Negative Meniscus Lens Set for 240° Wide-Angle Optical Systems
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Solution Overview
Problem
Current wide-angle optical systems struggle to achieve an angle of view greater than 240° with existing negative meniscus lens configurations, leading to limitations in image formation and projection capabilities due to issues with light ray refraction and aberrations.
Innovation Solution
A set of negative meniscus lenses with specific configurations, including a first and second meniscus lens with predetermined surface shapes and refractive indices, arranged to achieve an angle of view not smaller than 240°, utilizing hemispherical or surface extending beyond hemisphere surfaces to enable wide-angle viewing and correction of various aberrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional negative meniscus lens configurations are used, then the optical system can be manufactured with standard designs, but the angle of view is limited to less than 240°
Solution Approach 1:
The patent applies spherical surfaces to the negative meniscus lenses, specifically configuring the object-side surface as spherical. This curvature design enables the lenses to achieve an angle of view of 240° or more while maintaining manufacturability through standard spherical lens fabrication techniques.
Solution Approach 2:
The patent specifies particular parameter ranges for the negative meniscus lenses including focal length, radius of curvature, and refractive index to achieve the desired wide angle of view. By optimizing these parameters within defined ranges, the system achieves 240°+ field of view while keeping the lens configuration practical for manufacturing.
2Adaptability or versatility
If the angle of view is increased to greater than 240°, then wide-angle viewing capability is achieved, but aberrations increase and image formation deteriorates
Solution Approach 1:
The patent divides the optical system into multiple negative meniscus lenses with specific configurations. By segmenting the wide-angle correction function across multiple lenses rather than relying on a single element, the system achieves 240°+ angle of view while controlling aberrations through the combined optical power of the lens group.
Solution Approach 2:
The patent introduces intermediate lens elements between the object and image planes that serve to correct aberrations introduced by the wide-angle configuration. These intermediary lenses compensate for distortion and other optical defects, maintaining image quality across the extended 240° field of view.
3Adaptability or versatility
If hemispherical or extended hemispherical surfaces are used, then the angle of view reaches 240° or more, but the lens manufacturing precision requirements increase
Solution Approach 1:
The patent specifies that the object-side surface of the negative meniscus lens be spherical, which is a well-established and manufacturable surface type. This spherical configuration enables achievement of 240° angle of view while avoiding the need for complex free-form or aspherical surfaces that would demand ultra-high manufacturing precision.
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 allows for a wide-angle optical system capable of achieving an angle of view not smaller than 240°, effectively correcting aberrations and enabling clear image pickup and projection across a wide range, surpassing the limitations of previous systems.
Implementation Method 1
one negative meniscus lens in the set of negative meniscus lenses is located nearest to an object... the predetermined lens surface is a hemispherical surface or a surface extending beyond hemisphere
Data Source
AI summary
A set of negative meniscus lenses is a set which is to be used for an optical system having an angle of view not smaller than 240°. One negative meniscus lens in the set of negative meniscus lenses is located nearest to an object. The set of negative meniscus lenses has a predetermined lens surface, and the predetermined lens surface is a hemispherical surface or a surface extending beyond hemisphere.