Four-Element Optical Imaging Lens for Wide-Field Thermal Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge lies in designing an optical imaging lens that is miniature, maintains good thermal stability, and provides high imaging quality with a large field of view, while addressing issues of manufacturing tolerance and yield, particularly for small glass lens elements.
Innovation Solution
The optical imaging lens is designed with a specific arrangement of four lens elements, including a glass lens element, where each element has convex or concave regions on its surfaces, and satisfies conditional expressions such as HFOV/TTL≥15.000 degrees/mm and 0.500≤|RLGmin|/TG, ensuring compact size, improved manufacturing yield, and enhanced thermal stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If glass lens elements with small size are manufactured using general glass grinding technology, then miniaturization is achieved, but dimensional tolerance becomes too large and manufacturing yield decreases
Solution Approach 1:
The patent applies parameter changes by carefully controlling the ratio of the radius of curvature to thickness (0.500 ≤ |RLGmin|/TG ≤ 2.000) and the position of the glass lens element within the optical system. These parameter optimizations enable small-sized glass lens elements to be manufactured with acceptable dimensional tolerance and improved yield
Solution Approach 2:
The patent assigns different material properties to different lens elements, specifically using glass for the second lens element while other elements may use different materials. This local quality approach allows the glass element to provide thermal stability in a miniaturized system where not all elements can be glass
2Volume of moving object
If the size of glass lens elements is reduced for miniaturization, then the lens becomes smaller, but manufacturing yield decreases due to large dimensional tolerance
Solution Approach 1:
The patent optimizes the ratio of radius of curvature to thickness (0.500 ≤ |RLGmin|/TG ≤ 2.000) for the glass lens element. This parameter change ensures that even with small size, the manufacturing yield is improved by reducing dimensional tolerance variations during the glass grinding process
3Stability of the object's composition
If glass lens elements are used to improve thermal stability, then thermal stability is enhanced, but lens size increases which conflicts with miniaturization requirements
Solution Approach 1:
The patent uses glass material specifically for the second lens element rather than making all lens elements glass. This local quality approach provides thermal stability where most needed while keeping the overall lens size small for miniaturization
Solution Approach 2:
The patent optimizes the ratio of radius of curvature to thickness (0.500 ≤ |RLGmin|/TG ≤ 2.000) for the glass lens element, enabling thermal stability with minimized size
4Reliability
If the optical imaging lens is designed with more lens elements to improve imaging quality, then imaging quality and thermal stability improve, but device complexity and size increase
Solution Approach 1:
The patent divides the optical system into four distinct lens elements with specific surface shape configurations. This segmentation allows each element to contribute to aberration correction and imaging quality while maintaining a compact overall structure
Solution Approach 2:
The patent optimizes the ratio HFOV/TTL (≥15.000 degrees/mm) and the radius of curvature to thickness ratio (0.500 ≤ |RLGmin|/TG ≤ 2.000) to achieve good imaging quality and thermal stability with only four lens elements, avoiding excessive complexity
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 a smaller size with acceptable manufacturing tolerance, maintains good imaging quality, and offers a large field of view, while also providing excellent thermal stability and improved manufacturing yield.
Implementation Method 1
Each of the first to fourth lens elements includes an object-side surface facing the object side and allowing imaging rays to pass through, and an image-side surface facing the image side and allowing the imaging rays to pass through
Data Source
AI summary
An optical imaging lens, sequentially including a first, second, third, and fourth lens elements along an optical axis from an object side to an image side, is provided. Each of the first to fourth lens elements includes an object-side surface facing the object side and allowing imaging rays to pass through, and an image-side surface facing the image side and allowing the imaging rays to pass through. An optical axis region of the object-side surface of the first lens element is convex. The second lens element is a glass lens element. The third lens element has negative refracting power. An optical axis region of the image-side surface of the fourth lens element is convex. Lens elements of the optical imaging lens are only the four lens elements, and the optical imaging lens further satisfies following conditional expressions: HFOV/TTL≥15.000 degrees/mm and 0.500≤|RLGmin|/TG.