Laser Optical Path Cover with Protruding Light Absorbers
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Solution Overview
Problem
The existing optical path covers for laser devices require complex machining and separate steps to form protruding portions, making their production difficult, and conventional metal covers reflect unwanted light, reducing their effectiveness in absorbing diverging laser light.
Innovation Solution
An optical path cover with a cylindrical structure featuring elongated protruding portions on its inner walls, which can be produced by extrusion, allowing easy machining and efficient absorption of unwanted light without reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional metal optical path cover is used, then the unwanted light is reflected off the inner wall with high reflectivity, but the unwanted light cannot be removed effectively
Solution Approach 1:
The inner wall of the optical path cover is equipped with light-absorbing portions at specific locations where unwanted light tends to travel, rather than treating the entire surface uniformly. This localized approach allows the cover to absorb unwanted light effectively while maintaining a simple overall structure and avoiding the need for complex surface treatments across the entire inner wall.
2Reliability
If protruding portions are formed on the inner wall to cause laser light divergence, then light absorption is improved, but separate machining steps are required making production difficult
Solution Approach 1:
The light-absorbing portions are integrated directly into the optical path cover body as a unified structure, combining the cover function and light absorption function into a single component. This eliminates the need for separate protruding portions or additional machining steps, allowing the component to be produced in one manufacturing process while maintaining effective light absorption capabilities.
3Volume of moving object
If optical component is downsized to fit narrow spacing, then the volume is reduced, but the thermal capacity is reduced and the amount of unwanted light to be absorbed decreases
Solution Approach 1:
Instead of uniformly increasing the volume of the optical path cover, light-absorbing portions are strategically placed at specific locations where unwanted light concentrates. This localized approach allows the component to maintain a compact overall size while having sufficient light-absorbing material at critical positions to handle the thermal load from unwanted light effectively.
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 optical path cover can be easily manufactured and effectively absorbs unwanted light, preventing its divergence and reducing temperature increases and beam quality degradation in laser devices.
Implementation Method 1
an optical component to remove the unwanted light around the main beam... As an optical component to remove the unwanted light, an aperture or an optical slit is used, through which the main beam passes while the unwanted light around the main beam is absorbed
Data Source
AI summary
An optical path cover is located on an optical path through which beam light travels. The optical path cover includes a cylindrical portion through which the beam light is capable of passing. A plurality of protruding portions are formed on inner walls of the cylindrical portion, the inner walls facing toward a side of an optical axis of the beam light. The protruding portions, each of which has a convex shape in cross-section taken perpendicularly to the optical axis, are arranged next to each other with the convex shape facing toward the side of the optical axis. Each of the protruding portions has an elongated shape extending along the optical axis.