Wide-Angle Optical Lens Group Layout for Short-Distance Aberration Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wide-angle lenses suffer from insufficient correction of field curves and aberrations, particularly when focusing on short distance objects, necessitating improved aberration correction for better optical performance.
Innovation Solution
An optical system comprising multiple lens groups, including a leading lens group, a first focusing lens group with positive refractive power, and a second focusing lens group with negative refractive power, arranged in a specific configuration to satisfy conditional expressions that optimize the distance and movement of these groups for effective aberration correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional wide-angle lens configuration is used, then the lens structure is simple, but the correction of field curves and aberrations is insufficient, especially when focusing on short distance objects
Solution Approach 1:
The lens is divided into multiple lens groups with different functions: a leading lens group for wide-angle coverage, a first focusing lens group with positive refractive power for focusing, and a second focusing lens group with negative refractive power for aberration correction. This segmentation allows each group to be optimized for its specific function, achieving superior aberration correction while maintaining reasonable structural complexity
Solution Approach 2:
An intermediate lens group is introduced between the first and second focusing lens groups to act as a mediator. This intermediate group helps transmit light between the focusing groups while contributing to overall aberration correction, enabling the system to achieve high optical performance without excessive complexity
2Manufacturing precision
If the first focusing lens group moves toward the image surface and the second focusing lens group moves toward the object upon focusing, then aberration correction is improved, but the movement distance and structural complexity increase
Solution Approach 1:
The patent optimizes the refractive powers and positions of the first and second focusing lens groups to satisfy specific conditional expressions. By carefully controlling the movement distances and positions of these groups during focusing, the system achieves effective aberration correction while minimizing the overall movement distance and maintaining a compact structure
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 proposed configuration achieves high optical performance by satisfactorily correcting aberrations, especially when focusing on short distance objects, while maintaining a compact size and minimizing fluctuations in aberrations throughout the focusing range.
Implementation Method 1
The first focusing lens group has positive refractive power and moves toward an image surface along an optical axis upon focusing from an infinity object to a short distance object
Implementation Method 2
The second focusing lens group has negative refractive power and moves toward an object along an optical axis upon focusing from an infinity object to a short distance object
Data Source
AI summary
An optical system comprising a plurality of lens groups arranged on an optical axis and comprising a leading lens group, a first focal lens group, and a second focal lens group. The leading lens group is arranged further on the object side than the first focal lens group and the second focal lens group is arranged further on the image side than the first focal lens group. The first focal lens group has positive refractive power and moves along the optical axis to the image side when focusing from an infinite object to a short-distance object. The second focal lens group: has a negative refractive power; travels along the optical axis to the object side when focusing from an infinite object to a short-distance object; and has, between the first focal lens group and the second focal lens group, an intermediate lens group that includes at least one lens.