CN213041375U

CN213041375U - Optical spectrum instrument grating rotary table direct-drive type rapid and accurate scanning wavelength positioning device

Info

Publication number: CN213041375U
Application number: CN202021774790.6U
Authority: CN
Inventors: 叶辉; 吴华华; 谢道祥; 何艳芬
Original assignee: Shanghai Meixi Instrument Co ltd
Current assignee: Shanghai Meixi Instrument Co ltd
Priority date: 2020-08-21
Filing date: 2020-08-21
Publication date: 2021-04-23
Anticipated expiration: 2030-08-21

Abstract

Spectrometer grating revolving stage direct-drive type fast accurate scanning wavelength positioner, outside installation step motor (1) on frame (2) of putting flatly, step motor (1) axle passes frame (2) and connects worm (5), worm (5) meshing connection worm wheel (7), installation revolving stage (6) on worm wheel (7), revolving stage (6) upside passes through fixing base (8) installation grating (9). The size of the transmission structure is reduced, the size is small, the structure is simple, the installation is convenient, and the contact part of the worm wheel and the worm is completely sealed and corrosion resistant. On the basis of ensuring the accuracy of wavelength scanning, the speed of wavelength scanning is obviously improved, and the problem that the high-accuracy scanning and the high-speed scanning positioning of the monochromator grating cannot be unified is solved. The problem of slow wavelength positioning of the monochromator is also solved.

Description

Optical spectrum instrument grating rotary table direct-drive type rapid and accurate scanning wavelength positioning device

Technical Field

The utility model belongs to the technical field of grating wavelength scanning positioner technique and specifically relates to quick accurate scanning wavelength positioner of spectral instrument grating revolving stage direct drive formula.

Background

Wavelength scanning is a technology for separating monochromatic light with different wavelengths from composite light by controlling the movement of a dispersion element in a spectrum instrument, and in the process, the grating rotation process, namely the process of selecting monochromatic light with different wavelengths to be output from a slit, is also called as a wavelength scanning process, so that a device and a method for realizing stable transmission of the grating and accurately measuring the rotation angle of the grating are called as a wavelength scanning device.

The conventional wavelength scanning device has two wavelength scanning mechanisms, one is a sine scanning structure adopting a stepping motor and a lead screw, and the other is a grating structure directly driven by the stepping motor or driven by a gear system.

The existing transmission mechanisms are large in size. Although the screw rod structure can meet the requirement of high precision, the transmission speed of the screw rod structure is low, and a long time is needed for scanning once from ultraviolet scanning to infrared wavelength, and the time for restarting and resetting each time is also long. The scanning speed of the structure of the stepping motor directly driving the grating is obviously improved compared with the traditional screw rod structure, but the running state of the stepping motor is unstable under a high subdivision state, so that the precision of the whole wavelength scanning system is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a quick accurate scanning wavelength positioner of spectral instrument grating revolving stage direct-drive formula reduces transmission structure volume, solves the unable unified problem of monochromator grating high accuracy scanning and high-speed scanning location.

The purpose of the utility model is realized by the following technical measures: comprises a stepping motor, a frame, a worm, a turntable, a worm wheel, a fixed seat and a grating; a stepping motor is arranged on the outer side of the horizontally arranged rack, a shaft of the stepping motor penetrates through the rack to be connected with a worm, the worm is meshed with a worm wheel, a rotary table is arranged on the worm wheel, and a grating is arranged on the upper side of the rotary table through a fixed seat.

Particularly, a socket is arranged on the frame and is connected with a power supply and the stepping motor.

In particular, the stepper motor shaft is coupled to the worm through a coupling.

Particularly, the grating is installed on the fixed seat through the adjusting seat. The adjusting seat is fixed on the fixed seat by an adjusting screw.

Particularly, the upper side of the rotary table is coaxially connected with the fixed seat through a rotating shaft, and a bearing is sleeved outside the rotating shaft.

The utility model discloses an advantage and effect: the size is small, the structure is simple, the installation is convenient, and the contact part of the worm wheel and the worm is completely sealed and corrosion resistant. On the basis of ensuring the wavelength scanning accuracy, the wavelength scanning speed is obviously improved, and the problem of slow wavelength positioning of a monochromator is solved.

Drawings

Fig. 1 is a schematic front view of an installation structure in embodiment 1 of the present invention.

Fig. 2 is a schematic top view of a local connection structure of a rack in embodiment 1 of the present invention.

The reference numerals include:

1-a stepping motor, 2-a frame, 3-a socket, 4-a coupler, 5-a worm, 6-a turntable, 7-a worm wheel, 8-a fixed seat, 9-a grating, 10-an adjusting seat, 11-a rotating shaft and 12-a bearing.

Detailed Description

The principle of the utility model lies in that a shaft coupling 4 is arranged on the output shaft of the stepping motor 1 to connect with a worm 5, and the worm 5 drives a worm wheel 7; step motor 1 drives the small-

size worm wheel

7 and 5 reduction gears of worm and grating revolving stage 6 of high reduction ratio, and worm wheel 7 sets up in frame 2 with 5 reduction gears of worm, install grating 9 through pivot 11 and fixing base 8 on grating revolving stage 6, moreover, install grating regulation seat 10 on fixing base 8, and installation adjusting screw on grating regulation seat 10, the grating is fixed on grating regulation seat, and fixing base 8 of grating 9 passes through adjusting screw to be fixed on regulation seat 10, is equipped with pivot 11 on the worm wheel 7, and the upper end of pivot 11 is connected with regulation seat 10, and the rotation of worm wheel 7 drives the rotation regulation of grating 9.

The utility model discloses a: the device comprises a stepping motor 1, a rack 2, a worm 5, a rotary table 6, a worm wheel 7, a fixed seat 8 and a grating 9.

The present invention will be further explained with reference to the drawings and examples.

Example 1: as shown in attached figures 1 and 2, a stepping motor 1 is installed on the outer side of a horizontally arranged rack 2, a shaft of the stepping motor 1 penetrates through the rack 2 to be connected with a worm 5, the worm 5 is meshed with a worm wheel 7, the worm wheel 7shang is provided with a rotary table 6, and the upper side of the rotary table 6 is provided with a grating 9 through a fixed seat 8.

In the foregoing, the frame 2 is provided with the socket 3, and the socket 3 is connected with the power supply and the stepping motor 1.

In the foregoing, the shaft of the stepping motor 1 is connected with the worm 5 through the coupling 4.

In the foregoing, the fixed seat 8 is provided with the grating 9 through the adjusting seat 10.

In the above, the fixing base 8 is coaxially connected to the upper side of the turntable 6 via the rotating shaft 11, and the bearing 12 is fitted around the rotating shaft 11.

The embodiment of the utility model provides an in, worm wheel 7 is connected worm 5 and is itself had outage self-locking function, even the shutdown restarts, and too big deviation can not appear in the direct scanning wavelength yet. The stepping motor 1 drives the precise worm wheel 7 and the worm 5 structure to drive the grating 9 to rotate.

The embodiment of the utility model provides an in, worm wheel 7 forms small-size reduction gears with the cooperation of worm 5, and structural length is less than 150mm, and the width is less than 70mm, highly only 45 mm.

The embodiment of the utility model provides an in, revolving stage 6 of grating 9 can adopt the mode of directly driving to carry out quick wavelength location through its step motor 1 from the area when scanning the wavelength, makes grating 9 rotate fast to the position near the target wavelength, then, the reduction gears of 1 drive high reduction ratio of rethread step motor carries out the accurate scanning of wavelength position, reaches accurate wavelength location.

In the embodiment of the utility model, a stepping motor 1 is fixed on a frame 2, the shaft of the stepping motor 1 is connected with a worm 5 through a coupling 4, a worm wheel 7 is connected with the worm 5, a rotating shaft 11 is arranged in the middle of the worm wheel 7, a bearing 12 is arranged outside the rotating shaft 11, the upper part of the rotating shaft 11 is connected with a fixed seat 8, and an adjusting seat 10 is arranged on the upper part of the fixed seat 8 and fixed by an adjusting screw; the grating 9 is fixed on the adjusting seat 10.

Claims

1. A spectrometer grating turntable direct-drive type rapid and accurate scanning wavelength positioning device comprises a stepping motor (1), a rack (2), a worm (5), a turntable (6), a worm wheel (7), a fixed seat (8) and a grating (9); the device is characterized in that a stepping motor (1) is installed on the outer side of a horizontally arranged rack (2), a shaft of the stepping motor (1) penetrates through the rack (2) to be connected with a worm (5), the worm (5) is meshed with a worm wheel (7), a rotary table (6) is installed on the worm wheel (7), and a grating (9) is installed on the upper side of the rotary table (6) through a fixed seat (8).

2. The spectrometer grating turntable direct-drive type fast and accurate scanning wavelength positioning device according to claim 1, wherein a socket (3) is mounted on the frame (2), and the socket (3) is connected with a power supply and the stepping motor (1).

3. The spectrometer grating turntable direct-drive type fast and accurate scanning wavelength positioning device according to claim 1, wherein a shaft of the stepping motor (1) is connected with the worm (5) through a coupler (4).

4. The spectrometer grating turntable direct-drive type fast and accurate scanning wavelength positioning device according to claim 1, wherein the fixed seat (8) is provided with the grating (9) through the adjusting seat (10).

5. The optical spectrum instrument grating rotary table direct-drive type rapid and accurate scanning wavelength positioning device as claimed in claim 1, characterized in that the upper side of the rotary table (6) is coaxially connected with the fixed seat (8) through a rotating shaft (11), and a bearing (12) is sleeved outside the rotating shaft (11).

6. The spectrometer grating turntable direct-drive type fast and accurate scanning wavelength positioning device according to claim 4, wherein the adjusting seat (10) is fixed on the fixing seat (8) by an adjusting screw.