Lens Assembly with Protruding First Lens for Wide Angle
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Solution Overview
Problem
Conventional front camera lens assemblies have limited view angles, are thick, and occupy significant space due to the design of the first lens being entirely surrounded by the lens body, which restricts their performance in electronic devices like mobile phones.
Innovation Solution
The lens assembly design includes a first lens with a protruded middle portion and varying diameters, a minor diameter portion close to the object side, and a major diameter portion close to the image side, optimized to reduce total lens length, volume, and thickness while increasing the view angle, maintaining good optical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the first lens is entirely surrounded by the lens body, then the lens structure is compact and supported, but the view angle is limited and the thickness increases
Solution Approach 1:
The first lens is extracted from the enclosed lens body structure and positioned to protrude from the object side surface. This allows the lens to be supported by the lens body while extending outward, increasing the view angle and reducing thickness without compromising support stability
Solution Approach 2:
The lens configuration transitions from a fully enclosed 3D structure to a partially external arrangement where the first lens protrudes from the lens body. This dimensional change enables improved optical performance while maintaining structural support
2Reliability
If the first lens is entirely surrounded by the lens body, then the lens is well-supported, but the device thickness increases
Solution Approach 1:
The first lens is extracted from the enclosed lens body structure and positioned to protrude from the object side surface. This allows the lens to be supported by the lens body while extending outward, increasing the view angle and reducing thickness without compromising support stability
3Stability of the object's composition
If the first lens occupies much space in the lens body, then the lens structure is stable, but the view angle is limited
Solution Approach 1:
The first lens is extracted from the enclosed lens body structure and positioned to protrude from the object side surface. This allows the lens to be supported by the lens body while extending outward, increasing the view angle and reducing thickness without compromising support stability
Solution Approach 2:
The lens configuration transitions from a fully enclosed 3D structure to a partially external arrangement where the first lens protrudes from the lens body. This dimensional change enables improved optical performance while maintaining structural support
4Reliability
If the first lens has a large diameter, then the optical performance is improved, but the lens volume and thickness increase
Solution Approach 1:
The first lens has different diameter sections: a larger diameter portion for optimal optical performance and a smaller diameter portion that protrudes from the lens body. This local variation in diameter allows improved optics while reducing overall lens volume and thickness
Solution Approach 2:
The first lens is divided into different diameter sections, with the smaller diameter portion protruding from the lens body. This segmentation enables the lens to achieve good optical performance with reduced volume and thickness
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 a decreased thickness, increased view angle, and improved optical performance by optimizing the lens layout and dimensions, making it suitable for applications in mobile devices with full screen displays.
Implementation Method 1
The first lens includes an object side surface and an image side surface, the object side surface is protruded along the optical axis, the first lens in a cross section is higher at a middle than at both sides so that the first lens is protruded at the middle towards the object side to form a pillar
Data Source
AI summary
A lens assembly includes a lens body, a first lens, a second lens, a third lens and a fourth lens, wherein the lens body includes a lens barrel, and the first lens, the second lens, the third lens and the fourth lens are fixed in the lens body in order from an object side to an image side along an optical axis. The first lens is closest to the object side and includes an object side surface, the object side surface is protruded along the optical axis, the first lens further includes a first portion close to the object side and a second portion close to the image side, and a diameter of the first portion is smaller than a diameter of the second portion so that a step is formed between the first portion and the second portion.