Optical Imaging Lens Assembly with Spherical Mirror Surface
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Solution Overview
Problem
Conventional mobile phone lenses struggle to simultaneously achieve a great depth of field for long shots and close-ups, making it difficult to meet the diverse shooting requirements while maintaining a compact and high-quality imaging system.
Innovation Solution
An optical imaging lens assembly comprising multiple lenses with specific refractive powers, surface types, and configurations, including a glass lens with a spherical mirror surface and aspheric mirror surfaces, along with a variable diaphragm, to achieve a compact structure and high imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional mobile phone lenses are used, then the device size is compact, but the lens cannot simultaneously achieve great depth of field for long shots and close-up layering
Solution Approach 1:
The lens assembly is divided into multiple lens elements (at least 6 lenses) with different refractive powers and surface characteristics. Each lens element contributes differently to the overall optical performance, enabling the system to achieve both long shot depth of field and close-up layering effects through coordinated action of segmented components
Solution Approach 2:
The lens assembly incorporates a variable diaphragm that can dynamically adjust the aperture size. This dynamic adjustment capability allows the lens to adapt to different shooting scenes by changing the aperture, thereby achieving both great depth of field for long shots and close-up layering effects with a single versatile lens system
2Reliability
If multiple lenses with complex configurations are used to achieve high imaging quality, then imaging performance improves, but the lens assembly size increases
Solution Approach 1:
The lens assembly incorporates aspheric surfaces on one or more lens elements. These aspheric surfaces enable more efficient light control and aberration correction compared to traditional spherical surfaces, allowing high imaging quality to be achieved with a more compact lens configuration that reduces overall assembly volume
Solution Approach 2:
The patent employs lenses with varying refractive powers (positive and negative) and different surface curvatures. By optimizing these optical parameters across multiple lens elements, the system achieves high imaging quality while maintaining a compact form factor suitable for mobile devices
3Illumination intensity
If aperture is enlarged to improve light gathering, then imaging quality in low light improves, but aberrations increase
Solution Approach 1:
Different lens elements in the assembly have specifically designed surface characteristics (spherical, aspheric, convex, concave) that are optimized for their local function. This local optimization of quality across different parts of the optical system enables the lens to maintain low aberrations even when the aperture is enlarged for improved light gathering
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 enables the lens assembly to maintain high imaging performance under both large and small apertures, reducing aberrations and achieving a compact, ultra-thin design suitable for portable electronic devices.
Implementation Method 1
The image-side surface of the first lens is a spherical mirror surface
Implementation Method 2
an object-side surface of the second lens to an image-side surface of the seventh lens includes at least one aspheric mirror surface
Implementation Method 3
an object-side surface of the second lens to an image-side surface of the seventh lens includes at least one aspheric mirror surface
Data Source
AI summary
The disclosure provides an optical imaging lens assembly, which sequentially includes from an object side to an image side along an optical axis: a first lens with a positive refractive power, an object-side surface thereof is a convex surface, and an image-side surface thereof is a flat surface; a variable diaphragm; a second lens with a negative refractive power; a third lens with a refractive power; a fourth lens with a positive refractive power, an image-side surface thereof is a convex surface; a fifth lens with a refractive power; a sixth lens with a positive refractive power; and a seventh lens with a negative refractive power. The first lens is a glass lens. The image-side surface of the first lens is a spherical mirror surface.