Mirror Movement Mechanism With Nested Screw Grooves
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Solution Overview
Problem
Existing optical modules for spectroscopic analysis, such as those described in WO 2019/009404 and JP-T-2012-524295, face challenges in enhancing the translational performance of the movement mirror to prevent light displacement and ensure a sufficient movement amount for improved wavelength resolution, while also minimizing the size of the driver and preventing angular shifts during movement.
Innovation Solution
A mirror movement mechanism is proposed, comprising a movement mirror supported by an inner cylinder with a first screw groove, an outer cylinder with a second screw groove, and a driver that rotates the inner cylinder to move it along the central axis, thereby screwing the screw grooves together to maintain contact and minimize shifts, allowing for enhanced translational performance and large movement amounts without increasing driver size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the size of the driver is increased to ensure sufficient movement amount of the movement mirror, then the wavelength resolution is improved, but the device size increases
Solution Approach 1:
The inner cylinder is nested within the outer cylinder, with the first screw groove on the inner cylinder's outer surface and the second screw groove on the outer cylinder's inner surface. This nested configuration allows the screw grooves to engage and convert rotational motion to linear motion of the movement mirror, achieving sufficient movement amount for improved wavelength resolution while maintaining a compact driver size within the nested cylindrical structure.
2Measurement precision
If the translational performance of the movement mirror is enhanced to prevent light displacement, then the measurement accuracy is improved, but the device complexity increases
Solution Approach 1:
The driver is segmented into two separate cylindrical components: the inner cylinder supporting the movement mirror with the first screw groove, and the outer cylinder with the second screw groove. This segmentation allows independent optimization of each component's function while maintaining simple overall structure. The screw groove engagement between the two cylinders provides precise translational control to prevent light displacement during movement mirror operation.
3Measurement precision
If the movement amount of the movement mirror is increased to improve wavelength resolution, then the spectral information quality is improved, but the driver size must be increased
Solution Approach 1:
The driver employs a dynamic screw mechanism where rotational motion of the inner cylinder relative to the outer cylinder is dynamically converted to linear translational motion of the movement mirror. The engagement between the first and second screw grooves creates a dynamic transformation of motion types, enabling sufficient movement amplitude for improved wavelength resolution while keeping the driver's physical dimensions compact through efficient motion conversion.
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 proposed mirror movement mechanism effectively enhances the translational performance of the movement mirror, prevents angular shifts, and ensures a large movement amount, thereby improving the wavelength resolution of spectral information while maintaining a compact driver size.
Implementation Method 1
an inner cylinder supporting the movement mirror on an inner surface of the inner cylinder and having, on an outer surface of the inner cylinder, a first screw groove extending around a central axis; an outer cylinder having, on an inner surface thereof, a second screw groove screwed into the first screw groove
Data Source
AI summary
A mirror movement mechanism: includes: a movement mirror having a reflecting surface; an inner cylinder supporting the movement mirror on an inner surface thereof and having, on an outer surface thereof, a first screw groove extending around a central axis; an outer cylinder having, on an inner surface thereof, a second screw groove screwed into the first screw groove; and a driver configured to move the inner cylinder in a direction of the central axis by rotationally driving the inner cylinder with the central axis as a rotation axis.