Laser Scanner Deflection Mirror Mounting for Cleaning Access
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Solution Overview
Problem
Conventional laser scanners face challenges in maintaining measurement accuracy during cleaning, as the relative positioning of the deflection mirror changes when the rotor housing is removed for cleaning, and are prone to stray light interference due to dynamic deformations and environmental influences.
Innovation Solution
The laser scanner design features a deflection mirror mounted directly on the hollow spindle, with a counterweight for optimal positioning and reduced mass, and incorporates strategically placed pockets with anti-reflective coatings to minimize stray light, allowing for easy cleaning without recalibration and maintaining measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the deflection mirror is mounted on the rotor housing for easy cleaning access, then cleaning becomes simpler, but the relative positioning of the deflection mirror changes when the rotor housing is removed, requiring recalibration
Solution Approach 1:
The patent divides the scanner into separate functional modules: the deflection mirror is mounted on the hollow spindle (rotating part), while the rotor housing (stationary part) can be independently removed for cleaning. This segmentation allows the optical path components to remain fixed relative to each other while enabling access to the outlet window for maintenance.
Solution Approach 2:
The beam guide serves as an intermediary component that connects the deflection mirror to the hollow spindle. It provides a stable mounting interface that maintains precise positioning of the deflection mirror during rotation, while allowing the rotor housing to be detached without affecting this positioning.
2Ease of operation
If the rotor housing is removed for cleaning the outlet window, then cleaning accessibility is improved, but the relative positioning of the deflection mirror changes, requiring new scanner calibration
Solution Approach 1:
The patent separates the rotor housing from the beam path components by mounting the deflection mirror on the hollow spindle. This allows the rotor housing to be removed for cleaning without disturbing the precisely positioned deflection mirror and beam guide, eliminating the need for recalibration.
3Stability of the object's composition
If a massive construction is used to attach the rotor housing to the hollow spindle for stable positioning, then positioning stability is improved, but the device complexity and mass increase
Solution Approach 1:
The patent combines the deflection mirror mounting directly with the hollow spindle, eliminating the need for a separate massive rotor housing attachment structure. The beam guide integrates the mounting functions, providing stable positioning with reduced mass and complexity.
Solution Approach 2:
The patent uses a lightweight beam guide structure instead of massive rigid construction. This thin-walled component provides sufficient structural stability for precise positioning while significantly reducing the overall mass and complexity of the rotating assembly.
4Volume of moving object
If the deflection mirror is positioned close to the outlet window for compact design, then device compactness is improved, but stray light interference increases due to dynamic deformations and environmental influences
Solution Approach 1:
The patent extracts the deflection mirror from the outlet window area by mounting it on the hollow spindle with the beam guide. This spatial separation removes the mirror from the region affected by outlet window deformations and environmental influences, reducing stray light interference while maintaining compact overall design.
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 design enables simple and effective cleaning of the laser scanner without affecting measurement accuracy and minimizes stray light interference, ensuring reliable 360° profile measurements even under dynamic and environmental stressors.
Implementation Method 1
a deflection mirror (46) for deflecting the receiving/measurement beam in the direction of or from a protective glass (50) covering the outlet window (48)
Data Source
AI summary
A laser scanner includes a laser head for emitting a measurement beam of a rotating deflection unit driven for deflecting the measurement beam in the direction of a measuring object. The scanner further includes a detector module for detecting the reception/measurement beam reflected by the measuring object, and a control and evaluation unit for signal processing. The deflection unit has a hollow spindle, which carries a beam guide to which a deflection mirror is associated for deflecting the reception/measurement beam in the direction of or from an outlet window held on a rotor housing. At least one pocket is formed on the beam guide, which is aligned in such a way that the deflection mirror is fixed to the beam guide or to the hollow spindle.