Five-Lens Wide-Angle Assembly for Compact Aberration Control
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Solution Overview
Problem
Miniaturized electronic devices face challenges in maintaining wide-angle characteristics and securing optical performance due to limited space, making it difficult to implement lens assemblies with stable optical performance.
Innovation Solution
A lens assembly with a small total lens length relative to the image height of an image sensor, featuring a specific arrangement of lenses with negative and positive refractive powers, and conditional expressions to ensure wide-angle performance and aberration control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the lens assembly is miniaturized to fit limited space in electronic devices, then the device size is reduced, but the wide-angle performance and optical stability deteriorate
Solution Approach 1:
The lens assembly is divided into five separate lens elements (first through fifth lenses) with alternating negative and positive refractive powers. This segmentation allows each lens to contribute specifically to aberration correction and enables the overall assembly to achieve wide-angle performance in a compact form factor, resolving the contradiction between miniaturization and optical stability.
Solution Approach 2:
The patent employs specific conditional expressions that define relationships between focal lengths, refractive powers, and spacing of the five lens elements. By optimizing these parameters according to the prescribed conditions, the lens assembly achieves stable optical performance and wide-angle characteristics while maintaining a miniaturized size, thus resolving the contradiction between compactness and optical reliability.
2Volume of moving object
If the lens assembly is miniaturized to reduce device size, then the volume is reduced, but the wide-angle characteristics are compromised
Solution Approach 1:
The five-lens segmented structure enables the compact assembly to achieve wide-angle performance through coordinated action of individual elements with alternating refractive powers, overcoming the limitation that smaller lenses typically provide narrower fields of view.
Solution Approach 2:
The patent specifies conditional expressions that optimize the focal lengths and spacing of the five lens elements to achieve wide-angle characteristics (FOV ≥ 100 degrees) while maintaining miniaturization, thus resolving the contradiction between compact size and wide-angle adaptability.
3Reliability
If a plurality of lenses with alternating refractive powers is used to control aberration, then the optical performance is improved, but the lens assembly length increases
Solution Approach 1:
The patent establishes conditional expressions that define optimal relationships between the focal lengths, refractive powers, and spacing of the five lens elements. These parameter optimizations enable effective aberration control through the alternating positive-negative lens structure while constraining the total lens length to remain compact, thus resolving the contradiction between aberration control and assembly length.
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 lens assembly achieves miniaturization while maintaining wide-angle performance and facilitating aberration control, enhancing the optical capabilities of miniaturized electronic devices.
Implementation Method 1
a first lens L1 having a negative refractive power and including a concave object-side surface S2 and a convex image sensor-side surface S3, a second lens L2 having a positive refractive power and including a convex object-side surface S5 and a convex image sensor-side surface S6
Data Source
AI summary
A lens assembly may include: an image sensor; and lenses including a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The lenses may be aligned with an optical axis of the image sensor. The first lens may have a negative refractive power and include a concave object-side surface and a convex image sensor-side surface, the second lens may have a positive refractive power and include a convex object-side surface and a convex image sensor-side surface, the third lens may have a negative refractive power and include a convex object-side surface and a concave image sensor-side surface; the fourth lens may have a positive refractive power and include a concave object-side surface and a convex image sensor-side surface, and the fifth lens may have a negative refractive power and include a convex object-side surface and a concave image sensor-side surface.