Rotatable Fresnel Lens for Low-Loss Light-Angle Adjustment
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Solution Overview
Problem
Existing lighting technologies face issues with luminous flux loss and inefficient space utilization in adjusting light angles, particularly in single, double, and rotating lens systems.
Innovation Solution
An angularly adjustable Fresnel turning lens with a lens body featuring convex and concave cambered surfaces and multiple convex surfaces, allowing angle adjustment by turning the lens body, reducing material and weight, and minimizing luminous flux loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If angle adjustment is achieved by adjusting the distance from the light source to the lens, then the light-emitting angle changes, but optical efficiency is lost due to focal length changes
Solution Approach 1:
The lens is divided into multiple independent convex surfaces (first, second, third convex surfaces) with different light-emitting angles, allowing selective use of appropriate segments based on lighting needs without changing focal length, thus avoiding luminous flux loss
Solution Approach 2:
The lens structure is made rotatable around the light source, enabling dynamic switching between different convex surfaces to achieve angle adjustment while maintaining constant focal length and optical efficiency
2Adaptability or versatility
If angle adjustment is achieved by adjusting relative positions of two layers of lenses, then the light path changes, but luminous flux loss increases due to passing through two layers of optical structures
Solution Approach 1:
The invention extracts the angle adjustment function from complex multi-layer lens systems and implements it through a single lens with multiple convex surfaces, eliminating the need for light to pass through multiple optical layers and reducing luminous flux loss
3Adaptability or versatility
If angle adjustment is achieved by rotating a lens with free-form surface stretching, then angular transformation is realized, but optical surface utilization is low and space efficiency decreases
Solution Approach 1:
A single lens body incorporates multiple convex surfaces that can each serve as the light-emitting surface, making the lens multi-functional for different angles. This improves optical surface utilization and reduces the need for multiple separate lenses, thereby reducing overall volume and weight
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 achieves efficient angle adjustment with reduced material and weight, minimizing luminous flux loss and improving space utilization by using a single optical structure.
Implementation Method 1
a convex cambered surface is provided at a middle position of the surface A, and a third convex surface, a second convex surface, and a first convex surface are provided successively at an outer side of the convex cambered surface; a concave cambered surface is arranged at a middle position of the surface B
Implementation Method 2
An angularly adjustable Fresnel turning lens with a lens body featuring convex and concave cambered surfaces and multiple convex surfaces
Data Source
AI summary
Disclosed is an angularly adjustable Fresnel turning lens, including a lens body, where one side surface of the lens body is a surface A, and the other side surface of the lens body is a surface B, where a convex cambered surface is provided at a middle position of the surface A, and a third convex surface, a second convex surface, and a first convex surface are provided successively at an outer side of the convex cambered surface; a concave cambered surface is arranged at a middle position of the surface B. An implementation method of the angularly adjustable Fresnel turning lens is also disclosed. In the present disclosure, a light-emitting angle may be adjusted only by turning the lens body, and compared with the focusing mode in the related art, this lens has the features of a smaller amount of material and a smaller weight and volume, thereby reducing the cost of the lens. The loss of optical efficiency caused by the conventional focusing mode is avoided, and meanwhile, only one layer of optical structure is provided, thereby reducing the loss of luminous flux. The angle adjustment is realized by turning, thereby improving the space utilization.