and producing lower production costs.
2Reliability
If cemented lenses are used to achieve wide angle of view and short total length, then imaging performance is improved, but manufacturing process complexity increases
Solution Approach 1:
The patent extracts and removes the adhesive attachment step from the manufacturing process. By replacing cemented lens elements with air-gap separated elements, the complex multi-step process of applying, curing, and inspecting adhesives is eliminated, simplifying the overall manufacturing process while maintaining optical performance.
3Reliability
If lens configuration is enlarged to meet desired image size, then image quality is improved, but total length becomes excessively long
Solution Approach 1:
The patent optimizes the physical parameters of the five-lens configuration, specifically the spacing and curvature of each lens element. By carefully selecting the focal lengths and positions of the five lenses, the system achieves the desired image size and quality while minimizing the total length through efficient optical design.
Solution Approach 2:
The patent addresses the length constraint by optimizing the optical path in multiple dimensions. The five-lens configuration is arranged to achieve the required image size through careful control of light paths in both longitudinal and transverse dimensions, allowing compact total length while maintaining image quality.
4Reliability
If five-lens configuration is used to shorten total length and increase resolution, then imaging performance is improved, but production cost increases due to adhesive agents
Solution Approach 1:
The patent removes the adhesive agents from the optical system by replacing cemented lens elements with air-gap separated elements. This extraction of the adhesive attachment step eliminates the need for adhesive materials and associated application processes, reducing production costs while maintaining the five-lens configuration for high imaging 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
This configuration allows for a wide angle of view, short total length, and high imaging performance from central to peripheral angles, while eliminating the need for adhesive attachment steps, thus reducing production costs and improving lens design flexibility.
Implementation Method 1
a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a negative refractive power, a fourth lens having a negative refractive power
Data Source
AI summary
An imaging lens is substantially constituted by five lenses, including: a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a negative refractive power; a fourth lens having a negative refractive power; a fifth lens having a negative refractive power and an inflection point on the surface thereof toward the image side. All of the first lens through the fifth lens are single lenses, and the imaging lens satisfies predetermined conditional formulae.