Optical Lens with Segmented Groups for Wide Field Imaging
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Solution Overview
Problem
Current optical lenses face challenges in achieving a balance of low fabrication costs, high optical performance, wide viewing angles, light weight, and 24-hours confocal image-capturing capability while maintaining good imaging quality and a full field of view greater than 180 degrees.
Innovation Solution
The optical lens design comprises a first lens group with negative refractive power and a second lens group with positive refractive power, including at most nine lenses, with specific diameter and refractive power conditions, and incorporates an aperture stop between the groups, utilizing aspheric lenses to optimize light collection and reduce aberrations, allowing for a compact and efficient design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of lenses is increased to improve imaging quality and wide field of view, then optical performance is improved, but device complexity and fabrication cost increase
Solution Approach 1:
The optical lens is divided into two functional groups: a first lens group with negative refractive power and a second lens group with positive refractive power. This segmentation allows each group to perform specific optical functions, achieving wide field of view and good imaging quality with a reduced total number of lenses compared to conventional single-group designs.
Solution Approach 2:
The patent specifies precise refractive power parameters for each lens group (first group with negative power, second group with positive power) and defines specific focal length relationships. By optimizing these optical parameters, the system achieves high imaging quality with fewer lenses, resolving the contradiction between image quality and device complexity.
2Manufacturing precision
If more lenses are added to achieve wide field of view and high optical performance, then optical performance is improved, but fabrication cost increases
Solution Approach 1:
Dividing the optical system into two lens groups with opposite refractive powers simplifies the overall design and reduces the number of lenses needed. This segmentation enables cost-effective manufacturing while maintaining high optical performance through optimized group configurations rather than requiring many individual lenses.
Solution Approach 2:
By defining specific refractive power relationships and focal length ratios between the two lens groups, the patent optimizes the optical performance-to-cost ratio. These parameter specifications enable manufacturers to produce lenses with high performance using fewer components, directly reducing fabrication costs.
3Reliability
If the lens system is made more complex to achieve 24-hours confocal image-capturing capability, then imaging capability is improved, but device complexity increases
Solution Approach 1:
The patent uses a segmented two-group design where the first lens group with negative refractive power and the second lens group with positive refractive power work together to achieve confocal imaging across different wavelengths. This segmentation provides the necessary optical complexity for 24-hours confocal capability without requiring an excessive number of individual lens elements.
Solution Approach 2:
The patent specifies precise optical parameters including refractive powers, focal lengths, and their relationships to achieve 24-hours confocal image-capturing capability. By optimizing these parameters within a two-group structure, the system achieves reliable multi-wavelength confocal imaging without excessive device complexity.
4Manufacturing precision
If aspheric lenses are used to reduce aberrations and improve imaging quality, then optical performance is improved, but manufacturing difficulty increases
Solution Approach 1:
The patent incorporates aspheric lenses with specifically designed surface curvatures to reduce optical aberrations such as spherical aberration and coma. The aspheric parameters are optimized to achieve high imaging quality while remaining manufacturable using current molding and grinding technologies, balancing performance improvement with manufacturing feasibility.
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 achieves lighter weight, lower fabrication costs, and maintains good imaging quality and 24-hours confocal image-capturing capability with a wide field of view, while ensuring efficient light collection and minimizing chromatic aberrations across various wavelengths.
Implementation Method 1
a first lens group with a negative refractive power, a second lens group with a positive refractive power
Data Source
AI summary
An optical lens includes a first lens group with a negative refractive power, a second lens group with a positive refractive power, and an aperture stop disposed between the first lens group and the second lens group. The second lens group is disposed between the first lens group and the second side. The optical lens satisfies the conditions: 2.1<D1/D3<3.0 and 1.9<D1/DL<3.2, where D1 is a diameter of a surface of the first lens facing the first side, D3 is a diameter of a surface of the third lens facing the first side, DL is a diameter of a surface of a last lens facing the second side, and the last lens is nearest the second side as compared with any other lens of the optical lens.