VCSEL Optical Data Bus Alignment and Shielding
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Solution Overview
Problem
Existing wireless optical transmission systems require complex adjustments and significant mechanical effort for alignment and locking, leading to increased structural complexity and space requirements, making them unsuitable for integration into modular devices.
Innovation Solution
A wireless optical data bus system utilizing a VCSEL laser diode with integrated lenses for beam expansion and bundling, along with a metal housing for shielding, enables easy alignment and stable transmission without additional adjustment effort, allowing for bidirectional high-speed data transfer with improved electromagnetic compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional adjustment devices with mechanical components are used for alignment, then alignment accuracy is improved, but device complexity and space requirements increase
Solution Approach 1:
The patent replaces complex mechanical adjustment devices with an optical alignment method using a alignment mark and optical detector. Instead of mechanical components for precise positioning, the system uses optical means to detect and establish the transmission path, thereby reducing mechanical complexity while maintaining alignment accuracy.
Solution Approach 2:
The patent introduces an alignment mark that copies the optical axis information onto a visible pattern. This alignment mark serves as an optical copy of the precise alignment requirement, allowing visual or optical detection without needing complex mechanical measurement devices.
2Stability of the object's composition
If locking devices are added to maintain stable transmission path, then transmission stability is improved, but device complexity and space requirements increase
Solution Approach 1:
The patent replaces mechanical locking devices with an optical feedback control system. Instead of mechanical locks to maintain position, the system uses optical detection of the transmission path and control signals to maintain stability, reducing mechanical components while ensuring stable operation.
3Ease of operation
If VCSEL laser diode with integrated lenses is used, then ease of alignment is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent merges the laser diode and optical lenses into a single integrated transmitter component. This integration eliminates the need for separate alignment between multiple components, as the combined unit maintains fixed geometric relationships, thereby simplifying alignment while requiring precision in the integration manufacturing process.
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 system achieves high data rates of at least 16 Mbit/s with simplified module layout and structure, reduced electromagnetic interference, and easy integration into modular devices due to its compact and stable design.
Implementation Method 1
A VCSEL (Vertical Cavity Surface Emitting Laser) laser diode, which emits coherent light beams perpendicular to a defined plane
Implementation Method 2
a lens for expanding the emitted laser beam is integrated within the transmitter, so that the emitted laser beam experiences a defined divergence
Implementation Method 3
a lens for bundling the received laser beam is integrated within the receiver, so that it is ensured that the intensity of the received laser beam at the photo element is sufficient
Implementation Method 4
a photo element, in particular a photo diode, aligned with the laser beam emitted by the laser diode is provided in the receiver
Data Source
Figure 1~2
Figure 3
AI summary
The present invention relates to an optical data bus (1) for wire-free signal transmission between two modules (2, 3) of an appliance. The modules (2, 3) of the appliance, in particular of a radio, are each equipped with a transmitter (5) and a receiver (6), and are each equipped with a processor (7), with the transmitter (5) being a laser diode (40) and with the receiver (6) being a photo element (41), which is aligned with the laser beam (9) emitted from the laser diode (40).