Lens Device With Folded Light Path Turning Module
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Solution Overview
Problem
Conventional lens devices face challenges in achieving high zoom ratios while maintaining miniaturization and effective image forming performance, particularly in limited spaces, due to constraints in volume and optical path length.
Innovation Solution
The lens device incorporates a light path turning module that reflects light at least twice, allowing for a longer effective focal length and back focal length within a compact design, utilizing a combination of lenses with specific refractive powers and arrangements to optimize optical performance and space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a periscope lens device uses traditional straight light path arrangement, then the device can achieve simple structure, but the device volume becomes large and zoom ratio is limited
Solution Approach 1:
The patent introduces a light path turning module that deflects light at least twice, changing the light propagation direction from a straight line to a folded path. This dimensional change in light trajectory allows the optical system to achieve a longer effective focal length within a compact device volume, resolving the contradiction between simple structure and small volume.
2Volume of moving object
If the lens device is miniaturized to reduce volume, then the device becomes compact, but the effective focal length and back focal length are reduced
Solution Approach 1:
By implementing a folded light path through the light path turning module, the patent effectively extends the optical path length in a compact physical space. The light travels a longer distance through the lens system by changing direction, thereby achieving a longer effective focal length without increasing the device volume.
Solution Approach 2:
The light path turning module is integrated within the compact lens device structure, with the deflected light path nested within the device body. This nesting allows the optical system to accommodate a longer effective focal length within the miniaturized device envelope by folding the light path inside the device boundaries.
3Adaptability or versatility
If the light path is extended to achieve high zoom ratio, then the zoom capability is improved, but the device volume increases
Solution Approach 1:
The patent achieves high zoom ratio by folding the light path through the light path turning module, which allows the optical system to extend the effective focal length in a non-linear manner. The light travels through a longer optical path by changing direction, enabling high zoom capability within a compact device volume without requiring a physically extended structure.
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 high-level long focus capabilities with reduced volume, supporting auto focus and optical image stabilization, while meeting the requirements of image forming in a compact optical lens device, thereby enhancing space utilization and optical performance.
Implementation Method 1
The light path turning module is disposed between the lens module and the image forming unit. The light exiting from the lens module is reflected at least twice by the light path turning module.
Data Source
AI summary
A lens device includes a lens module, an image forming unit and a light path turning module. The lens module includes one or plural lenses. The light path turning module is disposed between the lens module and the image forming unit. The light exiting from the lens module is reflected at least twice by the light path turning module.