Internal-Reflective Telecentric Lens System for Compact Imaging
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Solution Overview
Problem
Conventional telecentric lens systems occupy a large space, limiting their use in portable devices such as mobile phones and tablets due to the need for a relatively large size.
Innovation Solution
An internal-reflective telecentric lens system is designed by incorporating a reflector within the lens system, which shortens the light path and reduces the overall size, allowing for compact integration in devices with thickness constraints. This system includes a first lens assembly, a reflector, and a second lens assembly, where the reflector is positioned between the first and second lens assemblies to reflect light beams, enabling a compact form factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a conventional telecentric lens system is used, then the imaging function is provided, but the system occupies a relatively large space
Solution Approach 1:
The patent introduces a reflector to fold the light path, changing the linear optical path into a folded configuration. This dimensional transformation allows the light to travel a longer effective distance within a shorter physical space, thereby reducing the overall size of the telecentric lens system while maintaining its imaging function.
Solution Approach 2:
The reflector is disposed inside the telecentric lens system, nesting the folding mechanism within the existing optical structure. This internal placement of the reflector allows the light path to be folded within the confines of the lens system itself, further compacting the overall design without adding external bulk.
2Length of moving object
If the light path is shortened to reduce system size, then the system becomes compact, but the positional relationship between components must be precisely controlled
Solution Approach 1:
The reflector serves as an intermediary component that mediates between the object plane and the image plane by folding the light path. This intermediary element allows for precise control of the light trajectory while maintaining a compact overall structure, as the reflector's position and angle can be optimized to achieve the desired light path folding with minimal disruption to other components.
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 internal-reflective telecentric lens system effectively reduces the height of the telecentric lens system, enabling its use in devices like mobile phones with thickness requirements, while allowing for adjustable focusing without altering the positional relationship between the object plane and the first lens assembly, thus facilitating compact and functional integration.
Implementation Method 1
The reflector is configured to reflect the light beams towards the second lens assembly
Data Source
AI summary
An internal-reflective telecentric lens system includes a first lens assembly, a reflector, and a second lens assembly. The first lens assembly includes a first lens. The second lens assembly includes a second lens, a third lens, and a fourth lens, that are disposed in sequence along a light path. The first lens assembly is configured to receive and output one or more light beams towards the reflector. The reflector is configured to reflect the light beams towards the second lens assembly. The second lens assembly is configured to receive and converge the light beams reflected by the reflector at a diaphragm between the second lens and the third lens, and transmit the light beams past the diaphragm through the third and the fourth lenses for imaging.