A circularly polarized light spectrum measuring instrument with synchronous adjustment

Abstract

The application relates to the field of spectrum measuring instruments, in particular to a circularly polarized spectrum measuring instrument capable of synchronous adjustment, which comprises an angle table installed on the surface of a base, an input box and a receiving box installed on the angle table near the center line on both sides, laser emitters and receiving plates respectively installed on one side of the input box and the receiving box, input polarizers and receiving polarizers respectively installed in the input box and the receiving box for emitting and receiving circularly polarized light, and a detection table arranged on the surface of the base and used for bearing a detected object. Laser emitters and receiving plates respectively arranged on one side of the input box and the receiving box are used for separately detecting incident and outgoing angles, the incident and outgoing angles of polarized light are simulated before sample detection, synchronous adjustment of the input polarizer and the receiving polarizer is carried out, the detection automation degree of the circularly polarized spectrum measuring instrument is further improved, and the detection efficiency is improved to a certain extent.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of spectral measurement instruments, in particular to a circularly polarized spectrum measurement instrument capable of synchronous adjustment. BACKGROUND

[0002] The circularly polarized spectrum measurement instrument is an instrument capable of measuring and analyzing the characteristics of circularly polarized light, which is a light wave composed of two mutually perpendicular linearly polarized lights with a certain phase difference. It has applications in the fields of material science, biomedical science, chemistry, etc. The device achieves detection of sample chirality, molecular structure and optical activity through the incidence and emission angle of circularly polarized light.

[0003] Currently, when using a circularly polarized spectrum measurement instrument to detect the spectrum of a sample, it is usually necessary to adjust the angle between the input polarizer and the receiving polarizer for detection, so that the circularly polarized light (i.e. incident light) emitted by the input polarizer can be irradiated onto the surface of the sample to be measured, and after reflection, the reflected light (i.e. outgoing light) can be received by the receiving polarizer for subsequent spectral analysis. Therefore, the angle of the two needs to be adjusted before detection. In actual operation, due to the large number of samples to be detected, the different compositions and materials of the samples to be measured, etc., the angle of each sample needs to be adjusted one by one. Frequent adjustment requires a lot of manpower, and the receiving polarizer is far away from the sample to be detected. The outgoing light is easily affected and disturbed by impurities such as oxygen and water in the air. It should be understood that the outgoing light source is relatively weak due to the power drop caused by reflection, and is affected and disturbed by environmental light sources, oxygen, etc. This leads to insufficient detection accuracy of the outgoing light, and further causes the detected data to deviate from the actual data, thereby affecting the detection efficiency to some extent. SUMMARY

[0004] In view of the above or the slow detection angle adjustment speed and the problem of easy environmental influence and further detection efficiency decline of the circularly polarized spectrum measurement instrument in the prior art, the present application is proposed.

[0005] Therefore, the purpose of the present application is to provide a circularly polarized spectrum measurement instrument capable of synchronous adjustment.

[0006] To solve the above technical problems, the application provides the following technical scheme: a base, an angle table installed on the surface of the base, an input box and a receiving box installed on both sides of the angle table close to the center line, a laser emitter and a receiving plate respectively installed on one side of the input box and the receiving box, an input polarizer and a receiving polarizer respectively installed in the input box and the receiving box for emitting and receiving circularly polarized light, a detection table arranged on the surface of the base for carrying a detected object, the detection table being connected to the base through a carrier mechanism, the carrier mechanism being used to drive the detection table to reciprocate between the irradiation range of the laser emitter and the irradiation range of the input polarizer, an adjusting mechanism arranged in the angle table and used to adjust the irradiation and receiving angles of the input polarizer and the receiving polarizer, and a light shielding mechanism arranged in the receiving box and used to reduce the influence of the environment on the outgoing circularly polarized light.

[0007] As a preferred scheme of the application, the adjusting mechanism comprises a first connecting rod and a second connecting rod coaxially connected to the inner wall of the angle table, the first connecting rod is connected to the base through a first air cylinder, the second connecting rod is connected to the base through a second air cylinder, and the upper end of the first connecting rod is fixedly connected to the receiving box, and the upper end of the second connecting rod is fixedly connected to the input box.

[0008] As a preferred scheme of the application, the carrier mechanism comprises an electric push rod fixedly connected to the surface of the base, a sliding groove is formed in the surface of the base, a sliding block is slidably connected to the sliding groove through the sliding groove, the output end of the electric push rod is fixedly connected to the sliding block, and the detection table is fixedly connected to the top of the sliding block.

[0009] As a preferred scheme of the application, the receiving plate is arc-shaped, and a plurality of laser receivers are fixedly connected to the side of the receiving plate close to the laser emitter.

[0010] As a preferred scheme of the application, the light shielding mechanism comprises a light shielding cover sleeved on the surface of the receiving polarizer, a driving member is arranged on the side of the receiving box away from the receiving plate and used to enable the light shielding cover and the receiving polarizer to move transversely in the receiving box, and the movement directions of the light shielding cover and the receiving polarizer are opposite.

[0011] As a preferred scheme of the application, the light shielding cover is provided with a sleeve ring on the side close to the inside of the receiving box, the sleeve ring is hollow, a gas pipe is fixedly connected to one side of the sleeve ring, a plurality of air cavities are formed in the light shielding cover and communicated with the inside of the sleeve ring, a plurality of flow guide cavities are formed in the inner wall of the light shielding cover and communicated with the inside of the air cavities, and the cross section of the flow guide cavities is inclined.

[0012] The rotating mechanism for rotating the light shield further comprises a gear ring fixedly connected to the surface of the light shield, a plurality of guide rods fixedly connected to one side of the gear ring, the guide rods being arranged in the light shield, and a plurality of springs connecting the gear ring with the light shield.

[0013] As a preferred scheme of the circularly polarized light spectrum measuring instrument capable of synchronous adjustment, the driving member comprises a third driving motor fixedly connected to one side of the receiving box, a second screw rod fixedly connected to the output end of the third driving motor, a first movable plate and a second movable plate fixedly connected to the surfaces of the receiving polarizer and the sleeve ring respectively, and the first movable plate and the second movable plate are both threadedly connected to the surface of the second screw rod, the surface of the second screw rod is provided with a right thread and a reverse thread respectively, and the first movable plate and the second movable plate correspond to the right thread and the reverse thread respectively.

[0014] As a preferred scheme of the circularly polarized light spectrum measuring instrument capable of synchronous adjustment, the input box is fixedly connected to a first driving motor on one side, the output end of the first driving motor is fixedly connected to a first screw rod, the surface of the first screw rod is threadedly connected to a connecting plate, and the connecting plate is fixedly connected to the input polarizer.

[0015] As a preferred scheme of the circularly polarized light spectrum measuring instrument capable of synchronous adjustment, the input polarizer is connected to an external polarized light input device through an input lead wire, and the receiving polarizer is connected to an external polarized light detection device through a receiving lead wire.

[0016] As a preferred scheme of the circularly polarized light spectrum measuring instrument capable of synchronous adjustment, the top of the base is fixedly connected to an angle plate close to the surface of the angle table.

[0017] The circularly polarized light spectrum measuring instrument capable of synchronous adjustment has the following beneficial effects: the laser emitter and the receiving plate for separately detecting the incident and emergent angles are arranged on the input box and the receiving box respectively, the incident and emergent angles of the polarized light are simulated before sample detection, the synchronous adjustment of the input polarizer and the receiving polarizer is performed, the detection automation degree of the circularly polarized light spectrum measuring instrument is further improved, and the detection efficiency is improved to a certain extent.

[0018] Further, the light shield is arranged around the receiving polarizer, which is used for reducing the influence of the weak light on the absorption caused by the environment when the receiving polarized light, improving the receiving accuracy, and further blowing nitrogen in the light shield to drive away oxygen and water vapor in the optical path of the instrument, thereby reducing the interference on the optical path. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of a circular polarization spectrum measuring instrument with synchronous adjustment.

[0021] Figure 2 It is a schematic diagram of the front view structure of a circular polarization spectrum measuring instrument with synchronous adjustment.

[0022] Figure 3 It is a schematic diagram of the second view angle of a circular polarization spectrum measuring instrument with synchronous adjustment.

[0023] Figure 4 It is a schematic diagram of the adjustment mechanism of a circular polarization spectrum measuring instrument with synchronous adjustment.

[0024] Figure 5 It is a schematic diagram of the internal section of the adjustment mechanism of a circular polarization spectrum measuring instrument with synchronous adjustment.

[0025] Figure 6 It is a second schematic diagram of the section of the adjustment mechanism of a circular polarization spectrum measuring instrument with synchronous adjustment.

[0026] Figure 7 It is a third schematic diagram of the section of the adjustment mechanism of a circular polarization spectrum measuring instrument with synchronous adjustment.

[0027] Figure 8 It is a schematic diagram of the light shield of a circular polarization spectrum measuring instrument with synchronous adjustment.

[0028] In the figure: 100, base; 110, detection table; 120, electric push rod; 130, sliding block; 200, angle table; 210, angle plate; 211, first connecting rod; 212, second connecting rod; 213, first air cylinder; 214, second air cylinder; 300, input box; 310, input polarizer; 311, input lead wire; 312, connecting plate; 313, first driving motor; 314, first screw rod; 320, laser emitter; 400, receiving box; 410, receiving plate; 411, laser receiver; 420, receiving polarizer; 421, receiving lead wire; 430, light shield; 431, collar; 432, air pipe; 433, air cavity; 434, flow guide cavity; 440, tooth ring; 441, guide rod; 442, spring; 443, second driving motor; 444, gear; 450, third driving motor; 451, second screw rod; 452, first movable plate; 453, second movable plate. DETAILED DESCRIPTION

[0029] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0030] Reference Figures 1-2 For the first embodiment of the present application, the embodiment provides a synchronous adjustable circular polarization spectrum measuring instrument, which comprises a base 100, an angle table 200 installed on the surface of the base 100, and an input box 300 and a receiving box 400 installed on both sides of the angle table 200 close to the center line, the input box 300 and the receiving box 400 are respectively provided with a laser emitter 320 and a receiving plate 410 on one side, and the input box 300 and the receiving box 400 are respectively provided with an input polarizer 310 and a receiving polarizer 420 for emitting and receiving circularly polarized light, a detection table 110 is arranged on the surface of the base 100 and used for carrying a detected object, and the detection table 110 is connected with the base 100 through a carrier mechanism, and the carrier mechanism is used for driving the detection table 110 to reciprocate between the irradiation range of the laser emitter 320 and the irradiation range of the input polarizer 310.

[0031] Specifically, the input polarizer 310 emits circularly polarized light, which is irradiated to the surface of the detected sample on the surface of the detection table 110, and then the reflected polarized light on the surface of the sample is captured by the receiving polarizer 420, and in order to ensure that the refracted light emitted after the incident light irradiates the sample can be accurately captured, the relative angle of the input box 300 and the receiving box 400 needs to be adjusted before detection.

[0032] An adjusting mechanism is arranged in the angle table 200 and used for adjusting the irradiation and receiving angles of the input polarizer 310 and the receiving polarizer 420, and a light shielding mechanism is arranged in the receiving box 400 and used for reducing the influence of the environment on the outgoing circularly polarized light. Although the incident angle is equal to the reflection angle in the reflection law, the circularly polarized light may change the phase or polarization state after being reflected by the sample due to the material characteristics of the sample (such as chirality, molecular structure, etc.), so that the receiving polarizer needs to be adjusted to a specific angle to capture the effective signal. Therefore, the angles of the input polarizer 310 and the receiving polarizer 420 need to be synchronously adjusted according to the reflection characteristics of the sample, rather than being fixed at the same angle. Directly relying on the scale on the angle plate to manually adjust the efficiency is low, especially when the sample is various or needs to be adjusted frequently. The technical solution realizes the automatic synchronous adjustment of the input polarizer 310 and the receiving polarizer 420 by real-time detection of the reflected light position through the laser emitter 320 and the receiving plate 410, and the adjusting mechanism. This automatic method not only reduces the labor consumption, but also improves the accuracy and speed of angle matching, and adapts to complex detection requirements.

[0033] During use, the sample to be detected is placed on the surface of the detection table 110, and the sample is first moved to the irradiation range of the laser emitter 320 by the carrier mechanism, so that the laser emitter 320 first irradiates the surface of the sample, and reflected light is generated on the surface of the sample, and the reflected light is further received by the receiving plate 410. According to the position of the reflected light on the surface of the receiving plate 410, the adjusting mechanism adjusts the irradiation and receiving angle of the input polarizer 310 and the receiving polarizer 420, thereby automatically completing the angle adjustment and reducing the amount of manual labor.

[0034] It should be noted that the angle plate 210 is fixedly connected to the top of the base 100 close to the surface of the angle table 200, and the surface of the angle plate 210 is marked with a scale for intuitively displaying the relative angle of the input polarizer 310 and the receiving polarizer 420 at this time, and providing observation reference for automatic adjustment, and further improving the accuracy by manually adjusting the input polarizer 310 and the receiving polarizer 420.

[0035] Referring to Figure 2 In this embodiment, the adjusting mechanism includes a first connecting rod 211 and a second connecting rod 212 coaxially connected to the inner wall of the angle table 200, the first connecting rod 211 and the second connecting rod 212 are coaxially rotatable and do not affect each other, the first connecting rod 211 is connected to the base 100 through a first air cylinder 213, the output end of the first air cylinder 213 is hinged to the first connecting rod 211, and the fixed end is hinged to the base 100, the second connecting rod 212 is connected to the base 100 through a second air cylinder 214, the output end of the second air cylinder 214 is hinged to the second connecting rod 212, and the fixed end is hinged to the base 100, and the upper end of the first connecting rod 211 is fixedly connected to the receiving box 400, and the upper end of the second connecting rod 212 is fixedly connected to the input box 300.

[0036] Specifically, the inner wall of the angle table 200 is provided in a semicircular shape, and the coaxial shafts of the first connecting rod 211 and the second connecting rod 212 are located at the center of the semicircle, and the input box 300 and the receiving box 400 are limited to slide in the inner wall of the angle table 200, and the movement trajectories of the two are in an arc shape, so that when the first connecting rod 211 or the second connecting rod 212 outputs, the first connecting rod 211 and the second connecting rod 212 are pushed to rotate coaxially, and the receiving box 400 and the input box 300 are respectively driven to rotate in an arc in the inner wall of the angle table 200, thereby synchronously adjusting the angle.

[0037] It should be noted that the first air cylinder 213 and the second air cylinder 214 are electric air cylinders, and the controllability of the output distance is high, thereby further enhancing the angle adjustment accuracy of the receiving box 400 and the input box 300.

[0038] Referring to Figure 1As shown, the carrier mechanism comprises an electric push rod 120 fixedly connected to the surface of the base 100, the surface of the base 100 is provided with a sliding groove, and a sliding block 130 is slidingly connected to the sliding groove, the output end of the electric push rod 120 is fixedly connected to the sliding block 130, and the detection table 110 is fixedly connected to the top of the sliding block 130. Through the output of the electric push rod 120, the sliding block 130 can be pushed to slide in the sliding groove, and the detection table 110 on the top of the sliding block 130 can be synchronously moved, so that the sample can be moved to the irradiation range of the laser emitter 320 and also can be moved to the irradiation range of the input polarizer 310.

[0039] As shown, the detection table 110 can be pulled out by the electric push rod 120, so when the sample needs to be placed, the electric push rod 120 can be completely retracted to pull out the detection table 110, so that the sample can be conveniently placed, and the sample is not hindered by the receiving box 400 and the input box 300 when the sample is placed.

[0040] Further, referring to Figure 4 As shown, the receiving plate 410 is arc-shaped, and a plurality of laser receivers 411 are fixedly connected to the side of the receiving plate 410 close to the laser emitter 320, and the arc-shaped surface of the receiving plate 410 facilitates the reception of the outgoing light.

[0041] In specific use, the laser emitted by the laser emitter 320 irradiates on the surface of the sample and irradiates on any position on the surface of the receiving plate 410 after reflection. In order to ensure the receiving accuracy of the receiving polarizer 420, it is necessary to ensure that the reflection point is located at the center position of the receiving plate 410. Therefore, after the laser receiver 411 at any position on the surface of the receiving plate 410 receives the reflection signal, the synchronous angle adjustment of the receiving box 400 and the input box 300 is controlled and adjusted according to the position of the laser receiver 411, until the laser point irradiates on the surface of the laser receiver 411 at the center position of the receiving plate 410, and then the synchronous adjustment is completed.

[0042] It is worth noting that the laser receiver 411 at the center position of the receiving plate 410 and the receiving center of the receiving polarizer 420 are located on the same parallel line, and the emission point position of the laser emitter 320 and the emission center of the input polarizer 310 are located on the same parallel line.

[0043] Referring to Figure 5 As shown, the light shielding mechanism comprises a light shielding cover 430 sleeved on the surface of the receiving polarizer 420, and the side of the receiving box 400 away from the receiving plate 410 is provided with a driving member for moving the light shielding cover 430 and the receiving polarizer 420 transversely in the receiving box 400, and the movement directions of the light shielding cover 430 and the receiving polarizer 420 are opposite. The light shielding cover 430 is sleeved on the surface of the receiving polarizer 420, and when the receiving polarizer 420 moves away from the measured sample due to measurement needs, the light shielding cover 430 moves in the opposite direction and shields the receiving light path of the receiving polarizer 420, thereby reducing external interference.

[0044] Further, referring to Figure 7 and Figure 8 As shown in the figure, the light shield 430 is provided with a sleeve ring 431 on the side close to the inside of the receiving box 400, the inside of the sleeve ring 431 is hollow, and a gas pipe 432 is fixedly connected to one side of the sleeve ring 431, the gas pipe 432 is connected with an external nitrogen supply device for supplying nitrogen, the gas pipe 432 is communicated with the inside of the sleeve ring 431, a plurality of air cavities 433 are formed in the light shield 430 and communicated with the inside of the sleeve ring 431, a plurality of flow guide cavities 434 are formed in the inner wall of the light shield 430 and communicated with the inside of the air cavities 433, and the cross section of the flow guide cavities 434 is inclined.

[0045] When the light path is shielded by the light shield 430, nitrogen gas with a certain pressure is supplied by the external nitrogen supply device, the flow rate of the nitrogen gas is preferably set to 0.1-0.5 L / min, the nitrogen gas enters the sleeve ring 431 through the gas pipe 432 and continues to enter the air cavities 433 in the light shield 430, and is blown out through the flow guide cavities 434. Since the flow guide cavities 434 are inclined, the nitrogen gas flow rate is reduced, and the nitrogen gas is guided to the inner wall of the light shield 430, avoiding the nitrogen gas directly passing out and affecting the circularly polarized light passing through the center of the inner wall of the light shield 430. The moisture or oxygen around the light path is effectively inhibited by the sweeping nitrogen gas, further reducing the influence on the reflected polarized light.

[0046] Specifically, since moisture and oxygen may form a film on the surface of the optical fiber, causing loss or attenuation of circularly polarized light, nitrogen gas as an inert gas can reduce interference on the light path and correspondingly reduce the concentration of oxygen, water and the like. Nitrogen gas has less interaction with light at room temperature, so replacing oxygen or water vapor can reduce light scattering and absorption.

[0047] Further, referring to Figures 5-7 As shown in the figure, the light shield 430 is provided with a sleeve ring 431 on the side close to the inside of the receiving box 400, the inside of the sleeve ring 431 is hollow, and a gas pipe 432 is fixedly connected to one side of the sleeve ring 431, the gas pipe 432 is connected with an external nitrogen supply device for supplying nitrogen, the gas pipe 432 is communicated with the inside of the sleeve ring 431, a plurality of air cavities 433 are formed in the light shield 430 and communicated with the inside of the sleeve ring 431, a plurality of flow guide cavities 434 are formed in the inner wall of the light shield 430 and communicated with the inside of the air cavities 433, and the cross section of the flow guide cavities 434 is inclined.

[0048] Specifically, under the elastic force of the spring 442, the spring 442 pushes the gear ring 440 to move towards the gear 444, and the gear ring 440 is engaged with the gear 444. Under the output of the second driving motor 443, the gear 444 rotates to drive the gear ring 440 to rotate synchronously, and the rotation of the gear ring 440 drives the light shield 430 to rotate synchronously. The rotating light shield 430 can further improve the uniformity of the nitrogen blowing coverage, thereby further reducing the influence on the reflected polarized light.

[0049] It should be noted that the stroke of the spring 442 can be adjusted, that is, the stroke is reduced, so that when the light shield 430 extends a short distance and blocks a small amount of light path, the spring 442 is completely relaxed and does not engage the gear ring 440 with the gear 444, thereby the light shield 430 does not rotate. Since the light path is short, it is not necessary to rotate to blow nitrogen uniformly, thereby effectively reducing the power output and improving the economy at this time. Further, when the light shield 430 extends a short distance, the nitrogen supply device can also be controlled to stop outputting nitrogen, and only the light shield is used. The stroke adjustment of the spring 442 can be realized by the following methods. First, the initial tension of the spring 442 can be adjusted by adjusting the compression length of the spring 442, such as adjusting the screw or buckle position for fixing the spring 442, thereby limiting the movement range of the light shield 430; different free lengths or elastic coefficients of the spring 442 can be replaced to adapt to the required stroke; in addition, adjustable limit blocks or baffles can be arranged in the receiving box 400 to limit the movement distance of the gear ring 440, thereby indirectly controlling the extension range of the spring 442.

[0050] Referring to Figure 6 As shown in the figure, the driving member includes a third driving motor 450 fixedly connected to one side of the receiving box 400, a second screw rod 451 fixedly connected to the output end of the third driving motor 450, a first movable plate 452 and a second movable plate 453 fixedly connected to the surfaces of the receiving polarizer 420 and the sleeve ring 431 respectively, and the first movable plate 452 and the second movable plate 453 are both threadedly connected to the surface of the second screw rod 451. The surface of the second screw rod 451 is respectively provided with a right thread and a left thread, and the first movable plate 452 and the second movable plate 453 correspond to the right thread and the left thread respectively.

[0051] By providing the right thread and the left thread on the surface of the second screw rod 451, when the second screw rod 451 rotates under the output of the third driving motor 450, the first movable plate 452 and the second movable plate 453 can move in opposite directions. That is, when the receiving polarizer 420 is close to the sample, the light shield 430 is pulled away from the sample, and at this time, since the distance is sufficient, it is not necessary to block the light path. When the receiving polarizer 420 is away from the sample during detection, the light shield 430 moves in the opposite direction of the receiving polarizer 420, that is, the light shield 430 is closer to the sample, and the light shield 430 blocks and covers the receiving light path of the receiving polarizer 420, thereby improving the receiving accuracy.

[0052] The first driving motor 313 is fixedly connected to one side of the input box 300, the output end of the first driving motor 313 is fixedly connected with a first screw rod 314, the surface of the first screw rod 314 is threadedly connected with a connecting plate 312, the connecting plate 312 is fixedly connected with the input polarizer 310, through the output of the first driving motor 313, the first screw rod 314 is driven to rotate, and then the connecting plate 312 is driven to reciprocate on the surface of the first screw rod 314, so that the input polarizer 310 is synchronously movable, and then the input polarizer 310 is close to or away from the sample according to the detection requirement, and the circularly polarized light is irradiated.

[0053] The input polarizer 310 is connected with an external polarized light input device through an input wire 311, and the receiving polarizer 420 is connected with an external polarized light detection device through a receiving wire 421.

[0054] Specific operation mode: the sample to be detected is placed on the surface of the detection table 110, after being placed, the output control slider 130 in the sliding groove is driven by the electric push rod 120 to slide, so that the detection table 110 is first moved to the irradiation range of the laser emitter 320, the incident laser is emitted by the laser emitter 320, is irradiated on the surface of the sample, and is irradiated on the surface of the receiving plate 410 after being reflected, the incident and irradiation angles are judged by the laser receivers 411 at different positions on the surface of the receiving plate 410, then the relative angle between the input box 300 and the receiving box 400 on the surface of the angle table 200 is adjusted by the cooperation output of the first air cylinder 213 and the second air cylinder 214, until the outgoing laser is irradiated on the surface of the laser receiver 411 at the center position of the receiving plate 410, which represents that the angle adjustment is completed, then the electric push rod 120 continues to output, and the detection table 110 is pushed to the irradiation range of the input polarizer 310 and stopped, at this time, the distance between the input polarizer 310 and the receiving polarizer 420 relative to the sample is adjusted, and the circularly polarized light irradiation and receiving are started, the circularly polarized light emitted by the input polarizer 310 is irradiated on the surface of the sample, and is captured by the receiving polarizer 420 after being reflected on the surface of the sample.

[0055] In the further detection process, when the receiving polarizer 420 needs to be away from the sample for detection, the second screw rod 451 is driven to rotate by the output of the third driving motor 450, under the action of the positive thread and the reverse thread on the surface of the second screw rod 451, the first movable plate 452 and the second movable plate 453 move away from each other, that is, the receiving polarizer 420 moves away from the sample, and the light shield 430 moves close to the sample, the central light path of the receiving polarizer 420 is covered by the light shield 430, the environmental influence is reduced, at the same time, when the light path is detected, the nitrogen gas is output into the light shield 430 through the air pipe 432, and is blown away through the flow guide cavity 434, the rotation of the light shield 430 is matched, and the oxygen, water and other impurities around the light path are inhibited, the influence of environmental factors on the circularly polarized light is further reduced, and the detection precision is improved.

[0056] It should be noted that the above examples are only used to illustrate the technical solutions of the present application but not to limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced, without departing from the spirit and scope of the present application, and all modifications and equivalent replacements should be covered in the scope of the claims of the present application.

Claims

1. A synchronously adjustable circular dichroism spectrometer, characterized by: The utility model relates to a kind of detection device, including: Base (100), the angle table (200) installed on the surface of base (100), input box (300) and receiving box (400) are installed on the angle table (200) near center line both sides, laser emitter (320) and receiving plate (410) are respectively installed on the side of input box (300) and receiving box (400); Input polarizer (310) and receiving polarizer (420) for emitting and receiving circularly polarized light are respectively installed in input box (300) and receiving box (400); Detection table (110) is arranged on the surface of base (100) and used for carrying detected object, detection table (110) is connected with base (100) by carrier mechanism, carrier mechanism is used to drive detection table (110) to reciprocate between the irradiation range of laser emitter (320) and the irradiation range of input polarizer (310);Carrier mechanism includes electric push rod (120) fixedly connected on the surface of base (100), the surface of base (100) is provided with sliding slot, and sliding block (130) is slidably connected in the sliding slot, the output end of electric push rod (120) is fixedly connected with sliding block (130), and detection table (110) is fixedly connected on the top of sliding block (130);Receiving plate (410) is arc-shaped, and a plurality of laser receivers (411) are fixedly connected on the side close to laser emitter (320) of receiving plate (410); Adjusting mechanism is arranged in angle table (200) and used for adjusting the irradiation and receiving angle of input polarizer (310) and receiving polarizer (420); Light shielding mechanism is arranged in receiving box (400) and used for reducing the influence of environment on outgoing circularly polarized light; The receiving center of laser receiver (411) in the center position of receiving plate (410) and receiving polarizer (420) is located on the same parallel line, and the emission point position of laser emitter (320) and the emission center of input polarizer (310) are located on the same parallel line.

2. A synchronously adjustable circular polarization spectroscopy apparatus as in claim 1, wherein: Adjusting mechanism includes first connecting rod (211) and second connecting rod (212) coaxially connected in the inner wall of angle table (200), first connecting rod (211) is connected with base (100) by first air cylinder (213), second connecting rod (212) is connected with base (100) by second air cylinder (214), and the upper end of first connecting rod (211) is fixedly connected with receiving box (400), and the upper end of second connecting rod (212) is fixedly connected with input box (300).

3. A synchronously adjustable circular dichroism spectrometer as claimed in claim 2, wherein: Light shielding mechanism includes light shield (430) sleeved on the surface of receiving polarizer (420), the side, away from receiving plate (410), of receiving box (400) is provided with driving element for moving light shield (430) and receiving polarizer (420) transversely in receiving box (400), and the moving direction of light shield (430) and receiving polarizer (420) is opposite.

4. A synchronously adjustable circular dichroism spectrometer as claimed in claim 3, wherein: The light shield (430) is provided with a sleeve ring (431) on the side close to the inside of the receiving box (400), the sleeve ring (431) is hollow, and the sleeve ring (431) is fixedly connected with an air pipe (432) on one side. The light shield (430) is provided with a plurality of air cavities (433) communicating with the inside of the sleeve ring (431), and the inner wall of the light shield (430) is provided with a plurality of flow guide cavities (434) matched with the air cavities (433) and communicating with the air cavities (433), and the cross section of the flow guide cavity (434) is inclined.

5. A synchronously adjustable circular dichroism spectrometer as claimed in claim 4, wherein: The rotating mechanism for rotating the light shield (430) includes a gear ring (440) fixedly connected to the surface of the light shield (430), a plurality of guide rods (441) fixedly connected to one side of the gear ring (440), the guide rods (441) penetrating the light shield (430), and the gear ring (440) connected to the light shield (430) through a plurality of springs (442). A second driving motor (443) is fixedly connected in the receiving box (400), the output end of the second driving motor (443) is fixedly connected with a gear (444) matched with the gear ring (440), and the light shield (430) is rotatably connected with the sleeve ring (431).

6. A synchronously adjustable circular dichroism spectrometer as claimed in claim 5, wherein: The driving member includes a third driving motor (450) fixedly connected to one side of the receiving box (400), a second screw rod (451) fixedly connected to the output end of the third driving motor (450), a first movable plate (452) and a second movable plate (453) fixedly connected to the surfaces of the receiving polarizer (420) and the sleeve ring (431) respectively, and the first movable plate (452) and the second movable plate (453) are both threadedly connected to the surface of the second screw rod (451), the surface of the second screw rod (451) is provided with a right thread and a reverse thread respectively, and the first movable plate (452) and the second movable plate (453) are correspondingly arranged.

7. A synchronously adjustable circular dichroism spectrometer as claimed in claim 6, wherein: A first driving motor (313) is fixedly connected to one side of the input box (300), a first screw rod (314) is fixedly connected to the output end of the first driving motor (313), and a connecting plate (312) is threadedly connected to the surface of the first screw rod (314).

8. A synchronously adjustable circular dichroism spectrometer as claimed in claim 7, wherein: The input polarizer (310) is connected with an external polarized light input device through an input lead (311), and the receiving polarizer (420) is connected with an external polarized light detection device through a receiving lead (421).

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