Parabolic Mirror Angle Adjustment Mechanism for Infrared Spectrophotometers
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Solution Overview
Problem
Existing optical measurement analyzers with parabolic mirrors housed in optical systems lack a mechanism for fine angle adjustments without opening the housing, leading to complex procedures and potential damage to humidity-sensitive components.
Innovation Solution
An angle adjustment mechanism utilizing screws with external heads and shafts that engage with the parabolic mirror through the housing, allowing for angle changes by varying the length of engagement, while maintaining airtightness and precise adjustment without opening the housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the parabolic mirror is screwed to the wall surface of the housing without an angle adjustment mechanism, then the structure is simple, but fine adjustments of the mirror angle cannot be made
Solution Approach 1:
The adjustment mechanism is segmented into independent components: a screw with head outside the housing, a shaft passing through the housing wall, and an engaging portion inside the housing that connects to the parabolic mirror. This segmentation allows the adjustment function to be added without redesigning the entire mounting structure.
Solution Approach 2:
The shaft acts as an intermediary element that transmits the adjustment force from the screw (outside the housing) to the parabolic mirror (inside the housing). The engaging portion serves as another intermediary that connects the shaft to the mirror, enabling angle adjustment while maintaining housing integrity.
2Ease of operation
If the screw head is arranged inside the housing to adjust the parabolic mirror angle, then the structure is compact, but the housing must be opened for adjustment causing complicated works
Solution Approach 1:
The screw head is positioned in a different spatial dimension (outside the housing) rather than inside, allowing adjustment operations to be performed from the exterior. The shaft extends through the housing wall to connect this external adjustment interface to the internal parabolic mirror, solving the accessibility problem without compromising housing seal integrity.
3Ease of operation
If the housing is opened to adjust the parabolic mirror angle, then direct access to the mirror is achieved, but humidity-sensitive components are exposed to environmental humidity
Solution Approach 1:
The shaft and engaging portion serve as intermediaries that allow the adjustment force to be transmitted through the housing wall without opening it. This maintains the protective seal of the housing, preventing environmental humidity from reaching the humidity-sensitive optical components while still enabling angle adjustment of the parabolic mirror.
Data Source
AI summary
A typical configuration of the angle adjustment mechanism according to the present invention is provided with a parabolic mirror, a housing accommodating a parabolic mirror, a screw including a head arranged outside the housing and a shaft engaged with the parabolic mirror through a hole formed in the housing, and a base portion in contact with both the housing and the parabolic mirror. A force is applied to an engaging portion of the parabolic mirror in a direction approaching the housing and a force is applied to a portion of the parabolic mirror in contact with the base portion in a direction away from the housing. The angle of the parabolic mirror with respect to the housing changes in accordance with the change in the length of a portion where the shaft and the parabolic mirror engage.