Optical Imaging Lens Assembly with Spacing Elements for Stability
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Solution Overview
Problem
Existing wide-angle lens assemblies face challenges in achieving a thin and light design while maintaining imaging performance and assembling stability, often compromising on field-of-view and optical quality due to large entrance pupil diameters and complex lens structures.
Innovation Solution
The optical imaging lens assembly comprises a five-lens configuration with specific curvature and spacing optimizations, including a lens barrel design with controlled diameters and focal lengths, and the use of spacing elements to improve assembling stability and reduce aberrations, allowing for a minimized height and enhanced field-of-view without compromising optical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wide-angle lens assembly with large entrance pupil diameter is designed to achieve large field-of-view, then the field-of-view is improved, but the lens assembly height increases and manufacturing complexity increases
Solution Approach 1:
The lens assembly is divided into five separate lens elements (first lens E1, second lens E2, third lens E3, fourth lens E4, and fifth lens E5) with specific focal lengths and optical powers. Each lens element contributes to the overall wide-angle imaging function, allowing the system to achieve large field-of-view while controlling the total height through optimized individual element design and spacing.
Solution Approach 2:
The patent optimizes multiple parameters including the focal lengths of individual lenses (e.g., first lens with focal length f1, second lens with focal length f2), the radii of curvature of lens surfaces (e.g., object-side surface radius R1, image-side surface radius R2), and the spacing between lenses (e.g., air spacing T12). These parameter changes enable the lens assembly to achieve wide field-of-view while maintaining compact height.
2Adaptability or versatility
If a wide-angle lens assembly with large entrance pupil diameter is designed to achieve large field-of-view, then the field-of-view is improved, but the manufacturing complexity and assembling stability deteriorate
Solution Approach 1:
The complex wide-angle imaging function is segmented into five manageable lens elements, each with specific optical characteristics. This segmentation simplifies the manufacturing and assembly process compared to a single complex lens, while still achieving the desired large field-of-view performance.
Solution Approach 2:
Each lens element is designed with specific local optical properties (different focal lengths, refractive indices, and surface curvatures) to optimize its contribution to the overall imaging performance. For example, the first lens has positive refractive power with specific surface radii R1 and R2, while the second lens has different characteristics, allowing each component to be manufactured with focused precision.
3Length of stationary object
If the lens assembly height is reduced to achieve thin and light design, then the device portability is improved, but the assembling stability and imaging quality deteriorate
Solution Approach 1:
The lens assembly incorporates air spacing (T12, T23, T34, T45) between adjacent lenses that can be precisely controlled during assembly. This dynamic spacing adjustment allows the compact lens assembly to maintain proper optical alignment and assembling stability despite the reduced overall height, ensuring imaging quality is not compromised.
Solution Approach 2:
The patent optimizes the spacing parameters between lenses (air spacing T12 between first and second lens, T23 between second and third lens, etc.) to achieve the minimum required height while maintaining assembling stability. The specific parameter relationships ensure that the compact design does not sacrifice optical performance or assembly reliability.
4Length of stationary object
If the lens assembly height is reduced to achieve thin and light design, then the device portability is improved, but the imaging quality deteriorates
Solution Approach 1:
The imaging function is segmented across five lens elements, each contributing to the overall image quality. This segmentation allows for optimized light path control at each stage, maintaining high imaging quality even in the compact design. The specific arrangement of positive and negative power lenses corrects aberrations effectively within the reduced height.
Solution Approach 2:
The patent carefully controls multiple parameters including surface radii (R1, R2, R3, R4, R5, R6), focal lengths (f1, f2, f3, f4, f5), and spacing distances (T12, T23, T34, T45) to ensure that the reduced height does not compromise imaging quality. The optimized parameter relationships maintain proper focus and minimize optical aberrations throughout the compact lens assembly.
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 solution achieves a thin and light lens assembly with improved assembling stability and optical quality, ensuring a wide field-of-view and minimizing aberrations, thus meeting the demands for modern electronic devices.
Implementation Method 1
an imaging lens group, composed of a first lens, a second lens, a third lens, a fourth lens and a fifth lens that are sequentially arranged along an optical axis from an object side to an image side
Data Source
AI summary
The present disclosure discloses an optical imaging lens assembly. The optical imaging lens assembly comprises: an imaging lens group, composed of a first lens, a second lens, a third lens, a fourth lens and a fifth lens that are sequentially arranged along an optical axis from an object side to an image side; a fourth spacing elements; and a lens barrel, forming an accommodation space in which the imaging lens group and the fourth spacing elements are accommodated. The lens barrel comprises an object-end surface close to the object side, an image-end surface close to the image side, an inner wall and an outer wall.