Acoustic Tube Damping for Microscope Beam Path
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Solution Overview
Problem
Microscopes, particularly scanning microscopes, face significant acoustic emissions from rapidly moving components like resonantly oscillating mirrors, leading to undesirable noise that is difficult to dampen without interfering with the optical beam path, as existing soundproof housings with optical windows result in reduced transmittance and interference.
Innovation Solution
The acoustic insulation housing is configured to achieve sound damping through destructive interference by using openings that allow sound to be extinguished without affecting the optical beam, employing tubes with lateral branches that create 180° phase changes, and optionally incorporating acoustic absorbers to manage sound frequencies and wavelengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If soundproof windows are used to encapsulate the sound source, then acoustic emissions are reduced, but optical transmittance decreases and interference is produced
Solution Approach 1:
The patent extracts the sound damping function from the optical path by using a separate acoustic tube system that does not require windows. The tube extends from the housing interior to the exterior, allowing sound waves to be damped acoustically without blocking the optical path, thus eliminating the need for soundproof windows that would reduce transmittance and create interference.
Solution Approach 2:
The acoustic tube acts as an intermediary element that separates the acoustic damping function from the optical transmission function. By providing a dedicated acoustic pathway through the housing wall, the system allows sound waves to be intercepted and damped without requiring the optical path to be blocked by windows, thus mediating between acoustic insulation and optical transmission requirements.
2Object-affected harmful factors
If a hermetically sealed housing is used to encapsulate the sound source, then acoustic emissions are reduced, but the installation of variable components becomes difficult
Solution Approach 1:
The housing is segmented into functional zones: a hermetically sealed interior for acoustic insulation and a separate acoustic tube system for sound damping. This segmentation allows the housing to maintain its hermetic seal for acoustic purposes while the acoustic tube provides a dedicated pathway that facilitates the installation and operation of variable components without compromising the hermetic seal.
Solution Approach 2:
The acoustic tube system provides a dynamic solution that accommodates variable components. The tube can be configured with different lengths and positions to adapt to varying operational requirements, allowing the housing to maintain its hermetic seal while enabling flexible installation and operation of components within the acoustic damping pathway.
3Object-affected harmful factors
If the housing is designed for acoustic insulation, then sound waves are reduced, but the optical beam path is affected
Solution Approach 1:
The acoustic damping function is extracted from the optical path by using a separate acoustic tube system. The tube extends through the housing wall and provides a dedicated acoustic pathway that does not interfere with the optical beam, allowing sound waves to be damped without affecting optical transmission quality.
Solution Approach 2:
The housing is designed with local acoustic damping structures (the acoustic tube) that are specifically positioned to intercept sound waves without interfering with the optical beam path. The acoustic tube creates a localized acoustic field that damps sound while leaving the optical path unaffected, applying acoustic insulation only where needed without compromising optical quality.
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 effectively reduces objectionable sound emissions from microscopes without influencing the optical beam path, allowing for efficient noise suppression even with resonantly oscillating components, and can be adjusted for varying frequencies through tunable tube branches and materials.
Implementation Method 1
the housing, preferably the opening of the housing, is embodied and/or configured in such a way that the sound emerging, without soundproof windows, from the housing is largely extinguished by destructive interference
Implementation Method 2
an acoustic insulation housing (housing) for encapsulating a sound-emitting component
Implementation Method 3
the tube is equipped with at least one tube branch protruding laterally from the tube, such that the tube branch can be embodied in the manner of a blind hole
Data Source
AI summary
An apparatus for damping sound in the optical beam path of a microscope, having an acoustic insulation housing for encapsulating a sound-emitting component, preferably a rapidly moving or oscillating beam deflection means, in particular a resonantly oscillating mirror, the housing comprising at least one optical entrance/exit opening, is characterized in that the housing, preferably the opening of the housing, is embodied and/or configured in such a way that the sound otherwise emerging from the housing is largely extinguished by destructive interference without thereby influencing the optical beam. A microscope having a corresponding apparatus is furthermore claimed.