US-20260126322-A1 - DOUBLE-LAYER TURRET MULTI-GRATING ON-AXIS ROTATION MODULE AND SPECTROMETER

Abstract

The present disclosure relates to a double-layer turret multi-grating on-axis rotation module and a spectrometer. The module includes a grating turret assembly, and the grating turret assembly includes a turret base and a plurality of grating elements provided on the turret base; a first rotation assembly, and the turret base is connected to the first rotation assembly, a rotation axis of the first rotation assembly and a central axis of the plurality of grating elements are on a same vertical line, and the grating turret assembly is driven to rotate by the first rotation assembly; a second rotation assembly, and the first rotation assembly is connected to the second rotation assembly.

Inventors

• Jing Chen
• Fei Tong
• Hongtai Cai
• Xinghai Chen

Assignees

• Zolix Analytical Instruments Co., Ltd.

Dates

Publication Date

20260507

Application Date

20251106

Priority Date

20241106

Claims (20)

1. 1 . A double-layer turret multi-grating on-axis rotation module, characterized in that the double-layer turret multi-grating on-axis rotation module comprises: a grating turret assembly, wherein the grating turret assembly comprises a turret base and a plurality of grating elements with different spectral resolutions, and the plurality of grating elements are vertically arranged on a top face of the turret base, and the plurality of grating elements are arranged in a coordinated manner to form a polygonal prism structure; a first rotation assembly, wherein the first rotation assembly is disposed below the grating turret assembly, a bottom face of the turret base is connected to the top of the first rotation assembly, a rotation axis of the first rotation assembly is on a same vertical line as a central axis of a plurality of grating elements, and the grating turret assembly is driven to rotate by the first rotation assembly to change the grating elements receiving light; and a second rotation assembly, wherein the second rotation assembly is disposed below the first rotation assembly, a bottom of the first rotation assembly is connected to a top of the second rotation assembly, and a rotation axis of the second rotation assembly is offset vertically from the rotation axis of the first rotation assembly; wherein in a horizontal direction, the distance between the rotation axis of the second rotation assembly and the rotation axis of the first rotation assembly is equal to the distance between the rotation axis of the first rotation assembly and the grating element, so that the grating element receiving light and the rotation axis of the second rotation assembly are located on a same vertical line, and the first rotation assembly is driven to rotate by the second rotation assembly.
2. 2 . The double-layer turret multi-grating on-axis rotation module according to claim 1 , wherein the grating turret assembly further comprises a turret main body, the bottom of the turret main body is connected to the top face of the turret base, the outer wall of the turret main body and along the circumferential direction thereof are provided with a plurality of grating brackets, the plurality of grating brackets correspond one-to-one with the plurality of grating elements, and the plurality of grating elements are respectively detachably connected to the corresponding grating brackets.
3. 3 . The double-layer turret multi-grating on-axis rotation module according to claim 2 , wherein the turret main body is a vertically arranged cylindrical structure, a top of the turret main body is provided with a turret cover plate, the rotation axis of the first rotation assembly passes through the turret base from bottom to top and extends into the interior of the turret main body, and the first rotation assembly is connected to the bottom face of the turret base, so that the turret main body is driven to rotate through the first rotation assembly.
4. 4 . The double-layer turret multi-grating on-axis rotation module according to claim 3 , wherein the first rotation assembly comprises a base plate, a first column body is disposed at a center of a top of the base plate, the first column body is a vertically arranged hollow columnar structure, a bottom of the first column body is connected to the base plate, and the first column body passes through the turret base from bottom to top and extends into the interior of the turret main body; the top of the base plate is provided with a first worm gear, the first worm gear is rotatably sleeved on an outer periphery of the first column body, the turret base is positioned above the first worm gear, and the bottom face of the turret base is connected to a top face of the first worm gear; and a side of the first worm gear is provided with a first motor and a first worm, an output shaft of the first motor is connected to an end of the first worm, and teeth on the first worm are meshed with teeth on the first worm gear to drive the first worm gear to rotate through the first motor.
5. 5 . The double-layer turret multi-grating on-axis rotation module according to claim 4 , wherein the first rotation assembly further comprises a first central rotation axis, a bottom end of the first central rotation axis is connected to the first worm gear, and the first central rotation axis passes through the bottom opening of the first column body from bottom to top and extends into the interior of the first column body; a first angular contact ball bearing is provided between the first central rotation axis and the inner wall of the first column body.
6. 6 . The double-layer turret multi-grating on-axis rotation module according to claim 4 , wherein the first motor is disposed on the base plate.
7. 7 . The double-layer turret multi-grating on-axis rotation module according to claim 5 , wherein the second rotation assembly comprises a base provided on a mounting table, a rotatable turntable is provided above the base, a second worm gear is provided at a top of the turntable, a top face of the second worm gear is connected to the bottom face of a connection plate, and a top face of the connection plate is connected to a bottom of the base plate; and a side of the second worm gear is provided with a second motor and a second worm, an output shaft of the second motor is connected to an end of the second worm, and teeth on the second worm are meshed with teeth on the second worm gear to drive the second worm gear to rotate through the second motor.
8. 8 . The double-layer turret multi-grating on-axis rotation module according to claim 7 , wherein a second column body protrudes upward from a center position of the top of the turntable, the second worm gear is sleeved on the outer periphery of the second column body, and the second worm gear is connected to the turntable by a bolt; and the outer periphery of the second column body is sleeved with a connection plate, the connection plate is located between the top face of the second worm gear and the bottom face of the base plate, and the second worm gear is connected to the base plate by the connection plate.
9. 9 . The double-layer turret multi-grating on-axis rotation module according to claim 7 , wherein the second rotation assembly further comprises a worm bracket arranged on the mounting table, the second worm is rotatably disposed on the worm bracket, and an end of the second worm is connected to the output shaft of the second motor through a coupling.
10. 10 . The double-layer turret multi-grating on-axis rotation module of claim 7 , wherein the second rotation assembly further comprises a second central rotation axis, the base is provided with a mounting hole extending vertically, the second central rotation axis is rotatably disposed in the mounting hole, a top end of the second central rotation axis extends from a top opening of the mounting hole and is connected to a bottom face of the turntable; and a second angular contact ball bearing is provided between the second central rotation axis and the inner wall of the mounting hole.
11. 11 . The double-layer turret multi-grating on-axis rotation module of claim 10 , wherein a distance between an axis of the first central rotation shaft and an axis of the second central rotation shaft is equal to a distance between the axis of the first central rotation shaft and a vertical centerline of the grating element.
12. 12 . The double-layer turret multi-grating on-axis rotation module according to claim 7 , wherein the second rotation assembly further comprises a limit pin and a tension spring, wherein the limit pin is disposed on the mounting table, an end of the tension spring is connected to the limit pin, and the other end of the tension spring is connected to the turntable to limit the rotation range of the second worm gear.
13. 13 . The double-layer turret multi-grating on-axis rotation module of claim 7 , wherein the second rotation assembly further comprises a first photoelectric sensor, and the first photoelectric sensor is configured to collect an optical signal to determine a rotational angle of the second worm gear.
14. 14 . The double-layer turret multi-grating on-axis rotation module of claim 12 , wherein the second rotation assembly further comprises a first photoelectric sensor, and the first photoelectric sensor is configured to collect an optical signal to determine a rotational angle of the second worm gear.
15. 15 . The double-layer turret multi-grating on-axis rotation module according to claim 4 , wherein the first worm gear is provided with a plurality of light-transmitting holes at positions near an edge thereof, the plurality of light-transmitting holes correspond one-to-one with the plurality of grating elements, and the plurality of light-transmitting holes are distributed at intervals along a circumference of the first worm gear; and the first rotation assembly further comprises a second photoelectric sensor arranged on the mounting table, and the second photoelectric sensor is located on a side of the first worm gear, and the second photoelectric sensor is configured to respectively collect corresponding optical signals when the plurality of light-transmitting holes are sequentially rotated to a position aligned with it.
16. 16 . The double-layer turret multi-grating on-axis rotation module according to claim 1 , wherein the number of grating elements is three, and among the three grating elements, the grating element located on a same vertical line as the rotation axis of the second rotation assembly faces an incident direction of the light.
17. 17 . A spectrometer, wherein the spectrometer comprises a double-layer turret multi-grating on-axis rotation module, wherein the double-layer turret multi-grating on-axis rotation module comprises: a grating turret assembly, wherein the grating turret assembly comprises a turret base and a plurality of grating elements with different spectral resolutions, and the plurality of grating elements are vertically arranged on a top face of the turret base, and the plurality of grating elements are arranged in a coordinated manner to form a polygonal prism structure; a first rotation assembly, wherein the first rotation assembly is disposed below the grating turret assembly, a bottom face of the turret base is connected to the top of the first rotation assembly, a rotation axis of the first rotation assembly is on a same vertical line as a central axis of a plurality of grating elements, and the grating turret assembly is driven to rotate by the first rotation assembly to change the grating elements receiving light; and a second rotation assembly, wherein the second rotation assembly is disposed below the first rotation assembly, a bottom of the first rotation assembly is connected to a top of the second rotation assembly, and a rotation axis of the second rotation assembly is offset vertically from the rotation axis of the first rotation assembly; wherein in a horizontal direction, the distance between the rotation axis of the second rotation assembly and the rotation axis of the first rotation assembly is equal to the distance between the rotation axis of the first rotation assembly and the grating element, so that the grating element receiving light and the rotation axis of the second rotation assembly are located on a same vertical line, and the first rotation assembly is driven to rotate by the second rotation assembly.
18. 18 . The spectrometer according to claim 17 , wherein the grating turret assembly further comprises a turret main body, the bottom of the turret main body is connected to the top face of the turret base, the outer wall of the turret main body and along the circumferential direction thereof are provided with a plurality of grating brackets, the plurality of grating brackets correspond one-to-one with the plurality of grating elements, and the plurality of grating elements are respectively detachably connected to the corresponding grating brackets.
19. 19 . The spectrometer according to claim 18 , wherein the turret main body is a vertically arranged cylindrical structure, a top of the turret main body is provided with a turret cover plate, the rotation axis of the first rotation assembly passes through the turret base from bottom to top and extends into the interior of the turret main body, and the first rotation assembly is connected to the bottom face of the turret base, so that the turret main body is driven to rotate through the first rotation assembly.
20. 20 . The spectrometer according to claim 19 , wherein the first rotation assembly comprises a base plate, a first column body is disposed at a center of a top of the base plate, the first column body is a vertically arranged hollow columnar structure, a bottom of the first column body is connected to the base plate, and the first column body passes through the turret base from bottom to top and extends into the interior of the turret main body; the top of the base plate is provided with a first worm gear, the first worm gear is rotatably sleeved on an outer periphery of the first column body, the turret base is positioned above the first worm gear, and the bottom face of the turret base is connected to a top face of the first worm gear; and a side of the first worm gear is provided with a first motor and a first worm, an output shaft of the first motor is connected to an end of the first worm, and teeth on the first worm are meshed with teeth on the first worm gear to drive the first worm gear to rotate through the first motor.

Description

CROSS-REFERENCE TO RELATED APPLICATION The present disclosure claims priority to Chinese Patent Application No. 202411572223.5, filed on Nov. 6, 2024, which is herein incorporated by reference in its entirety. TECHNICAL FIELD The present disclosure relates to the technical field of spectrometer spectral splitting, and particular to a double-layer turret multi-grating on-axis rotation module and a spectrometer. BACKGROUND A spectrometer is a scientific instrument that uses dispersive elements to decompose light with complex components into the desired wavelength or the wavelength region, and measures the intensity at the selected wavelength (or scanning over a specific spectral range). In order to better leverage the advantages of the spectrometer in covering the full spectral range and to more flexibly select the spectral range and resolution, it is necessary to introduce a multi-grating turret to meet the design requirements. At present, the multi-grating turret is mostly designed using the principle of “triangular prism”. The rotation axis of the grating is positioned at the center point of the “triangular prism”, which leads to the rotational axis of the grating to deviate from its theoretical position. The larger the clear aperture of the grating, the farther the actual rotation axis of the grating deviates from the theoretical rotation axis, thereby increasingly impairing the utilization efficiency of the grating. Aiming at the problem in the related art that the multi-grating spectrometer suffers from the deviation in the grating rotational axis, which adversely affects the utilization efficiency of the grating. Therefore, by drawing on years of experience and practice in the relevant field, the present inventor proposes a double-layer turret multi-grating on-axis rotation module and a spectrometer to overcome the limitations of the prior art. SUMMARY The present disclosure aims to provide a double-layer turret multi-grating on-axis rotation module and a spectrometer, which can avoid the deviation of the grating rotation axis, realize the on-axis rotation of the grating, effectively improve the utilization efficiency of the grating and improve the instrument performance of the spectrometer under the same conditions. The object of the present disclosure can be achieved by the following solutions: The present disclosure provides a double-layer turret multi-grating on-axis rotation module, the module including: a grating turret assembly, and the grating turret assembly includes a turret base and a plurality of grating elements with different spectral resolutions, and the plurality of grating elements are vertically arranged on a top face of the turret base, and the plurality of grating elements are arranged in a coordinated manner to form a polygonal prism structure;a first rotation assembly, and the first rotation assembly is disposed below the grating turret assembly, a bottom face of the turret base is connected to the top of the first rotation assembly, a rotation axis of the first rotation assembly is on a same vertical line as a central axis of a plurality of grating elements, and the grating turret assembly is driven to rotate by the first rotation assembly to change the grating elements receiving light; anda second rotation assembly, and the second rotation assembly is disposed below the first rotation assembly, a bottom of the first rotation assembly is connected to a top of the second rotation assembly, and a rotation axis of the second rotation assembly is offset vertically from the rotation axis of the first rotation assembly;in the horizontal direction, the distance between the rotation axis of the second rotation assembly and the rotation axis of the first rotation assembly is equal to the distance between the rotation axis of the first rotation assembly and the grating element, so that the grating element receiving light and the rotation axis of the second rotation assembly are located on a same vertical line, and the first rotation assembly is driven to rotate by the second rotation assembly. In an optional embodiment of the present disclosure, the grating turret assembly further includes a turret main body, the bottom of the turret main body is connected to the top face of the turret base, the outer wall of the turret main body and along the circumferential direction thereof are provided with a plurality of grating brackets, the plurality of grating brackets correspond one-to-one with the plurality of grating elements, and the plurality of grating elements are respectively detachably connected to the corresponding grating brackets. In an optional embodiment of the present disclosure, the turret main body is a vertically arranged cylindrical structure, a top of the turret main body is provided with a turret cover plate, the rotation axis of the first rotation assembly passes through the turret base from bottom to top and extends into the interior of the turret main body, and the first rot