Compact Zoom Lens Assembly with Bending Unit for Intermediate Focal Length
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Solution Overview
Problem
Existing dual camera systems in compact mobile devices struggle to capture high-resolution images in the intermediate area between wide-angle and telephoto views, and the quality of these images deteriorates as the focal length increases.
Innovation Solution
A wide-angle optical lens assembly with a bending unit and multiple lens groups having negative and positive refractive powers, where the lenses are arranged to reflect light and move for zooming, ensuring each lens's effective diameter is less than the image sensor's diameter, allowing for a compact design and improved image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a dual camera system with wide-angle and telephoto lenses is used in a compact mobile device, then the device can capture zoom images, but the image quality in the intermediate area between wide-angle and telephoto deteriorates
Solution Approach 1:
The zoom lens assembly is divided into multiple lens groups (first lens group with negative refractive power, second lens group with positive refractive power, third lens group with negative refractive power) that can move independently relative to each other. This segmentation allows each lens group to contribute differently to the optical path, enabling high-quality intermediate area capture while maintaining compact form factor.
Solution Approach 2:
The patent implements a dynamic zoom mechanism where the second lens group and third lens group move in the optical axis direction during zooming operations. This dynamic adjustment of lens positions enables continuous focal length variation while maintaining image quality across the entire zoom range, including the intermediate area between wide-angle and telephoto.
2Adaptability or versatility
If the focal length of the telephoto lens is increased to increase the zoom ratio, then the zoom ratio increases, but the image quality of the intermediate area becomes further difficult to obtain
Solution Approach 1:
The zoom lens assembly is divided into multiple lens groups (first lens group with negative refractive power, second lens group with positive refractive power, third lens group with negative refractive power) that can move independently relative to each other. This segmentation allows each lens group to contribute differently to the optical path, enabling high-quality intermediate area capture while maintaining compact form factor.
Solution Approach 2:
The patent changes the refractive power parameters of different lens groups (negative, positive, negative sequence) and adjusts their positions during zooming. By varying the focal lengths and positions of individual lens groups rather than relying on a single long focal length telephoto lens, the system achieves high zoom ratio while maintaining intermediate area image quality.
3Measurement precision
If a general zoom lens is used to obtain high-resolution zoom images, then high-resolution images can be obtained, but the size of the zoom lens assembly becomes relatively large
Solution Approach 1:
The patent employs a nested arrangement where the third lens group is positioned within or adjacent to the second lens group's optical path, and all lens groups are integrated into a compact housing. This nesting allows multiple lens groups to occupy overlapping or adjacent spaces, reducing the overall footprint of the zoom lens assembly while maintaining high-resolution imaging capability.
Solution Approach 2:
The patent utilizes the optical axis dimension efficiently by arranging lens groups in sequence along the optical path rather than spreading them out laterally. The movable lens groups adjust positions along the optical axis during zooming, allowing compact lateral arrangement while achieving extended focal length range through axial movement.
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 a compact mobile device to capture high-resolution zoom images across a wide range of focal lengths without image deterioration, maintaining optical performance and reducing chromatic aberration and astigmatism.
Implementation Method 1
a bending unit configured to reflect light input from the object side in a first direction toward a second direction
Implementation Method 2
a first lens group having negative refractive power, a second lens group having positive refractive power, and a third lens group having negative refractive power
Data Source
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AI summary
Provided are an optical lens assembly and an electronic apparatus having the same. The optical lens assembly having a plurality of lenses arranged from an object side toward an image side where an image sensor is disposed, includes a bending unit configured to reflect light input from the object side in a first direction toward a second direction; and a first lens group having negative refractive power, a second lens group having positive refractive power, and a third lens group having negative refractive power, which are arranged in the second direction in order from the bending unit toward the image side. The first lens group includes a first lens having negative refractive power and disposed adjacent to the bending unit and a second lens having positive refractive power.