Optical Receiving Device Housing Structure Alignment
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Solution Overview
Problem
Conventional optical transceivers for optical fiber cables are bulky, costly, and unstable due to complex structures, making them unsuitable for miniaturization and efficient light transmission/reception, especially in mobile devices where size and alignment precision are critical.
Innovation Solution
The development of optical transmitting and receiving devices with a divided housing structure and a lens group comprising multiple lenses, aligned using a substrate with posts and reference holes, to achieve sub-miniaturization and reduce alignment errors, thereby enhancing manufacturing efficiency and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional optical alignment method is used, then optical transmission function is achieved, but device size becomes large and structure becomes complicated
Solution Approach 1:
The housing is divided into a body and a cover that can be separately assembled. The optical fiber fixing block is integrated into the body, while the lens unit is mounted on the cover. This segmentation allows for simplified manufacturing and assembly while reducing overall device complexity and size.
Solution Approach 2:
The optical fiber fixing block is integrated directly into the housing body, combining the functions of mechanical support and optical fiber positioning. The lens unit is combined with the reflector in a compact arrangement on the cover, reducing the number of separate components needed.
2Volume of moving object
If device size is reduced, then miniaturization is achieved, but alignment precision deteriorates
Solution Approach 1:
The optical fiber is pre-positioned in the fixing block with guide surfaces that establish precise alignment. The lens unit is pre-aligned on the cover before final assembly. This preliminary positioning ensures high alignment precision is maintained even in the miniaturized device structure.
Solution Approach 2:
The housing body and cover serve as intermediary structures that maintain precise spatial relationships between the optical fiber, lens unit, and reflector. The integrated fixing block acts as a mediator to ensure accurate optical fiber positioning relative to the lens system.
3Ease of manufacture
If conventional optical transceiver is used, then optical transmission function is achieved, but manufacturing cost increases
Solution Approach 1:
The divided housing structure allows the body and cover to be manufactured separately using standard molding techniques, reducing manufacturing complexity and cost. The integrated optical fiber fixing block simplifies the bill of materials and assembly process while maintaining structural stability.
Solution Approach 2:
Combining the optical fiber fixing block with the housing body reduces the number of separate components and assembly steps, lowering manufacturing cost. The integrated lens unit and reflector arrangement on the cover further simplifies the structure while maintaining optical performance and reliability.
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 the creation of compact, cost-effective optical devices with improved alignment precision and efficiency in light transmission/reception, suitable for miniaturized applications like smartphones, while maintaining excellent durability and reducing manufacturing costs.
Implementation Method 1
a collimating lens configured to transform diverging light from the optical fiber into parallel light
Implementation Method 2
a reflector arranged above the collimating lens and configured to reflect light from the collimating lens
Implementation Method 3
a focusing lens configured to concentrate the light from the reflector on the optical element
Data Source
AI summary
Embodiments according to the present disclosure relate to an optical transmitting device and an optical receiving device which can minimize the alignment error between the light source and the photodetector on the substrate, miniaturize the devices, and require no separate guide member reducing manufacturing costs, while satisfying the design requirements for sub-miniaturization, and performing optical transmission and reception more efficiently.