Six-Lens Optical Layout for Ghost Image Suppression
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Solution Overview
Problem
Existing optical lenses in portable electronic devices suffer from increased complexity, low product yield, and ghost images due to ambient light interference, which complicates imaging quality and processing.
Innovation Solution
An optical lens design with specific lens shapes and focal powers, including a convex object side surface and concave image side surface for the fourth lens, and satisfying expressions like SAG8D0.5/SAG8D1>0.35, reduces ghost image energy by controlling reflection angles below the critical angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the lens structure is complicated to ensure high imaging quality, then imaging quality is improved, but processing difficulty increases and product yield decreases
Solution Approach 1:
The patent applies parameter changes by optimizing the sagittal height ratio (SAG8D0.5/SAG8D1>0.35) of the fourth lens surface to control reflection angles. This specific parameter adjustment reduces ghost image energy while maintaining imaging quality, avoiding the need for more complex lens structures.
Solution Approach 2:
The patent applies local quality by focusing the optimization on a specific local parameter (the fourth lens surface sagittal height ratio) rather than changing the entire lens structure. This localized adjustment achieves ghost image reduction without complicating the overall lens design.
2Measurement precision
If the lens structure is complicated to ensure high imaging quality, then imaging quality is improved, but product yield decreases
Solution Approach 1:
The patent applies parameter changes by optimizing the sagittal height ratio (SAG8D0.5/SAG8D1>0.35) of the fourth lens surface to control reflection angles. This specific parameter adjustment reduces ghost image energy while maintaining imaging quality, avoiding the need for more complex lens structures that would lower product yield.
Solution Approach 2:
The patent applies local quality by focusing the optimization on a specific local parameter (the fourth lens surface sagittal height ratio) rather than changing the entire lens structure. This localized adjustment achieves ghost image reduction without complicating the overall lens design, thereby maintaining high product yield.
3Measurement precision
If ambient light impact is increased to ensure imaging quality, then imaging quality is improved, but ghost images become difficult to eliminate
Solution Approach 1:
The patent applies parameter changes by optimizing the sagittal height ratio (SAG8D0.5/SAG8D1>0.35) of the fourth lens surface to control reflection angles. This specific parameter adjustment reduces ghost image energy while maintaining imaging quality.
Solution Approach 2:
The patent applies the blessing in disguise principle by converting the harmful ambient light reflections into beneficial controlled refractions. By carefully designing the fourth lens surface curvature, the patent makes the reflection angles below the critical angle, transforming potential ghost images into controlled optical paths that improve imaging quality.
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 design effectively reduces ghost image energy and improves imaging quality, enhancing user experience with high-definition imaging and increased product yield.
Implementation Method 1
an optical lens, from an object side to an image side along an optical axis, sequentially includes a stop, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a filter
Implementation Method 2
reduces ghost image energy by controlling reflection angles below the critical angle
Data Source
AI summary
The disclosure provides an optical lens, a camera module and a camera. The optical lens, from an object side to an image side along an optical axis, sequentially includes a stop, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a filter. The optical lens meets the expression of: SAG8D0.5SAG8D1>0.35, where SAG8D0.5 represents a sagittal height at a position corresponding to half a diameter of an image side surface of the fourth lens, and SAG8D1 represents a sagittal height at a position corresponding to the diameter of an image side surface of the fourth lens.