Bellows-Sealed Mirror Assembly for Dust-Free Optical Path Adjustment
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Solution Overview
Problem
Fine dust generated from movable parts of the driving section contaminates the optical path of the laser beam during adjustment of the optical path of the mirror in optical part assemblies.
Innovation Solution
The optical part assembly incorporates a mirror main body with a base and a mirror support section, a casing with an exposed opening, driving sections on the bottom plate, and a bellows seal to surround the mirror support section, preventing dust scattering during optical path adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a driving section is used to adjust the mirror angle for optical path adjustment, then the optical path can be adjusted to different angles, but fine dust generated from the movable part contaminates the optical path
Solution Approach 1:
The patent divides the assembly into separate sealed compartments: the driving section is isolated from the optical path region by sealing structures (seal ring, seal plate). This segmentation prevents dust generated in the driving section from contaminating the optical path while maintaining independent functionality of each component
Solution Approach 2:
Sealing structures (seal ring, seal plate) act as intermediary elements between the driving section and optical path region. These intermediaries block the transmission of dust particles from the driving section to the optical path while allowing mechanical action to be transmitted through the base
2Ease of operation
If the base is made movable to adjust the optical axis, then the optical path can be modified, but movable parts generate fine dust that scatters into the optical path
Solution Approach 1:
The patent extracts the dust-generating movable parts (driving section) from the optical path region and places them in a separate sealed compartment. The base remains movable for optical adjustment, but the dust generation source is removed from the optical environment, preventing contamination while maintaining adjustability
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 design allows for adjusting the mirror angle without contaminating the optical path, even when fine dust is generated, by using piezo-actuators and bellows seals to contain dust within the assembly.
Implementation Method 1
a bellows seal of which one end makes contact with a front end of the base, and the other end makes contact with the ring member to surround the mirror support section
Implementation Method 2
each of the driving sections includes a piezo-actuator and a pin which is connected to the piezo-actuator and a tip of which makes contact with the base
Data Source
AI summary
An optical part assembly includes a mirror main body including a base and a mirror support section that is formed integral with the base and having a projected tip, a mirror mounted on the projected tip of the mirror support section, a casing having in its tip part an opening in which the mirror support section is exposed, and having a rear end part closed with a bottom plate, a plurality of driving sections that are disposed on the bottom plate of the casing and act on the base to swing the base, a ring member that has an opening and is fixed to a front end part of the casing, and a bellows seal of which one end makes contact with a front end of the base and the other end makes contact with the ring member to surround the mirror support section.