Folded Optical Path Lens Groups for Compact Camera Modules
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Solution Overview
Problem
Existing camera modules face challenges in achieving high image quality and compact size due to the complexity and size increase when using multiple lenses, which affects autofocus and zoom functions, leading to increased energy consumption and device thickness.
Innovation Solution
The optical system comprises a sequence of three lens groups with opposite refractive powers, allowing for minimized movement of lens groups to control effective focal length, reducing power consumption and maintaining image quality, and incorporating a non-circular lens shape for improved performance and compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple lenses are included to achieve high image quality and resolution, then optical performance is improved, but the length and height of the optical system increase
Solution Approach 1:
The patent implements a folded optical path where the third lens group is positioned between the first and second lens groups in the optical path sequence, creating a nested arrangement that reduces the overall length and height of the optical system while maintaining multiple lens elements for high image quality
Solution Approach 2:
The patent introduces a folded optical path that changes the spatial arrangement from a linear sequence to a multi-dimensional configuration, allowing the optical system to achieve high resolution with reduced overall dimensions by utilizing three-dimensional space more efficiently
2Manufacturing precision
If multiple lenses are included to achieve high image quality and resolution, then optical performance is improved, but the overall thickness and size of devices increase
Solution Approach 1:
The patent implements a folded optical path where the third lens group is positioned between the first and second lens groups in the optical path sequence, creating a nested arrangement that reduces the overall length and height of the optical system while maintaining multiple lens elements for high image quality
Solution Approach 2:
The patent introduces a folded optical path that changes the spatial arrangement from a linear sequence to a multi-dimensional configuration, allowing the optical system to achieve high resolution with reduced overall dimensions by utilizing three-dimensional space more efficiently
3Adaptability or versatility
If lens or lens group position is controlled to perform zoom and autofocus functions, then functionality is improved, but the amount of movement increases exponentially
Solution Approach 1:
The patent makes the third lens group movable relative to the first and second lens groups, enabling the system to dynamically adjust focus and zoom by changing the position of the third lens group, which reduces the movement distance required compared to moving entire lens assemblies
Solution Approach 2:
The patent divides the optical system into three distinct lens groups that can be independently positioned and controlled, allowing selective movement of individual groups to achieve zoom and autofocus functions with reduced overall movement distance
4Manufacturing precision
If multiple lenses are included to achieve high image quality and resolution, then optical performance is improved, but device complexity increases
Solution Approach 1:
The patent divides the optical system into three distinct lens groups that can be independently positioned and controlled, allowing selective movement of individual groups to achieve zoom and autofocus functions with reduced overall movement distance
Solution Approach 2:
The patent designs the third lens group to serve multiple functions including focusing, zooming, and optical path folding, reducing the need for separate dedicated components for each function and thereby simplifying the overall device architecture
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 enables efficient autofocus across various distances with minimized peripheral image quality deterioration, reduced power consumption, and a slimmer device structure, while allowing for a more compact and high-performance camera module design.
Implementation Method 1
an imaging lens that forms an image and an image sensor that converts the formed image into an electrical signal
Data Source
AI summary
The optical system according to the embodiment includes a first lens group, a second lens group, and a third lens group sequentially arranged along an optical axis from an object side to an image side and wherein each of the first to third lens groups including at least one lens; wherein a refractive power sign of the first lens group and a refractive power sign of the second lens group are opposite to each other, and wherein the first lens group, the second lens group, and the third lens group satisfy Equation 1 below.0.6<<semantics definitionURL="">❘<annotation encoding="Mathematica">"\[LeftBracketingBar]"</annotation></semantics>f_1/f_23<semantics definitionURL="">❘<annotation encoding="Mathematica">"\[RightBracketingBar]"</annotation></semantics><1.4[Equation 1](In Equation 1, f_1 is a focal length of the first lens group, f_23 is a combined focal length of the second lens group and the third lens group.)