Optoelectronic Sensor Carrier Recesses Reduce Scattered Light
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing optoelectronic sensors face issues with incorrect distance measurements due to the influence of disturbing scattered light from the environment, which can cause objects to be misidentified as background or vice versa.
Innovation Solution
The optoelectronic sensor features a carrier with recesses or openings around the transmitter to reduce scattered light, specifically designed to eliminate critical areas that contribute to this issue, thereby minimizing the impact of stray light on the measurement focus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the transmitter illuminates the immediate surroundings, then the background and object are illuminated for detection, but scattered light from the transmitter environment causes incorrect distance measurements and object misidentification
Solution Approach 1:
The patent extracts and removes the problematic scattered light from the measurement path by introducing a mask element that blocks light from the transmitter's immediate surroundings from reaching the receiver, while preserving the useful illumination of the background and object
Solution Approach 2:
The mask element acts as an intermediary component positioned between the transmitter and receiver, selectively blocking harmful scattered light paths while allowing the useful light paths from the background and object to reach the receiver
2Measurement precision
If blackening or lateral closure of the transmitter environment is used, then scattered light is reduced, but device complexity and manufacturing difficulty increase
Solution Approach 1:
Instead of uniformly blackening or enclosing the entire transmitter environment, the patent applies a mask element with specific local geometry that targets only the critical scattered light paths, achieving the desired effect with minimal structural addition
Solution Approach 2:
The patent changes the geometric parameters of the mask element (position, size, shape) to optimize the blocking of scattered light while minimizing the impact on the overall device structure and manufacturing complexity
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 solution significantly reduces the effect of scattered light, preventing incorrect object or background identification and ensuring accurate distance measurements by eliminating sources of interference near the transmitter.
Implementation Method 1
a transmitter for emitting a transmitted light beam into the monitored area, a receiver for detecting a received light beam from the monitored area, the received light beam depending on a distance of the object to be detected from the optoelectronic sensor assumes a variable beam angle relative to the transmitted light beam
Implementation Method 2
the position of the image is usually defined by the center of intensity in the image
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The sensor (100) has a transmitter (20) for transmission of transmission light bundles (22) into a monitoring area (40), and a receiver (30) for detection of reception light bundles (38, 39). A control and evaluation unit (50) is provided for processing of measurement data of the receiver and for outputting a switching signal when an object (44) is detected in the monitoring area. The transmitter is arranged on a carrier, where the carrier is provided with a recess for reduction of scattered light from an environment of the transmitter.