Optical Coupling Device with Light Passing Part for Short-Range Communication
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Solution Overview
Problem
In optical communication systems, laminated light receiving and surface light emitting devices result in poor light receiving efficiency and communication quality due to the entry of optical signals into both devices, leading to unsuitable performance for short distance communications.
Innovation Solution
An optical coupling device is designed with a light receiving and emitting device configuration where the light receiver has a light passing part on the optical axis, and an optical device that refracts incident light around the axis to enter the receiver, reducing entry into the emitter and enhancing collection efficiency, using lenses with first and second curve surfaces or Fresnel lenses to direct light into a ring shape for efficient reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the light receiver and surface light emitting device are laminated to downsize the communication module, then the module size is reduced, but the light receiving efficiency deteriorates because incident light enters both devices
Solution Approach 1:
The light receiver is divided into two functional regions: a light receiving region that receives incident light and a light passing part that allows outgoing light to pass through. This segmentation enables the light receiver to selectively process different light paths, improving light receiving efficiency while maintaining the compact laminated structure.
Solution Approach 2:
The optical device acts as an intermediary between the incident light and the light receiver. It refracts the incident light around the optical axis to enter the light receiving region while preventing it from entering the light emitter, thereby resolving the contradiction between compact size and light receiving efficiency.
2Device complexity
If the light passing part is positioned on the optical axis to allow outgoing light to pass through, then the transmission path is simplified, but incident light around the optical axis cannot be effectively directed into the light receiver
Solution Approach 1:
The optical device introduces local quality variation by refracting light differently at different positions. It specifically refracts incident light around the optical axis to enter the light receiving region, while allowing the light passing part on the optical axis to remain simple for outgoing light transmission. This localized optical manipulation resolves the contradiction between structural simplicity and light receiving efficiency.
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 significantly improves light receiving efficiency and communication quality by minimizing light entry into the emitter and maximizing it into the receiver, making the optical coupling device suitable for short distance optical communication.
Implementation Method 1
The optical device causes incident light around the optical axis of the incident light to be refracted so as to be apart from the optical axis and to enter the light receiver
Implementation Method 2
The optical device may include a lens having a first curve surface that causes incident light around the optical axis of the incident light to be refracted so as to be apart from the optical axis and to enter the light receiver and a second curve surface that causes another light of the incident light to be refracted so as to be close to the optical axis
Implementation Method 3
The optical device may be a Fresnel lens
Data Source
AI summary
[Object] To provide an optical coupling device that efficiently receives an optical signal from an optical fiber and has improved communication quality, and an optical communication system using the same. [Solving Means] An optical coupling device according to the present technology includes a light receiving and emitting device and an optical device. The light receiving and emitting device includes a light emitter that emits outgoing light, and a light receiver that receives incident light from outside. The light receiver has a light passing part through which the outgoing light passes. The light passing part is arranged on an optical axis of the incident light. The optical device causes incident light around the optical axis of the incident light to be refracted so as to be apart from the optical axis and to enter the light receiver.