Adjustable Diaphragm Laser Line Generation
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Solution Overview
Problem
Existing laser systems struggle to generate a narrow, clearly visible laser line across multiple distance ranges without requiring protective measures, as the width of the laser line varies with distance and visibility decreases at greater distances.
Innovation Solution
Incorporating an adjustable diaphragm device between the laser beam source and the deflection optical unit allows for the shaping of the laser beam, reducing the beam diameter to maintain a narrow laser line across different distance ranges by adjusting the aperture diameter of the diaphragm aperture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the laser power is limited to prevent damage to the human eye, then safety is improved, but the visibility of the laser line decreases at greater distances
Solution Approach 1:
The patent divides the operating distance range into two segments: a first distance range with greater distances and a second distance range with smaller distances. For each segment, different beam diameters are used to optimize visibility while maintaining safety. This segmentation allows the system to adapt to different operational requirements without compromising eye safety.
Solution Approach 2:
The patent employs an adjustable diaphragm device that can dynamically change the beam diameter between a first beam diameter for the first distance range and a second beam diameter for the second distance range. This dynamic adjustment enables the system to optimize laser line visibility for each distance range while maintaining eye safety through controlled power levels.
2Shape
If the beam diameter is reduced to generate a narrow laser line, then line width is improved, but the visibility of the laser line decreases
Solution Approach 1:
The adjustable diaphragm device enables dynamic adjustment of the beam diameter between a first beam diameter (larger) for greater distances and a second beam diameter (smaller) for smaller distances. This dynamic control allows the system to generate narrow laser lines when needed while maintaining adequate visibility by using larger beam diameters at greater distances where the laser line would otherwise be less visible.
Solution Approach 2:
The patent changes the beam diameter parameter based on the distance range: a first beam diameter is used for the first distance range (greater distances) and a second beam diameter is used for the second distance range (smaller distances). This parameter change optimizes both the narrowness of the laser line and its visibility across different operating conditions.
3Illumination intensity
If a larger beam diameter is used to improve visibility at greater distances, then visibility is improved, but the laser line width increases
Solution Approach 1:
The system dynamically adjusts the beam diameter based on the distance range: using a first beam diameter (larger) for the first distance range to ensure visibility at greater distances, and a second beam diameter (smaller) for the second distance range to maintain narrow line width when visibility is less critical. This dynamic adjustment resolves the contradiction between visibility and line width.
4Adaptability or versatility
If an adjustable diaphragm device is added to control beam diameter, then adaptability to different distance ranges is improved, but device complexity increases
Solution Approach 1:
The adjustable diaphragm device serves multiple functions: it controls the beam diameter, adapts the system to different distance ranges, and optimizes both visibility and line width for various operating conditions. This multi-functionality justifies the added complexity by providing a single component that addresses multiple requirements.
Solution Approach 2:
The diaphragm device enables parameter changes in the beam diameter to adapt to different distance ranges. By adjusting the aperture size, the system can optimize performance for either greater distances (larger beam diameter) or smaller distances (smaller beam diameter), providing versatility without requiring multiple separate 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
The adjustable diaphragm device enables the laser system to generate a narrow, clearly visible laser line in multiple distance ranges, ensuring optimal visibility and utilizing the full laser power at greater distances.
Implementation Method 1
The adjustable diaphragm device can shape the laser beam that the laser beam source generates and reduce the beam diameter. The beam diameter is in this case reduced by way of the aperture diameter of the diaphragm aperture.
Implementation Method 2
The focusing optical unit of the laser system is selected such that the beam waist of the laser beam lies in the first distance range and a narrow, clearly visible laser line is generated on the projection surface.
Implementation Method 3
a deflection optical unit, designed as a pentaprism (14)
Data Source
AI summary
A laser system for generating a laser line includes a laser beam source which generates a laser beam, a beam-shaping optical unit which is configured as a focusing optical unit and reshapes the laser beam into a focused laser beam, and a deflection optical unit which deflects an incident laser beam into a propagation plane perpendicularly to a beam axis of the incident laser beam. An adjustable diaphragm device is disposed between the laser beam source and the deflection optical unit.