Optoelectronic Module Calibration Using Cross-Talk Vector Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for calibrating optoelectronic modules to account for cross-talk from transmissive elements, such as cover glass, require large distances, making them impractical for manufacturers and users to implement effectively.
Innovation Solution
A method that involves positioning targets at short distances from the optoelectronic module to collect calibration data, using a non-transitory computer-readable medium to process signals and calculate a cross-talk vector, which is then used to calibrate the module for improved measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing calibration methods are used to collect pure cross talk signal, then calibration accuracy is improved, but the required distance becomes very large (10-30 meters or more)
Solution Approach 1:
The patent applies preliminary action by performing calibration measurements at short distances before actual operation. The system collects calibration data including cross-talk signals at distances of less than a meter, processes this data to determine cross-talk characteristics, and stores correction factors for later use during normal operation at any distance
Solution Approach 2:
The patent uses an intermediary approach by introducing a processor that separates and analyzes different signal components. The processor identifies cross-talk signals from transmissive elements, distinguishes them from legitimate target reflections, and calculates correction factors that are applied during measurement to eliminate cross-talk interference
2Ease of operation
If calibration is performed at short distances, then ease of operation is improved, but the ability to collect pure cross talk signal deteriorates
Solution Approach 1:
The system performs preliminary calibration measurements at short distances where both target reflections and cross-talk signals are present. By collecting data at multiple distances and processing it to identify cross-talk components, the system establishes correction factors that can be applied during actual operation
Solution Approach 2:
The patent implements feedback by using the processor to analyze received signals, identify cross-talk components based on their characteristic patterns, and generate correction factors that are stored and applied during subsequent measurements. This closed-loop approach allows the system to compensate for cross-talk effects even when calibrated at short distances
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
Enables accurate calibration and measurement of distance data within short distances, improving the accuracy of optoelectronic module measurements by accounting for cross-talk from transmissive elements.
Implementation Method 1
transmitting light from the transmission channel to a first target at a first distance; receiving light in the collection channel reflected from the first target at the first distance
Implementation Method 2
The optoelectronic module is operable to transmit light from the transmission channel and to receive light in the collection channel
Implementation Method 3
transmitted light may reflect from the transmissive element and may cause significant cross talk (e.g., light reflected from the transmissive element is collected by the channel configured to receive light)
Implementation Method 4
converting the received light into a first signal A; converting the received light into a second signal B
Data Source
Figure 1A~1B
Figure 1C~1D
Figure 2
AI summary
An optoelectronic module includes a non-transitory computer-readable medium comprising machine-readable instructions stored thereon, that when executed on a processor, perform operations for calibrating the optoelectronic module and collecting distance data with the optoelectronic module. Methods for calibrating and collecting distance data include using an optoelectronic module with the non-transitory computer-readable medium that includes the aforementioned instructions. In some instances, a first target is highly reflective, and a second target is highly absorbing.