Diaphragm Securing for Laser Scanner Light Intensity Control
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Solution Overview
Problem
Existing optoelectronic sensor devices, such as laser scanners, require costly and time-consuming application of paint or adhesive strips to reduce light intensity on receiving lenses, especially when using plastic lenses, limiting flexibility and increasing costs.
Innovation Solution
Securing a diaphragm directly to the securing device of the sensor device, allowing it to remain in place after removing the receiving optics, eliminating the need for additional coatings and enabling various configurations with different securing devices and materials, thus reducing costs and time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If paint or adhesive strips are applied to the receiving lens to reduce light intensity, then the reception sensitivity is reduced to prevent over-modulation, but the manufacturing cost and time increase significantly
Solution Approach 1:
The patent extracts the light-intensity-reducing function from the receiving lens itself and relocates it to a separate diaphragm component. This diaphragm is positioned in the light path between the receiving lens and the photodiode array, allowing the lens to remain clean and simple while still achieving the necessary attenuation of light intensity to prevent over-modulation of the photodiodes.
Solution Approach 2:
The patent segments the optical system into distinct functional components: the receiving lens for focusing light, the diaphragm for controlling light intensity, and the photodiode array for detection. This segmentation allows each component to be optimized independently and simplifies manufacturing by avoiding the need to modify the lens surface with paint or adhesive strips.
2Illumination intensity
If paint or adhesive strips are applied to plastic receiving lenses, then light intensity is reduced, but the complexity of the device increases and flexibility is limited
Solution Approach 1:
The patent introduces a diaphragm as an intermediary component between the receiving lens and the photodiode array. This diaphragm serves as a mediator that controls the light intensity reaching the photodiodes without requiring modification of the lens itself. The diaphragm can be made from various materials and designed in different configurations to achieve the desired attenuation while maintaining system flexibility.
3Stability of the object's composition
If the receiving optics are secured to a securing device, then the sensor device becomes more stable, but the cost and time for additional components increase
Solution Approach 1:
The patent merges the securing function with the diaphragm component by providing a securing device that integrates both the support structure and the light-intensity-control function. This combining approach reduces the number of separate components needed, simplifies assembly, and lowers overall manufacturing cost while maintaining the stability of the receiving optics.
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 approach minimizes expenditure by eliminating the need for separate coatings, allows for flexible configuration with different securing devices, and ensures a stable and precise reduction of light intensity, preventing over-modulation of photodiodes.
Implementation Method 1
a diaphragm (21) which is designed to reduce the intensity of the reception signal
Implementation Method 2
receiving optics, in particular a receiving lens (13), which is arranged ahead of the receiving elements (9, 10, 11) in the propagation direction (14) of the reception signal (8), and which serves, for example, to focus the reception signal (8) on the receiving elements (9, 10, 11)
Implementation Method 3
The receiving unit has at least two receiving elements (for example photo diodes)
Data Source
AI summary
The invention relates to an optoelectronic sensor device (1) for a motor vehicle, for detecting objects located in the surroundings of the motor vehicle, having a transmitting unit (2) for emitting an optical transmission signal (5), having a receiving unit (7) for receiving a reception signal (8) which is the transmission signal (5) reflected by an object, wherein the receiving unit (7) has at least two receiving elements (9, 10, 11) which are arranged distributed along a distribution direction (12), and reception optics (13), in particular a receiving lens which is positioned ahead of the receiving elements (9, 10, 11) in the propagation direction (14) of the reception signal (8), having a securing device (22) for securing the receiving optics (13), and having a diaphragm (21, 21′) for reducing the intensity of the reception signal (8), wherein the diaphragm (21, 21′) is secured to the securing device (22).