CN106979751B - a beam splitter - Google Patents

Abstract

The invention relates to an optical splitter, comprising a motor, a grating bracket, a grating fixed on the grating bracket, a motor controller for controlling the motor, a zero return piece fixed on the top of the grating support and located on the upper part of the grating, and a zero return piece arranged on the top of the grating bracket The upper optocoupler and two plane reflectors and concave reflectors are both arranged on the bottom plate; there are incident slits and exit slits on the bottom plate; the spectroscopic device also includes a grating detection device, which includes a connecting ring, a connecting ring There are two monochromatic light source assemblies and a rotating rod connected on the circumference, the end of the rotating rod is connected with an armature, and the side of the bottom plate is located on both sides of the armature and electromagnets are arranged; Each of the monochromatic light source assemblies and the two electromagnets are connected with a power-on control switch. The utility model can realize automatic grating detection, thereby detecting the use state of the grating to determine whether to maintain and calibrate, and can detect without disassembly during detection.

Description

a beam splitter

technical field

The invention relates to a light splitter, which belongs to the field of optical equipment, and more specifically, the invention relates to a light splitter.

Background technique

The biochemical analyzer is one of the most frequently used, widest and most representative equipment in medical testing. It plays an important role in hospitals at all levels due to its advantages of fast, accurate and portable. Because the biochemical analyzer mainly uses reagents to react with serum or blood to generate substances with specific absorbance during detection, and then the spectroscopic device outputs monochromatic light of a single wavelength, and the monochromatic light irradiates the product after the above reaction and Analyze the absorbance or the change of absorbance by the instrument to judge whether the measured serum or blood sample exceeds the standard for a certain medical item, so as to determine whether the living body is healthy. Therefore, when performing biochemical analysis, it will be applied to the spectroscopic device.

In the patent with the application number "CN200920078935.6" and the title "A kind of optical splitter directly driven by a stepping motor", a kind of optical splitter directly driven by a stepping motor is disclosed, which can not only shorten the wavelength setting Time, and there is no mechanical contact and friction except for the moving parts except the motor, which can ensure the accuracy of monochromatic light output and the reliability of detection results. This patent mainly solves the technical problem of inaccurate monochromatic light output, and improves the overall stability and reliability of the device. However, in this patent, the grating bracket is fixed on the motor shaft by screws, and the grating bracket is rotated for a long time. The screw connection will be loose, which will cause the position of the grating to tilt or shift, resulting in the intensity deviation of the final output monochromatic light. Therefore, we need to design a spectroscopic device that can detect whether the grating meets the output requirements.

Contents of the invention

Based on the above technical problems, the present invention provides a spectrometer, thereby solving the technical problem that the grating accuracy of the conventional spectroscopic device cannot be detected by itself.

In order to solve the above technical problems, the technical scheme adopted in the present invention is as follows:

A beam splitter, comprising a motor, a grating bracket, a grating fixed on the grating bracket, a motor controller for controlling the motor, a zero return piece fixed on the top of the grating support and located on the upper part of the grating, and an optical Coupling and two plane reflectors and concave reflectors are arranged on the base plate, the base plate is fixedly connected with the end face of the motor, and the grating bracket is fixed on the rotating shaft of the motor, and the motor and the optocoupler are also connected with the motor control The device is connected; the base plate is also provided with an incident slit and an exit slit on both sides of the grating;

The spectroscopic device also includes a grating detection device arranged on the same side of the incident slit on the bottom plate. The grating detection device includes a connecting ring, and the circumference of the connecting ring is connected with two monochromatic light source assemblies with different light source intensities and a rotating rod. The monochromatic light source components are located on the same side of the connecting ring and arranged at intervals, and the two monochromatic light source components can be rotated to the entrance end of the incident slit and coaxial with the incident slit, and the end of the rotating rod is connected with an armature, so Electromagnets are arranged on both sides of the armature on the side of the bottom plate; the connecting ring is connected with a rotating shaft, and the rotating shaft is rotatably connected to the bottom plate; a torsion spring is provided outside the rotating shaft, and the two ends of the torsion spring respectively The bottom plate and the connecting ring are fixedly connected;

The two monochromatic light source assemblies and the two electromagnets are connected with power control switches.

Preferably, the bottom plate is provided with a groove on the same side of the incident slit, the grating detection device and the electromagnet are both arranged in the groove, and the two monochromatic light source assemblies protrude out of the groove through the folded plate.

Preferably, a transverse plate is connected between the two folded plates.

Preferably, the sides of the armature facing the electromagnet are inclined surfaces.

Preferably, the end surface of the electromagnet facing the armature is provided with anti-collision soft rubber.

Preferably, the monochromatic light source assembly includes a condensing tube, one end of the condensing tube is threadedly connected to a cover, and the inner side of the cover is buckled with a monochrome SMD LED; the other end of the condensing tube is provided with a light hole .

Preferably, the wall of the light exit hole is in a circular arc transition and is located at the opening of the light exit hole to form a smooth plane.

Compared with the prior art, the beneficial effect of the present invention is that the structure of the present invention is simple, and automatic grating detection can be realized without changing the structure of the spectroscopic device, thereby detecting the use status of the grating to determine whether to maintain and calibrate, and to detect It can be detected by itself without disassembly, and it can be completed without providing other equipment, which reduces the process and time of calibration and detection.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a side view of Fig. 1;

Fig. 3 is a structural schematic diagram of a monochromatic light source assembly;

The symbols in the figure are respectively represented as: 1. incident slit; 2. monochrome light source assembly; 3. folding plate; 4. connecting ring; 5. rotating shaft; 6. torsion spring; 7. rotating rod; 8. armature; 9. Groove; 10. Concave reflector; 11. Bottom plate; 12. Return to zero piece; 13. Exit slit; 14. Optocoupler; 15. Grating; 16. Grating bracket; 17. Plane reflector; 18. Motor Controller; 19. Motor; 20. Horizontal plate; 21. Electromagnet; 22. Anti-collision soft rubber; 23. Light hole; 24. Condenser tube; 25. Tube cover; buckle.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings. Embodiments of the present invention include, but are not limited to, the following examples.

Example

As shown in Fig. 1-Fig. 3, a kind of beam splitter, comprises motor 19, grating support 16, the grating 15 that is fixed on the grating support 16, is used for the motor controller 18 of control motor 19, is fixed on the top of grating support 16 and The zero return sheet 12 positioned at the top of the grating 15, the optocoupler 14 arranged above the return zero sheet 12, and the two plane reflectors 17 and the concave reflector 10 all arranged on the base plate 11, the base plate 11 and the motor 19 The end faces are fixedly connected, and the grating support 16 is fixed on the rotating shaft of the motor 19, and the motor 19 and the optocoupler 14 are also connected with the motor controller 18; There is an entrance slit 1 and an exit slit 13;

The spectroscopic device also includes a grating detection device arranged on the same side of the incident slit 1 on the bottom plate 11, the grating detection device includes a connecting ring 4, and the circumference of the connecting ring 4 is connected with two monochromatic light source assemblies 2 with different light source intensities and a rotating rod 7. The two monochromatic light source assemblies 2 are located on the same side of the connecting ring 4 and arranged at intervals, and the two monochromatic light source assemblies 2 can be rotated to the entrance end of the incident slit 1 and coaxial with the incident slit 1, The end of the rotating rod 7 is connected with an armature 8, and the side of the base plate 11 is located on both sides of the armature 8 and is provided with an electromagnet 21; the connecting ring 4 is connected with a rotating shaft 5, and the rotating shaft 5 and the base plate 11 are rotatable The connection of the rotating shaft 5 is provided with a torsion spring 6, and the two ends of the torsion spring 6 are fixedly connected with the base plate 11 and the connecting ring 4 respectively;

Both the two monochromatic light source assemblies 2 and the two electromagnets 21 are connected with power control switches.

The working principle of this embodiment is: the composite light emitted by the light source is first incident on the plane reflector 17 through the incident slit 1, and then the composite light is reflected by the plane reflector 17 onto the concave reflector 10; the concave reflector 10 receives After the recombined light is focused, the recombined light after focusing is reflected to the grating 15; the grating 15 splits the light after receiving the recombined light after focusing, and reflects the recombined light after the recombination to the concave reflector 10; finally The concave reflector 10 focuses the splitted composite light again and reflects it to the plane reflector 17 near the exit slit 13 , and is reflected by the plane reflector 17 and output through the exit slit 13 .

In this embodiment, when it is necessary to detect whether the position of the grating is tilted or shifted, one of the two electromagnets 21 is controlled to be energized through the energization control switch, and the energized electromagnet 21 absorbs the armature 8 to drive the connecting ring 4 to rotate. The spring 6 is twisted and stored under the drive of the connecting ring 4. At the same time, after the connecting ring 4 rotates, one of the two monochromatic light source assemblies 2 rotates to the entrance of the incident slit 1 and is coaxial with the incident slit 1. The control switch connects the circuit of the monochromatic light source assembly 2, the monochromatic light source assembly 2 is turned on and provides a monochromatic light source, the monochromatic light source is output from the exit slit 13 through the above-mentioned optical path, because the light intensity of the monochromatic light source assembly 2 is known , at this time, by detecting the light intensity of the emitted light or observing the ratio of its light and dark stripes, it can be detected whether there is a deviation in the output light, and then whether there is a deviation in the position of the grating, so as to determine whether the device is usable or needs maintenance and adjustment; when After the detection is completed, the circuit of the above-mentioned electromagnet 21 and the monochromatic light source assembly 2 is closed. At this time, the torsion spring 6 restores the deformation and drives the connecting ring 4 to rotate to the original position; Another electromagnet 21 and the circuit of the monochromatic light source assembly 2 are tested again, and the detection results of the two are combined for comprehensive analysis to improve the accuracy of the detection results. For the monochromatic light source assembly 2 of this embodiment, it is preferable to select two light sources with different intensities in order to improve the detection accuracy.

Considering the overall structure of the device in this embodiment, a groove 9 is provided on the same side of the base plate 11 as the incident slit 1, and the grating detection device and the electromagnet 21 are both arranged in the groove 9, and the two monochromatic The light source components 2 protrude out of the groove 9 through the folding plate 3 . Therefore, the grating detection device and the electromagnet 21 can be arranged in the groove 9 without protruding from the bottom plate 11, which reduces the occupied space and volume, and ensures that the detection can be realized under the requirements of the size and structure of the original device.

In this embodiment, a transverse plate 20 is also connected between the two folded plates 3 . The transverse plate 20 can connect the two folded plates 3 together, thereby increasing the stability of the two, and avoiding the shaking of the monochromatic light source assembly 2 during the adsorption process of the electromagnet 21 .

In this embodiment, the sides of the armature 8 facing the electromagnet 21 are inclined surfaces. When the armature 8 is attracted to the electromagnet 21 and attached to the electromagnet 21 , the contact surface of the inclined surface is the largest, so that the adsorption force of the electromagnet 21 to the armature 8 can be increased.

In this embodiment, the end surface of the electromagnet 21 facing the armature 8 is provided with anti-collision soft rubber 22 . The anti-collision soft rubber 22 can reduce the impact force of the mutual collision between the electromagnet 21 and the armature 8, and reduce the damage of both.

On the basis of the above technical solutions, the monochromatic light source assembly 2 of this embodiment includes a condenser tube 24, one end of the condenser tube 24 is threadedly connected with a cylinder cover 25, and the inner side of the cylinder cover 25 is fastened with a monochromatic patch LED 26 through a buckle 27. ; The other end of the condenser tube 24 is provided with a light exit hole 23 . The monochromatic light emitted by the monochrome SMD LED26 is condensed by the light-emitting tube 24 to form a light beam through the light outlet 23. The light-condensing tube 24, the cover 25 and the monochrome SMD LED26 are all connected in a detachable manner, so as to facilitate installation. Commissioning and maintenance.

The wall of the above-mentioned light exit hole 23 has a circular arc transition and is located at the opening of the light exit hole 23 to form a smooth plane. The hole wall of the light outlet hole 23 tends to be a smooth plane after a circular arc transition, so that the port position of the light outlet hole 23 is a flat circumferential surface, and the light emitted from the light outlet hole 23 can be guaranteed to be emitted in a straight line, and the light is condensed to ensure The monochromatic light can enter the incident slit 1 with very little loss, ensuring accurate detection results.

The foregoing is an embodiment of the present invention. The above examples and the specific parameters in the examples are only for clearly expressing the inventor's invention verification process, and are not used to limit the scope of patent protection of the present invention. The scope of patent protection of the present invention is still subject to its claims. The equivalent structural changes made in the specification and drawings of the present invention should be included in the protection scope of the present invention in the same way.

Claims (9)

1. The utility model provides a beam splitter, includes motor (19), grating support (16), grating (15), motor controller (18), return of to zero piece (12), opto-coupler (14), plane speculum (17) and concave mirror (10), its characterized in that:

A. the optical grating (15) is fixed on the optical grating bracket (16), the return-to-zero piece (12) is arranged on the upper part of the optical grating (15) and is fixed on the top end of the optical grating bracket (16), and the optical coupler (14) is arranged above the return-to-zero piece (12);

B. the plane reflector (17) and the concave reflector (10) are both arranged on the bottom plate (11), the bottom plate (11) is fixedly connected with the end face of the motor (19), the grating support (16) is fixed on the rotating shaft of the motor (19), an incident slit (1) and an emergent slit (13) are further respectively arranged on two sides of the grating (15) on the bottom plate (11), a grating detection device is arranged on the same side of the incident slit (1), the grating detection device and the electromagnet (21) are both arranged in the groove (9), the grating detection device comprises a connecting ring (4), the connecting ring (4) is connected with a rotating shaft (5), the rotating shaft (5) is connected with the rotating shaft (11), two monochromatic light source assemblies (2) with different light source intensities are circumferentially connected with the connecting ring (4), and an armature (8) is connected to the end of the rotating rod (7);

C. the motor (19) and the optocoupler (14) are connected with a motor controller (18); the two monochromatic light source assemblies (2) can rotate to the inlet end of the entrance slit (1) and are coaxial with the entrance slit (1); the two monochromatic light source components (2) extend out of the groove (9) through the folded plates (3), a transverse plate (20) is further connected between the two folded plates (3), and the two monochromatic light source components (2) can rotate to the inlet end of the entrance slit (1) and are coaxial with the entrance slit (1).

2. A beam splitter as claimed in claim 1, wherein: the two monochromatic light source assemblies (2) are arranged on the same side of the connecting ring (4) at intervals, and the two monochromatic light source assemblies (2) and the two electromagnets (21) are connected with an electrifying control switch.

3. A beam splitter as claimed in claim 1, wherein: electromagnets (21) are arranged on two sides of the side face of the bottom plate (11) which are located on two sides of the armature (8).

4. A beam splitter as claimed in claim 1, wherein: the rotating shaft (5) is sleeved with a torsion spring (6), and two ends of the torsion spring (6) are fixedly connected with the bottom plate (11) and the connecting ring (4) respectively.

5. A beam splitter as claimed in claim 1, wherein: grooves (9) are formed in the same side of the bottom plate (11) and the incident slit (1).

6. A beam splitter as claimed in claim 1, wherein: the side faces of the armatures (8) facing the electromagnets (21) are inclined faces.

7. A beam splitter as claimed in claim 1, wherein: an anti-collision soft rubber (22) is arranged on the end face of the electromagnet (21) facing the armature (8).

8. A beam splitter as claimed in claim 1, wherein: the monochromatic light source assembly (2) comprises a light condensing barrel (24), one end of the light condensing barrel (24) is connected with a barrel cover (25) in a threaded mode, a monochromatic patch LED (26) is connected to the inner side of the barrel cover (25) in a buckling mode through a buckle (27), and a light emitting hole (23) is formed in the other end of the light condensing barrel (24).

9. A beam splitter as recited in claim 8, wherein: the hole wall of the light emergent hole (23) is in arc transition and is positioned at the hole opening of the light emergent hole (23) to form a smooth plane.

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