Optical Lens Design for Wide-Angle Imaging and Aberration Correction
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Solution Overview
Problem
Conventional wide-angle optical lenses face challenges in achieving high imaging quality, miniaturization, tolerance of environmental variations, and minimizing thermal drift while maintaining a large aperture and wide viewing angle.
Innovation Solution
The optical lens design includes a first lens group with negative refractive power and a second lens group with positive refractive power, featuring aspheric lenses and cemented lenses, which reduces the number of lenses and costs, and improves aberration correction, achieving a wide field of view and good optical effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If conventional wide-angle optical lens design is used, then wide viewing angle is achieved, but the volume cannot be easily reduced and imaging quality deteriorates
Solution Approach 1:
The optical lens is divided into multiple lens groups (first lens group with negative refractive power, second lens group with positive refractive power) and individual lenses with specific refractive powers. This segmentation allows each component to be optimized for specific functions: wide-angle light collection and aberration correction, respectively, thereby achieving both wide viewing angle and high imaging quality simultaneously
Solution Approach 2:
Different regions of the optical lens have different properties: the first lens group has negative refractive power for wide-angle light collection, while the second lens group has positive refractive power for image quality improvement. Additionally, aspheric lenses are used in specific positions to correct aberrations locally, ensuring high imaging quality across the entire field of view
2Manufacturing precision
If more lenses are added to improve imaging quality, then aberration correction improves, but the number of lenses and costs increase
Solution Approach 1:
The patent specifies precise refractive power parameters for each lens group and lens (first lens group with negative refractive power, second lens group with positive refractive power, and specific refractive powers for individual lenses). These parameter optimizations enable effective aberration correction with a limited number of lenses, reducing both the total lens count and manufacturing costs while maintaining high imaging quality
Solution Approach 2:
The optical lens uses composite lens structures including cemented lenses (where two lenses are optically bonded) and aspheric lenses combined with spherical lenses. This composite approach allows different lens types to work together synergistically, achieving superior aberration correction with fewer components compared to using uniform lens types throughout
3Volume of moving object
If lens volume is reduced for miniaturization, then compact size is achieved, but tolerance to environmental variations deteriorates
Solution Approach 1:
The patent specifies precise parameter ranges for lens thicknesses (D1, D2, D3, D4, D5, D6) and spacing (T1, T2, T3, T4, T5) that optimize the balance between compact size and environmental stability. By carefully controlling these parameters within defined ranges, the lens achieves miniaturization while maintaining sufficient mechanical strength and optical performance tolerance against environmental variations
Solution Approach 2:
Instead of simply reducing lens size which would compromise environmental tolerance, the patent inverts the approach by optimizing the internal structure and parameter distribution of the compact lens. The specific arrangement of lens groups with opposite refractive powers and the use of cemented lenses create a structurally robust compact design that unexpectedly achieves both miniaturization and environmental tolerance
4Manufacturing precision
If aspheric lenses are used to improve resolution, then imaging quality improves, but manufacturing complexity increases
Solution Approach 1:
The optical lens segments the aspheric surface requirement across multiple lenses rather than requiring one complex aspheric lens. By distributing the aspheric surfaces across several lenses (first lens, second lens, fourth lens, fifth lens, sixth lens), each with potentially simpler aspheric profiles, the overall resolution is improved while individual manufacturing complexity is reduced compared to a single complex aspheric element
Solution Approach 2:
Aspheric surfaces are applied locally to specific lenses where they are most needed for aberration correction, rather than making all lenses aspheric. This selective application of aspheric surfaces to the first lens, second lens, fourth lens, fifth lens, and sixth lens optimizes resolution where required while minimizing the overall manufacturing complexity of the complete optical system
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 design effectively reduces the number of lenses and costs, improves aberration correction, and achieves high imaging quality with a wide field of view and good optical effects, while maintaining a compact size and tolerance to environmental variations.
Implementation Method 1
The first lens group has a negative refractive power and includes three lenses with refractive powers. The first lens group includes a lens with a positive refractive power and an aspheric lens.
Implementation Method 2
the second lens group closest to the minified side is a cemented lens
Data Source
AI summary
An optical lens includes a first lens group, an aperture, and a second lens group which are sequentially arranged along an optical axis from a magnified side to a minified side. The first lens group has a negative refractive power and includes three lenses with refractive powers. The first lens group includes a lens with positive refractive power. The first lens group includes an aspheric lens. The second lens group has a positive refractive power and includes three lenses with refractive power. The second lens group includes a lens with a negative refractive power. The second lens group includes a lens closest to the minified side which is a cemented lens. The second lens group includes an aspheric lens. In the optical lens, a number of the lenses having the refractive powers is within a range from 6 to 8.