Six-Lens Optical Assembly for Wide Field of View and Compact Size
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Solution Overview
Problem
Conventional compact optical systems fail to simultaneously achieve a wide field of view, compact size, low environmental sensitivity, and high image resolution, making them unsuitable for modern electronic devices with camera functionalities.
Innovation Solution
An imaging optical lens assembly comprising six lens elements with specific refractive powers and curvature radii, including negative and positive refractive powers, and aspheric surfaces, is designed to optimize image quality, correct aberrations, and reduce sensitivity, while maintaining a compact form factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional compact optical systems are used, then the device size is reduced, but the field of view becomes narrow and image resolution deteriorates
Solution Approach 1:
The optical system is divided into six distinct lens elements with specific refractive powers (first and second negative, third negative, fourth positive, fifth negative, sixth positive). This segmentation allows each element to contribute differently to the overall optical performance, enabling a compact form factor while maintaining a wide field of view through optimized light path management
Solution Approach 2:
The patent employs aspheric surfaces on multiple lens elements (first, second, third, fourth, and sixth lens elements) to control off-axis light rays. This dimensional complexity in surface geometry enables the system to achieve a wide field of view without proportionally increasing the optical path length, thus maintaining compactness
2Volume of moving object
If conventional compact optical systems are used, then the device size is reduced, but image resolution and aberration correction deteriorate
Solution Approach 1:
Different lens elements are assigned specific refractive powers and surface characteristics tailored to their local optical functions. The first and second lens elements with negative refractive power handle specific aberration types, while the fourth lens element with positive refractive power compensates for others. This localized optimization of optical properties across the six elements achieves high image resolution within a compact form factor
Solution Approach 2:
The patent utilizes aspheric surfaces on five out of six lens elements to correct spherical aberration and other off-axis aberrations. The aspheric coefficients are specifically optimized for each surface, allowing precise control of light ray paths throughout the compact optical system, thereby maintaining high image resolution without requiring a larger aperture or longer focal length
3Volume of moving object
If conventional compact optical systems are used, then the device size is reduced, but environmental sensitivity increases
Solution Approach 1:
The six lens elements are designed to simultaneously perform multiple functions: focusing light, correcting various types of aberrations (spherical, coma, astigmatism, field curvature), and managing chromatic aberration. This multi-functionality is achieved through the specific arrangement of refractive powers and aspheric surfaces, allowing the compact system to maintain stable optical performance across varying environmental conditions without requiring additional compensating mechanisms
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 solution provides an optical system with improved image quality, corrected aberrations, and reduced sensitivity, enabling wider field of view and compactness, suitable for various electronic devices such as smartphones and surveillance cameras.
Implementation Method 1
The first lens element has negative refractive power, the second lens element has negative refractive power, the third lens element has negative refractive power
Data Source
AI summary
An imaging optical lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The first lens element has negative refractive power. The second lens element has negative refractive power. The third lens element has negative refractive power. The imaging optical lens assembly has a total of six lens elements.