Ultra-Wide Lens Assembly With Reduced First-Lens Diameter
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Solution Overview
Problem
Conventional optical systems face challenges in achieving a compact, ultra-wide angle lens structure suitable for small electronic devices, as the effective diameter of the first lens is too large, limiting the reduction of the optical system's size and making it difficult to implement bezel-less designs.
Innovation Solution
A lens assembly comprising five lenses with specific refractive powers and configurations, including a first lens with negative power and smaller effective diameter, a second lens with positive power, and a fifth lens with negative power, aligned along an optical axis, along with an aperture between the first and second lenses, to achieve a compact and ultra-wide angle view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional optical systems are used to achieve ultra-wide angle, then field of view is improved, but effective diameter of the first lens becomes too large
Solution Approach 1:
The optical system is divided into multiple lens groups (first lens group with negative power, second lens group with positive power, third lens group with negative power) that work together to achieve ultra-wide angle. This segmentation allows each group to contribute differently to the overall field of view while keeping individual lens diameters manageable.
Solution Approach 2:
The patent applies specific parameter constraints including conditional equations (0.21 < L1_ape/ImagH < 0.4 and 100 < FOV < 140) to optimize the ratio of effective diameter to image height and control the field of view. By carefully controlling these parameters, the system achieves ultra-wide angle without requiring excessively large lens diameters.
2Manufacturing precision
If more lenses are added to reduce aberration and improve resolution, then image quality is improved, but device complexity increases
Solution Approach 1:
Each lens group is assigned specific refractive power characteristics (negative, positive, negative) to address different aspects of optical performance. The first lens group corrects certain aberrations, the second group provides positive power, and the third group corrects other aberrations, creating localized optimization throughout the system.
Solution Approach 2:
Multiple lens groups are combined in a compact arrangement along the optical axis to achieve both ultra-wide angle and high image quality. The merging of these groups with different refractive powers allows the system to correct various types of aberrations simultaneously while maintaining a relatively simple overall structure.
3Area of stationary object
If lens effective diameter is reduced for compact design, then device size is reduced, but optical performance deteriorates
Solution Approach 1:
The patent transitions from relying on a single large lens to using multiple smaller lens groups arranged along the optical axis. This dimensional redistribution allows the system to maintain compact lens diameters while achieving the required optical performance through the collective action of multiple groups.
Solution Approach 2:
By controlling the ratio L1_ape/ImagH within the range of 0.21 to 0.4, the patent optimizes the relationship between lens effective diameter and image height to maintain adequate optical performance while keeping the lens compact. This parameter control ensures that light gathering capability and resolution are preserved despite the reduced diameter.
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 enables a compact and bezel-less design in electronic devices, providing high-resolution images and videos with a field of view of 100 to 140 degrees, while effectively correcting aberrations and maintaining optical performance.
Implementation Method 1
a lens assembly including a plurality of lenses aligned along an optical axis direction from an object side to an image side, wherein the plurality of lenses including, a first lens having a negative refractive power; a second lens having a positive refractive power
Data Source
AI summary
According to an embodiments of the disclosure, electronic device comprise: a lens assembly including a plurality of lenses aligned along an optical axis direction from an object side to an image side and including a first lens having a convex surface in a first direction parallel to the optical axis direction and toward the object; a second lens having a convex lens in the first direction; a third lens having a positive refractive power; a fifth lens having a positive refractive power; and a sixth lens; and an image sensor including an imaging plane configured to form an image. The electronic device may be implemented as a compact and high-resolution optical device. The lens assembly may be diversified according to embodiments, and other various lens assemblies and electronic devices with the same may be provided, according to various embodiments.