Periscopic Zoom Lens With Moving Sensor for Compact Imaging
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Solution Overview
Problem
Existing imaging devices face challenges in efficiently switching between close-range and long-distance shooting without occupying excessive space or increasing costs by using multiple cameras.
Innovation Solution
An imaging module with a zoom lens comprising a first, second, and third lens group, where the second lens group and photosensitive element move along the optical axis to adjust focal length, allowing for variable focal length without multiple cameras, and incorporating a prism assembly for a periscopic structure to reduce device thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple cameras are arranged to enable both close-range and long-distance shooting, then the imaging capability is improved, but the device size and complexity increase
Solution Approach 1:
A single camera module is designed to perform multiple functions by enabling focal length switching between wide-angle and telephoto modes through lens group movement, eliminating the need for separate cameras for different shooting scenarios
Solution Approach 2:
The lens groups are made movable along the optical axis to dynamically change the focal length of the zoom lens, allowing the system to adapt between close-range and long-distance shooting capabilities within a single camera module
2Adaptability or versatility
If multiple cameras are used to achieve zoom shooting, then the focal length switching capability is improved, but the cost increases
Solution Approach 1:
A single camera module is designed to perform multiple functions by enabling focal length switching between wide-angle and telephoto modes through lens group movement, eliminating the need for separate cameras for different shooting scenarios
3Adaptability or versatility
If a traditional zoom lens structure is used, then the focal length adjustment is achieved, but the device thickness increases
Solution Approach 1:
A prism assembly is introduced to redirect the optical path at an angle, allowing the zoom lens to achieve focal length adjustment while maintaining a compact thickness by utilizing the lateral dimension for optical path folding
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 space-saving, cost-effective imaging with improved quality by eliminating the need for multiple cameras and optimizing focal length adjustment, while supporting both close-range and long-distance shooting.
Implementation Method 1
a zoom lens, wherein the zoom lens includes a first lens group, a second lens group, and a third lens group... the second lens group and the photosensitive element are movable in a direction of an optical axis of the zoom lens
Implementation Method 2
incorporating a prism assembly for a periscopic structure to reduce device thickness
Data Source
Figure 1~3a
Figure 3b~4
Figure 5
AI summary
An imaging module (1000), an imaging method, and an electronic device (2000) are provided. The imaging module (1000) includes a zoom lens (100) and a photosensitive element (402). The zoom lens (100) includes a first lens group (10), a second lens group (20), and a third lens group (30). The imaging method include: during switching from a long focus to a short focus, controlling the second lens group (20) and the photosensitive element (402) to move towards an object side; and during switching from the short focus to the long focus, controlling the second lens group (20) and the photosensitive element (402) to move towards an image side.