Seventh Lens Rib Surface Treatment for Flare Suppression
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Solution Overview
Problem
The challenge is to design an optical imaging system for mobile communications terminals that achieves high resolution while minimizing the space required for multiple lenses, which is difficult due to the miniaturization of these devices.
Innovation Solution
The optical imaging system consists of seven lenses sequentially disposed along an optical axis, with the seventh lens featuring an optical portion for refracting light and a rib for support. The rib has surface-treated and non-treated areas to enhance light scattering and prevent flare phenomena.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of lenses is increased to achieve high resolution, then imaging quality is improved, but the space required for the camera module increases
Solution Approach 1:
The patent applies nesting by placing the optical imaging system inside a lens barrel, and further nesting the multiple lenses (first through seventh lenses) in sequence within the limited space of the lens barrel. The rib structure of the seventh lens provides additional nesting support by receiving the sixth lens, maximizing space utilization while maintaining seven lenses for high resolution imaging
2Area of stationary object
If multiple lenses are arranged in limited space, then device miniaturization is achieved, but aberration correction becomes difficult
Solution Approach 1:
The patent applies local quality by giving each lens specific refractive power characteristics (positive or negative) and specific surface curvatures (convex or concave object-side and image-side surfaces) to correct different types of aberrations. The seventh lens specifically has a rib structure with surface-treated and non-treated areas to locally control light reflection and scattering, improving image quality in specific regions
3Object-affected harmful factors
If surface treatment is applied to the rib to scatter light, then flare phenomena are suppressed, but manufacturing complexity increases
Solution Approach 1:
The rib structure applies local quality by having surface-treated areas (with rougher surface) and non-treated areas (with smoother surface) in specific locations. The surface-treated areas scatter unintended reflected light to suppress flare, while non-treated areas maintain smoother surfaces, optimizing both flare suppression and manufacturing feasibility through selective treatment
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 allows for effective aberration correction, enabling high-resolution imaging within a limited space, and suppresses flare phenomena by scattering unintended reflections.
Implementation Method 1
the seventh lens includes an optical portion configured to refract light
Implementation Method 2
The rib includes a surface-treated area disposed in a first portion of an object-side surface of the rib and a first portion of an image-side surface of the rib... the surface-treated area is rougher than the first non-treated area and the second non-treated area
Data Source
AI summary
An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens sequentially disposed in numerical order along an optical axis from an object side toward an imaging plane, wherein the seventh lens includes an optical portion configured to refract light, and a rib surrounding the optical portion; the rib includes a surface-treated area disposed in a first portion of an object-side surface of the rib and a first portion of an image-side surface of the rib, a first non-treated area disposed in a second portion of the object-side surface of the rib, and a second non-treated area disposed in a second portion of the image-side surface of the rib; and the first non-treated area and the second non-treated area overlap each other when viewed in a direction of the optical axis.