Six-Element Imaging Lens Assembly With Inflection-Point Optics
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Solution Overview
Problem
Conventional optical lens assemblies struggle to balance image quality, sensitivity, aperture size, volume, and field of view, making it difficult to meet the diverse requirements of modern electronic devices with enhanced image sensors.
Innovation Solution
An imaging optical lens assembly comprising six lens elements, each with specific refractive powers and surface shapes, including convex and concave surfaces, inflection points, and a light path folding element, optimized by conditions such as axial distances and focal lengths to achieve balanced performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional optical lens assembly is used, then the structure is simple, but it is hard to balance image quality, sensitivity, aperture size, volume and field of view
Solution Approach 1:
The optical lens assembly is divided into six separate lens elements (first lens element, second lens element, third lens element, fourth lens element, fifth lens element, and sixth lens element) arranged in sequence along the optical path. Each lens element has specific refractive power and surface shape characteristics that contribute to balancing image quality, sensitivity, aperture size, volume and field of view. This segmentation allows independent optimization of each lens element's properties to achieve overall system balance.
Solution Approach 2:
Different regions of the lens assembly have different optical properties. The first lens element has a convex object-side surface for light entry, the second lens element has positive refractive power, the third lens element has a concave image-side surface, the fourth lens element has both convex and concave surfaces, and the fifth and sixth lens elements complete the optical path. Each lens element is designed with specific local optical characteristics to contribute to the overall balance of performance parameters.
2Volume of moving object
If the pixel size is reduced to enhance image sensor performance, then the imaging apparatus becomes more compact, but optical lens assemblies with high image quality become harder to achieve
Solution Approach 1:
The optical lens assembly utilizes inflection points in the optical effective area of lens elements (second lens element to sixth lens element) to control light paths in three-dimensional space. This allows the lens assembly to achieve high image quality with compact dimensions by optimizing the spatial distribution of refractive power and surface shapes across multiple dimensions rather than relying on a single lens element.
3Use of energy by moving object
If the aperture size is increased to improve sensitivity, then light gathering ability enhances, but the volume and field of view are compromised
Solution Approach 1:
The optical lens assembly is designed with movable lens elements that can adjust their positions along the optical path. This dynamic configuration allows the system to optimize the balance between aperture size, volume and field of view for different imaging conditions. The axial distances between lens elements (T34, T45, T56) and the focal length (f) can be adjusted to achieve optimal performance for varying lighting conditions and imaging requirements.
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 enhances image quality, reduces aberrations, and optimizes volume and field of view, allowing for compact designs suitable for various electronic devices.
Implementation Method 1
Each of the sixth lens elements has an object-side surface towards the object side and an image-side surface towards the image side... the second lens element has positive refractive power... the image-side surface of the third lens element is concave in a paraxial region thereof
Data Source
AI summary
An imaging optical lens assembly includes six lens elements, the six lens elements being, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. Each of the sixth lens elements has an object-side surface towards the object side and an image-side surface towards the image side. The object-side surface of the first lens element is convex in a paraxial region thereof. The object-side surface of the fourth lens element is convex in a paraxial region thereof, the image-side surface of the fourth lens element is concave in a paraxial region thereof. At least one of the second lens element to the sixth lens element includes at least one inflection point in an optical effective area thereof.