Concave Toroidal Grating Retainer for Stable Spectrometer Alignment
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Solution Overview
Problem
Conventional spectrometers with toroidal diffraction grating surfaces are not stably fixed and cannot adjust the groove direction due to the lack of a suitable retainer that can securely contact and rotate with the grating surface.
Innovation Solution
A spectrometer design featuring a concave toroidal grating surface and a retainer with a convex contact surface that fits the grating surface, allowing stable fixation and adjustable groove direction through rotational alignment within a housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a cylindrical retainer with a flat end surface is used to fix a toroidal grating, then the retainer structure is simple, but the grating cannot be stably fixed and may tilt
Solution Approach 1:
The retainer's end surface is designed with a convex curved surface that matches the concave toroidal grating surface, creating a curved contact interface. This curvature matching ensures stable fixation by distributing contact over a larger area and preventing tilting, while the overall retainer remains cylindrically simple in structure.
2Ease of manufacture
If a cylindrical retainer with a flat end surface is used to fix a toroidal grating, then the manufacturing is easy, but the groove direction cannot be adjusted through rotation
Solution Approach 1:
The convex curved end surface of the retainer is designed to rotate smoothly within the housing opening while maintaining contact with the toroidal grating surface. This curved interface enables the groove direction to be adjusted by rotating the retainer, combining ease of manufacture with operational flexibility.
3Stability of the object's composition
If a retainer with a convex contact surface fitting the toroidal grating is used, then the grating can be stably fixed and rotated for adjustment, but the retainer structure becomes more complex
Solution Approach 1:
The retainer maintains a simple cylindrical overall structure while incorporating a convex curved end surface that fits the toroidal grating. This localized curvature application provides stable fixation and rotational capability without significantly increasing the overall device complexity.
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 spectrometer achieves stable fixation and precise adjustment of the grating surface, ensuring accurate light dispersion and spectral analysis without tilting, enhancing the precision and reliability of wavelength separation.
Implementation Method 1
The retainer comprises an end surface having a convex contact surface relating (fitting) the grating surface, wherein the convex contact surface contacts with the grating surface
Implementation Method 2
a reflective grating that has a concave grating surface and disperses (splits) each incident light to the light having different wavelength
Implementation Method 3
The incident light into the grating surfaces 101, 201 is incident onto the grating surfaces 101, 201 through the retainers 103, 203 and reflected on the grating surfaces 101, 201, and the light dispersed by the reflection is guided to the detector through the retainers 103, 203
Data Source
AI summary
A spectrometer includes a grating, a cylinder retainer and a housing. The grating comprises a grating surface having a concave toroidal form. The retainer comprises an end surface having a convex contact surface compatible with the grating surface, wherein the contact surface contacts with the grating surface. The housing includes an opening which the retainer fits in.