Micromirror Light Deflection via Binary Beam Impingement Detection
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Solution Overview
Problem
Conventional laser scanner systems require complex and costly position-sensor systems for precise deflection of laser beams, which are prone to ageing effects and thermal errors, and involve high circuit expenditure for sensing and evaluation.
Innovation Solution
A device and method utilizing a micromirror with a detector system that generates a one-bit measuring signal to control periodic movement, eliminating the need for conventional position-sensor systems by detecting beam impingement or absence, and adapting actuating signals based on these signals to maintain precise deflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional position-sensor systems are used for precise deflection control, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the position detection function from the complex conventional position-sensor system and implements it through a simplified detector device that only needs to detect beam impingement. This separates the detection function from the control system, allowing the use of simple binary detection instead of complex continuous position sensing.
Solution Approach 2:
The patent implements feedback by using the detector device to monitor beam impingement and generating measuring signals that are fed back to the control unit. This feedback loop enables precise deflection control through binary signals indicating beam presence or absence, replacing complex position sensor feedback.
2Measurement precision
If conventional position-sensor systems are used, then measurement precision is improved, but reliability decreases due to ageing effects and thermal errors
Solution Approach 1:
The patent replaces expensive, sensitive position sensors with a simple, robust detector device that has no moving parts and is resistant to ageing. The detector essentially functions as a binary sensor that is inherently reliable and requires no calibration, making it comparable to a disposable component in terms of reliability.
Solution Approach 2:
The detector device automatically adapts to thermal conditions and ageing effects without requiring external calibration or compensation. The system self-adjusts by continuously monitoring beam impingement patterns, eliminating the need for manual thermo-calibration and maintaining reliability over time.
3Measurement precision
If conventional position-sensor systems are used, then measurement precision is improved, but loss of information increases due to high circuit expenditure
Solution Approach 1:
The patent segments the position detection information into discrete binary states (beam impingement present or absent). Instead of transmitting continuous position data, the system uses segmented binary measuring signals that indicate beam presence, significantly reducing data transmission requirements while maintaining control precision.
Solution Approach 2:
The patent uses partial information (binary impingement detection) instead of complete position information. By detecting only whether the beam impinges or not, rather than measuring the exact position continuously, the system achieves sufficient control with minimal data transmission, avoiding the information loss associated with high-bandwidth sensor systems.
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 reduces data requirements, avoids costly thermo-calibration, and enhances the reliability and availability of light deflection systems by simplifying position detection and compensating for ageing effects, while reducing thermal errors.
Implementation Method 1
a detector device (118), which is designed to detect, in particular periodically, an impinging or a missing impinging of the scanning beam of light (50) on the detector device (118)
Implementation Method 2
a deflection device (112), which is adjustable by an actuating signal (60) and deflects a supplied beam of light (50)
Data Source
AI summary
A device and a method for deflecting a beam of light. The device is developed together with: an adjustable deflection device; a closed-loop control unit, which is designed to generate an actuating signal by which the deflection device is controlled in a periodic movement for scanning a solid angle region with the aid of a beam of light deflected by the deflection device; and a detector device, which is designed to detect an impingement or a missing impingement of the scanning beam of light on the detector device, and to generate a measuring signal based thereon; the closed-loop control unit furthermore being designed to adapt the actuating signal based on at least the measuring signal.