Optical Imaging Lens Assembly Miniaturization
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Solution Overview
Problem
The challenge is to develop an optical imaging lens assembly that balances miniaturization with high imaging performance for smart electronic devices, particularly in full-screen displays, where traditional designs face contradictions between size reduction and performance optimization.
Innovation Solution
The optical imaging lens assembly includes a window member followed by a first lens with positive refractive power and a second lens with negative refractive power, optimized for an entrance pupil diameter and effective aperture ratio, along with specific focal length and curvature relationships to enhance imaging performance while minimizing size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the optical imaging lens assembly is miniaturized to reduce screen opening size, then the device size is reduced, but the imaging performance deteriorates
Solution Approach 1:
The patent applies parameter changes by optimizing the ratio of entrance pupil diameter to effective aperture (EPD/DTg > 1.6) and controlling focal length ratios between lenses. By changing these optical parameters, the system achieves high imaging performance in a miniaturized form factor, resolving the contradiction between small size and image quality
Solution Approach 2:
The optical system is segmented into multiple lenses with different refractive powers (positive and negative). This segmentation allows each lens to contribute differently to the overall imaging performance, enabling compact design while maintaining high image quality through distributed optical functions
2Illumination intensity
If the entrance pupil diameter is increased to improve luminance, then the imaging quality is improved, but the screen opening size increases
Solution Approach 1:
The patent changes the parameter relationship by establishing EPD/DTg > 1.6, which allows the entrance pupil diameter to be sufficiently large for good luminance while the effective aperture is optimized to control the overall size. This parameter optimization resolves the contradiction between luminance and device size
3Manufacturing precision
If the focal length is optimized to improve field-of-view, then the imaging performance is improved, but the optical path length increases
Solution Approach 1:
The optical system uses segmented lenses with different focal lengths (positive and negative powers). This segmentation allows the field-of-view to be expanded through the combined effect of multiple lenses while keeping each individual lens and the overall optical path length compact
Solution Approach 2:
The patent uses dimensionality change by arranging lenses in a compact multi-element configuration that achieves a wide field-of-view (0.7 ≤ ImgH/f < 1.1) without proportionally increasing the optical path length. The system transitions from a simple single-lens approach to a multi-dimensional lens arrangement that optimizes field coverage while controlling length
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
This configuration ensures high imaging quality with sufficient luminance and a larger field-of-view, reducing spherical and chromatic aberrations, and maintaining a small screen opening size, thus addressing the contradiction between miniaturization and performance.
Implementation Method 1
a first lens having a positive refractive power, and an object-side surface of the first lens being a convex surface; a second lens having a negative refractive power
Data Source
AI summary
The present disclosure provides an optical imaging lens assembly and an electronic device. The optical imaging lens assembly includes, sequentially from an object side to an image side along an optical axis, a window member; a first lens having a positive refractive power, and an object-side surface of the first lens being a convex surface; a second lens having a negative refractive power; and at least one subsequent lens having a refractive power, wherein an entrance pupil diameter EPD of the optical imaging lens assembly and half of an effective aperture DTg of the window member at an object-side surface thereof satisfy: EPD/DTg>1.6, which makes the optical imaging lens assembly have the characteristics of high resolution and miniaturization. When the optical imaging lens assembly is installed on an electronic device, it can minimize the impact on the full-screen display.