Anamorphic Lens Stigmatic Imaging Design
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Solution Overview
Problem
Anamorphic lenses often produce astigmatic images, which are undesirable for imaging applications as they lead to poor image quality, and existing designs face challenges with large size, weight, and difficulty in focusing.
Innovation Solution
An anamorphic lens design with two planes of symmetry, featuring a first lens section and a second lens section with anamorphic optical elements, a diaphragm in between, and specific focal length and refractive power relationships to achieve stigmatic imaging, along with a focusing unit composed of rotationally symmetrical elements to correct aberrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional anamorphic lenses with separate lens groups are used, then anamorphic imaging function is achieved, but the lens becomes heavy and difficult to focus
Solution Approach 1:
The patent combines multiple lens groups into a single integrated anamorphic lens structure, merging the functions of different lens elements into one compact unit. This integration eliminates the need for separate lens groups while maintaining the anamorphic imaging capability, thereby reducing overall weight and simplifying the focusing mechanism.
Solution Approach 2:
The anamorphic lens is designed to perform multiple functions within a single optical element, including anamorphic imaging, focusing, and aberration correction. By incorporating universal design principles, the lens achieves versatile functionality without requiring additional separate components, thus reducing weight while maintaining reliability.
2Reliability
If traditional anamorphic lenses with separate lens groups are used, then anamorphic imaging function is achieved, but the lens becomes difficult to focus
Solution Approach 1:
The patent merges the focusing mechanism with the integrated lens structure, allowing focusing to be achieved through a single unified system rather than coordinating multiple separate lens groups. This integration simplifies the focusing operation while maintaining the anamorphic imaging function.
Solution Approach 2:
The lens incorporates dynamic focusing capabilities within its integrated structure, enabling smooth and precise focusing adjustments. The dynamic design allows the lens to adapt its focal length and maintain sharp focus across different shooting distances without the mechanical complexity of traditional multi-group systems.
3Quantity of substance
If anamorphic optical elements are used to achieve compression, then image compression is achieved, but astigmatic distortion occurs
Solution Approach 1:
The patent employs optical elements with locally varied properties, where different regions of the lens have specifically tailored refractive indices and surface curvatures. This local quality optimization allows the lens to maintain compression ratios while correcting astigmatic distortion in specific areas, thereby improving overall image quality without sacrificing compression capability.
Solution Approach 2:
The lens design utilizes parameter changes in the optical elements, such as varying refractive indices, surface curvatures, and thickness distributions, to achieve both compression and aberration correction. By carefully adjusting these parameters, the lens maintains the desired compression ratio while minimizing astigmatic distortion and other optical aberrations.
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 design achieves stigmatic imaging, improving image quality and facilitating focusing, while maintaining a more compact and lightweight structure compared to traditional anamorphic lenses.
Implementation Method 1
The anamorphic optical element exhibits a first refractive power with respect to the first plane of symmetry and a second refractive power with respect to the second plane of symmetry
Data Source
Figure 1A~1B
Figure 2A~2B
AI summary
The lens (100) has two objective lens sections (200, 300) arranged in the direction of an image detection unit (BE), and a diaphragm (B) arranged between the lens sections, where a symmetry plane of the lens is oriented perpendicular to another symmetry plane. Two anamorphic lenses (L5, L15) are arranged in the respective lens sections, where the lens fulfills a condition in which distance (S't) between one of the lens sections and the detection unit in the former plane is equal to distance (S'w) between the lens section and the detection unit in the latter plane.