A device and method for detecting polarization degree of polarizer

Abstract

The invention discloses a device for detecting the polarization degree of a polarizing film and a detection method thereof, and relates to the technical field of polarizing films. The device comprises a mounting plate, a supporting leg, a polarimeter, a limiting mechanism, a detection mechanism and a shading plate, wherein a fixing frame is fixedly connected to one side of the mounting plate, and supporting legs are arranged at four corners below the fixing frame and the mounting plate, a limiting mechanism is arranged on the upper side of the mounting plate, and a detection mechanism is arranged in the limiting mechanism on the fixing frame, and a first polarizing film and a second polarizing film are detachably arranged on the limiting mechanism and the detection mechanism respectively; a transmission wheel of the device rotates a rotating rod through a transmission plate gear transmission, drives a second bevel gear to rotate, and further drives the adjustment of the rotating bracket and the second polarizing film, the first polarizing film is used as a reference polarizing film, and the second polarizing disc is used as a polarizing film to be tested, the two polarizing films are irradiated by the polarimeter, the second polarizing film is gradually rotated, and the change of light intensity is observed, the change of light intensity at different angles is recorded, and the polarization degree of the polarizing film is calculated.

Description

Technical Field

[0001] The present invention relates to the technical field of polarizers, and in particular to a device for detecting the polarization degree of a polarizer and a detection method thereof. Background Art

[0002] As liquid crystal displays (LCDs) become more popular, people's requirements for LCD performance are also getting higher. LCD imaging must rely on polarized light. All liquid crystal panels have two polarizers, one on top and one on the bottom, attached to the liquid crystal glass, forming a liquid crystal panel with a total thickness of about 1mm. If any polarizer is missing, the liquid crystal panel cannot display images.

[0003] Among them, the polarization degree of the polarizer is the main parameter of the polarizer, as follows:

[0004] Polarization degree: refers to the parameter that describes the ability of the polarizer to convert natural light into linearly polarized light. If the polarization degree of the lower polarizer is low, it means that a large part of the natural light is not converted into linearly polarized light after passing through the polarizer. This part of the natural light can freely pass through the liquid crystal glass and the upper polarizer, which will cause the LCD brightness to increase in the dark state, the contrast to decrease, and the LCM (LCD display module) cannot present a black state. In addition, the polarizers widely used at present are iodine-based polarizers. The PVA (polyvinyl alcohol) of iodine-based polarizers is very sensitive to temperature and humidity. When the temperature and humidity are too high or the storage time is too long, it will cause the iodine ions to be lost, resulting in a decrease in the polarization degree of the iodine-based polarizer;

[0005] The existing polarizer polarization equipment has the following problems:

[0006] 1. Measurement error: Inaccurate positioning of the polarizer or inaccurate angle setting will lead to inaccurate measurement data, thus affecting the final test results.

[0007] 2. Poor stability: The instability of the device may cause deviations in the measurement process, affecting repeatability and reliability.

[0008] 3. Interference: External light interference will reduce the accuracy of the measurement and make the test results unreliable.

[0009] Therefore, those skilled in the art provide a device for detecting the polarization degree of a polarizer and a detection method thereof to solve the problems raised in the above background technology. Summary of the invention

[0010] The object of the present invention is to provide a device for detecting the polarization degree of a polarizer and a detection method thereof, so as to solve the problems raised in the above background technology.

[0011] To achieve the above object, the present invention provides the following technical solutions:

[0012] A device based on detecting the polarization degree of a polarizer comprises a mounting plate, supporting legs, a polarimeter, a limiting mechanism, a detecting mechanism and a shading plate, wherein a fixing frame is fixedly connected to one side of the mounting plate, supporting legs are arranged at the fixing frame and the four corners below the mounting plate, a limiting mechanism is arranged on the upper side of the mounting plate, and a detecting mechanism is arranged in the limiting mechanism of the fixing frame, and a first polarizer and a second polarizer are detachably arranged on the limiting mechanism and the detecting mechanism respectively.

[0013] As a further solution of the present invention: the limiting mechanism includes a detection seat, a shift block, an adjustment groove, a limit block, a reset spring, a limit plate and a detection hole, the detection seat is fixedly connected to the upper side of the mounting plate, the detection seat is respectively provided with adjustment grooves on both sides, and a placement groove is provided in the detection seat, the placement groove is slidably connected with a limit plate, a shift block is provided on the side of the limit plate away from the placement groove, and reset springs are fixedly connected on both sides of the limit plate, and the reset spring is fixedly connected to the surface of the placement groove on the side away from the limit plate.

[0014] As a further solution of the present invention: limit blocks are symmetrically arranged in the placement groove, the limit blocks and the limit plates cooperate with each other, and the detection seat is provided with a detection hole on the surface of the mounting plate, the upper side of the detection seat is symmetrically fixedly connected with a lifting rod, and the side of the lifting rod away from the detection seat is fixedly connected with a polarimeter, and the position of the polarimeter and the detection hole cooperates with each other.

[0015] As a further solution of the present invention: protrusions are symmetrically arranged on both sides of the limit plate away from the shifting block, the detection hole is detachably installed with a first polarizer through the protrusions, and a shading plate is fixedly connected to the mounting plate on one side of the detection seat.

[0016] As a further solution of the present invention: the detection mechanism includes a transmission frame, a first bevel gear, a transmission plate, a second bevel gear, a limit groove, a sliding block, a dial, a rotating bracket, an adjusting knob, a damping spring, a threaded rod, a fixed knob, a rotating rod and a transmission wheel. The transmission frame is symmetrically arranged in the detection seat, and the detection seat is movably connected to the transmission plate through the adjusting groove, the sliding block is slidably connected to one side of the fixed frame, the side of the transmission plate away from the detection seat is located on the sliding block, a fixed knob is arranged on one side of the sliding block, and the sliding block is movably connected to the fixed frame through the fixed knob.

[0017] As a further solution of the present invention: a limit groove is provided on the upper surface of the transmission plate, and an adjusting knob is movably connected to the sliding block and the detection seat, and the adjusting knob cooperates with the limit groove.

[0018] As a further solution of the present invention: a rack structure is provided on the surface of the transmission plate on one side, and a rotating rod is movably connected in the transmission frame, a transmission wheel is fixedly connected to the rotating rod, a second bevel gear is fixedly connected to one side of the transmission wheel, a first bevel gear is movably connected in the transmission frame, the gears between the first bevel gear and the second bevel gear are meshed with each other, and the gears between the transmission wheel and the transmission plate are meshed with each other.

[0019] As a further solution of the present invention: a rotating bracket is fixedly connected to one side of the second bevel gear in the detection hole, and the rotating bracket cooperates with the second polarizer. An adjusting knob is movably connected to one side of the fixed bracket, and a threaded rod is fixedly connected to one side of the adjusting knob. The threads of the threaded rod and the sliding block cooperate with each other, and a damping spring is sleeved on the threaded rod between the sliding block and the adjusting knob.

[0020] As a further solution of the present invention: a scale plate is provided on the upper surface of the fixing frame, and the scale plate and the sliding block are matched with each other in position.

[0021] A detection method based on a device for detecting the polarization degree of a polarizer, comprising the following steps:

[0022] S1: Place the first polarizer and the second polarizer on the limit mechanism and the detection mechanism respectively, install and adjust them correctly, and set the adjustment knob and dial in the detection mechanism to the initial state;

[0023] S2: Start the shading plate to reduce the interference of external light on the test results and ensure that the light conditions of the measurement environment are stable;

[0024] S3: irradiating the first polarizer and the second polarizer through a polarimeter, gradually rotating the second polarizer through a detection mechanism, and recording changes in light intensity at different angles, the angle range is from 0 degrees to 180 degrees, and the angle can be subdivided as needed;

[0025] S4: Record the light intensity data at each angle, draw an image of light intensity versus angle, and calculate the maximum and minimum values ​​of light intensity based on the light intensity change image;

[0026] S5: Compare the calculated polarization degree value with the standard value, analyze the polarization performance of the polarizer to be tested, compare the polarization degrees of different samples, and perform performance evaluation or quality control;

[0027] S6: If a large deviation is found in the measurement results, check whether the equipment is adjusted accurately, including checking the alignment and angle setting of the first polarizer and the second polarizer, and readjust and calibrate the equipment as needed.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. By moving the shifting block, the reset spring in the adjustment slot is stressed, so that the limit plate can accurately adjust the position to ensure the accurate alignment of the first polarizer. The setting of the limit block and the shifting block makes the positioning of the first polarizer in the placement slot more stable and accurate. The reset spring provides a stable reset function to ensure that the limit plate can be restored to the initial position during the adjustment process to reduce errors. The coordinated work of the limit mechanism and the detection mechanism can quickly and accurately detect the polarization degree of the polarizer and improve the detection efficiency. The shading plate effectively reduces the influence of external light on the detection results and improves the accuracy of the detection. Through precise adjustment, stable positioning and effective light management, efficient and accurate detection of the polarizer is achieved;

[0030] 2. The transmission plate is connected to the transmission frame through the adjustment slot, and the sliding block is fixed to the fixed frame through the fixing knob to ensure the stability of the transmission plate. When the angle of the second polarizer needs to be adjusted, the knob is adjusted through the knob. The adjusting knob can drive the threaded rod to rotate, so that the threaded rod drives the sliding block to move horizontally. The transmission wheel rotates the rotating rod through the transmission plate gear transmission, thereby driving the second bevel gear to rotate. The first bevel gear and the second bevel gear are meshed with each other, thereby driving the adjustment of the rotating bracket and the second polarizer, and the position is accurately set through the scale code on the dial and the adjustment knob. The first polarizer is used as the reference polarizer, and the second polarizer disc is the polarizer to be tested. The two polarizers are irradiated by the polarimeter, and the second polarizer is gradually rotated. The change in light intensity is observed, the change in light intensity at different angles is recorded, and the polarization degree of the polarizer is calculated. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The present invention is a schematic structural diagram of a device for detecting the polarization degree of a polarizer and a detection method thereof.

[0032] Figure 2 The present invention is a side view of a detection seat in a device for detecting the polarization degree of a polarizer and a detection method thereof.

[0033] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure along the AA direction.

[0034] Figure 4 The present invention is a schematic structural diagram of a limiting mechanism in a device for detecting the polarization degree of a polarizer and a detection method thereof.

[0035] Figure 5 The present invention is a schematic diagram of the structure of a fixing frame in a device for detecting the polarization degree of a polarizer and a detection method thereof.

[0036] Figure 6 The present invention is a schematic diagram of the structure of a detection mechanism in a device for detecting the polarization degree of a polarizer and a detection method thereof.

[0037] Figure 7The present invention is a schematic diagram of the matching of the first bevel gear and the second bevel gear in a detection mechanism based on a device for detecting the polarization degree of a polarizer and a detection method thereof.

[0038] In the figure: 1. mounting plate; 2. supporting leg; 3. polarimeter; 4. limiting mechanism; 401. detection seat; 402. shift block; 403. adjusting slot; 404. limiting block; 405. reset spring; 406. limiting plate; 407. detection hole; 408. placement slot; 5. detection mechanism; 501. transmission frame; 502. first bevel gear; 503. transmission plate; 504. second bevel gear; 505. limiting slot; 506. sliding block; 507. dial; 508. rotating bracket; 509. adjusting knob; 510. damping spring; 511. threaded rod; 512. fixing knob; 513. rotating rod; 514. transmission wheel; 6. sunshade; 7. lifting rod; 8. first polarizer; 9. second polarizer; 10. fixing frame. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Example 1

[0041] Reference Figure 1-Figure 4 This embodiment provides a device for detecting polarization degree of a polarizer, including a mounting plate 1, a supporting leg 2, a polarimeter 3, a limiting mechanism 4, a detecting mechanism 5 and a shading plate 6. A fixing frame 10 is fixedly connected to one side of the mounting plate 1. The fixing frame 10 and the four corners below the mounting plate 1 are provided with supporting legs 2. A limiting mechanism 4 is installed on the upper side of the mounting plate 1, and a detecting mechanism 5 is installed in the limiting mechanism 4 of the fixing frame 10. A first polarizer 8 and a second polarizer 9 are detachably provided on the limiting mechanism 4 and the detecting mechanism 5, respectively.

[0042] In this embodiment, specifically, the limiting mechanism 4 includes a detection seat 401, a shift block 402, an adjustment slot 403, a limit block 404, a reset spring 405, a limit plate 406 and a detection hole 407. The detection seat 401 is fixedly connected to the upper side of the mounting plate 1, and the adjustment slots 403 are respectively penetrated on both sides of the detection seat 401, and a placement slot 408 is opened in the detection seat 401, and the limit plate 406 is slidably connected in the placement slot 408. The shift block 402 is provided on the side of the limit plate 406 away from the placement slot 408, and the reset springs 405 are fixedly connected on both sides of the limit plate 406, and the reset spring 405 is fixedly connected to the surface of the placement slot 408 on the side away from the limit plate 406;

[0043] The positioning block 404 is symmetrically arranged in the placement groove 408, and the positioning block 404 cooperates with the positioning plate 406, and the detection seat 401 is provided with a detection hole 407 on the surface of the mounting plate 1, and the upper side of the detection seat 401 is symmetrically fixedly connected with a lifting rod 7, and the side of the lifting rod 7 away from the detection seat 401 is fixedly connected with a polarimeter 3, and the position of the polarimeter 3 and the detection hole 407 cooperates with each other;

[0044] The two sides of the limit plate 406 are symmetrically provided with protrusions on one side away from the shifting block, and the detection hole 407 is detachably mounted with a first polarizer 8 through the protrusions, and the mounting plate 1 is fixedly connected with a shading plate 6 on one side of the detection seat 401;

[0045] By moving the dial block 402, the return spring 405 in the adjustment slot 403 is stressed, so that the limit plate 406 can accurately adjust the position to ensure the accurate alignment of the first polarizer 8. The setting of the limit block 404 and the dial block 402 makes the positioning of the first polarizer 8 in the placement slot 408 more stable and accurate. The return spring 405 provides a stable reset function to ensure that the limit plate 406 can return to the initial position during the adjustment process to reduce errors. The coordinated work of the limit mechanism 4 and the detection mechanism 5 can quickly and accurately detect the polarization degree of the polarizer and improve the detection efficiency. The shading plate 6 effectively reduces the influence of external light on the detection results and improves the accuracy of the detection. Through precise adjustment, stable positioning and effective light management, efficient and accurate detection of the polarizer is achieved.

[0046] Example 2

[0047] Reference Figure 5-Figure 7 , this embodiment is based on the previous embodiment, and is different from the previous embodiment in that the detection mechanism 5 includes a transmission frame 501, a first bevel gear 502, a transmission plate 503, a second bevel gear 504, a limiting groove 505, a sliding block 506, a dial 507, a rotating bracket 508, an adjusting knob 509, a damping spring 510, a threaded rod 511, a fixed knob 512, a rotating rod 513 and a transmission wheel 514, the transmission frame 501 is symmetrically arranged in the detection seat 401, and the detection seat 401 is movably connected to the transmission plate 503 through the adjusting groove 403, the sliding block 506 is slidably connected to one side of the fixed frame 10, the side of the transmission plate 503 away from the detection seat 401 is located on the sliding block 506, a fixed knob 512 is arranged on one side of the sliding block 506, and the sliding block 506 is movably connected to the fixed frame 10 through the fixed knob 512;

[0048] The transmission plate 503 has a limit groove 505 on its upper surface, and the sliding block 506 and the detection seat 401 are both movably connected with an adjustment knob 509, and the adjustment knob 509 cooperates with the limit groove 505;

[0049] A rack structure is provided on the surface of the transmission plate 503 on one side, and a rotating rod 513 is movably connected in the transmission frame 501, and a transmission wheel 514 is fixedly connected to the rotating rod 513. A second bevel gear 504 is fixedly connected to one side of the transmission wheel 514, and a first bevel gear 502 is movably connected in the transmission frame 501. The first bevel gear 502 and the second bevel gear 504 are meshed with each other, and the gears between the transmission wheel 514 and the transmission plate 503 are meshed with each other.

[0050] A rotating bracket 508 is fixedly connected to one side of the second bevel gear 504 in the detection hole 407, and the rotating bracket 508 cooperates with the second polarizer 9. An adjusting knob 509 is movably connected to one side of the fixing frame 10, and a threaded rod 511 is fixedly connected to one side of the adjusting knob 509. The threads of the threaded rod 511 and the sliding block 506 cooperate with each other, and a damping spring 510 is sleeved on the threaded rod 511 between the sliding block 506 and the adjusting knob 509.

[0051] A scale plate 507 is provided on the upper surface of the fixing frame 10, and the scale plate 507 and the sliding block 506 are matched with each other;

[0052] The transmission plate 503 is connected to the transmission frame 501 through the adjustment slot 403, and the sliding block 506 is fixed to the fixing frame 10 through the fixing knob 512 to ensure the stability of the transmission plate 503. When the angle of the second polarizer 9 needs to be adjusted, the knob 509 is adjusted by turning the knob. The adjusting knob 509 can drive the threaded rod 511 to rotate, so that the threaded rod 511 drives the sliding block 506 to move horizontally, and the transmission wheel 514 drives the rotating rod 513 to rotate through the transmission plate 503 gear transmission, thereby driving the second polarizer 9. The second bevel gear 504 rotates, the first bevel gear 502 meshes with the second bevel gear 504, and then drives the rotation bracket 508 and the second polarizer 9 to adjust, and the position is accurately set by the scale code on the dial 507 and the adjustment knob 509. The first polarizer 8 is used as a reference polarizer, and the second polarizer disk 9 is the polarizer to be tested. The two polarizers are irradiated by the polarimeter 3, and the second polarizer 9 is gradually rotated, and the change of light intensity is observed, and the change of light intensity at different angles is recorded, and the polarization degree of the polarizer is calculated;

[0053] The detection mechanism 5 provides a precise adjustment function to ensure the accurate alignment of the second polarizer 9 and the first polarizer 8 during the detection process. The cooperation of the adjustment knob 509 and the damping spring 510 increases the stability and consistency of the adjustment and reduces the error caused by the adjustment. The dial 507 makes the position adjustment more intuitive and accurate, thereby improving the reliability and efficiency of the overall detection.

[0054] Example 3

[0055] A detection method based on a device for detecting the polarization degree of a polarizer, comprising the following steps:

[0056] S1: Place the first polarizer 8 and the second polarizer 9 on the limiting mechanism 4 and the detection mechanism 5 respectively, install and adjust them correctly, and set the adjustment knob 509 and the dial 507 in the detection mechanism 5 to the initial state;

[0057] S2: Start the light shielding plate 6 to reduce the interference of external light on the detection results and ensure that the light conditions of the measurement environment are stable;

[0058] S3: irradiating the first polarizer 8 and the second polarizer 9 through the polarimeter 3, gradually rotating the second polarizer 9 through the detection mechanism 5, and recording the light intensity changes at different angles, the angle range is from 0 degrees to 180 degrees, and the angle can be subdivided as needed;

[0059] S4: Record the light intensity data at each angle, draw an image of light intensity versus angle, and calculate the maximum and minimum values ​​of light intensity based on the light intensity change image;

[0060] S5: Compare the calculated polarization degree value with the standard value, analyze the polarization performance of the polarizer to be tested, compare the polarization degrees of different samples, and perform performance evaluation or quality control;

[0061] S6: If a large deviation is found in the measurement result, check whether the adjustment of the equipment is accurate, including detecting the alignment and angle setting of the first polarizer 8 and the second polarizer 9, and readjusting and calibrating the equipment as needed.

[0062] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0063] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A device for detecting the polarization degree of a polarizer, characterized in that: The device comprises a mounting plate (1), a supporting leg (2), a polarimeter (3), a limiting mechanism (4), a detection mechanism (5) and a shading plate (6); one side of the mounting plate (1) is fixedly connected to a fixing frame (10); four corners below the fixing frame (10) and the mounting plate (1) are provided with supporting legs (2); a limiting mechanism (4) is installed on the upper side of the mounting plate (1); the fixing frame (10) is provided with a detection mechanism (5) inside the limiting mechanism (4); and a first polarizer (8) and a second polarizer (9) are detachably provided on the limiting mechanism (4) and the detection mechanism (5), respectively; The limiting mechanism (4) comprises a detection seat (401), a shifting block (402), an adjustment slot (403), a limiting block (404), a reset spring (405), a limiting plate (406) and a detection hole (407); the detection seat (401) is fixedly connected to the upper side of the mounting plate (1); the adjustment slots (403) are respectively provided on both sides of the detection seat (401); a placement slot (408) is provided in the detection seat (401); the limiting plate (406) is slidably connected in the placement slot (408); a shifting block (402) is provided on a side of the limiting plate (406) away from the placement slot (408); the reset springs (405) are fixedly connected to both sides of the limiting plate (406); and the side of the reset spring (405) away from the limiting plate (406) is fixedly connected to the surface of the placement slot (408); A limit block (404) is symmetrically arranged in the placement groove (408), the limit block (404) and the limit plate (406) cooperate with each other, and the detection seat (401) is provided with a detection hole (407) on the surface of the mounting plate (1), the upper side of the detection seat (401) is symmetrically fixedly connected with a lifting rod (7), and the side of the lifting rod (7) away from the detection seat (401) is fixedly connected with a polarimeter (3), the position of the polarimeter (3) and the detection hole (407) cooperate with each other, and protrusions are symmetrically arranged on both sides of the limit plate (406) away from the shifting block, and the detection hole (407) is detachably installed with a first polarizer (8) through the protrusions, and the mounting plate (1) is fixedly connected with a shading plate (6) on one side of the detection seat (401); The detection mechanism (5) comprises a transmission frame (501), a first bevel gear (502), a transmission plate (503), a second bevel gear (504), a limiting groove (505), a sliding block (506), a dial (507), a rotating bracket (508), an adjusting knob (509), a damping spring (510), a threaded rod (511), a fixed knob (512), a rotating rod (513) and a transmission wheel (514); the transmission frame (501) is symmetrically arranged in the detection seat (401); the detection seat (401) is movably connected to the transmission plate (503) via the adjusting groove (403); the sliding block (506) is slidably connected to one side of the fixed frame (10); a side of the transmission plate (503) away from the detection seat (401) is located on the sliding block (506); a fixed knob (512) is arranged on one side of the sliding block (506); and the sliding block (506) is movably connected to the fixed frame (10) via the fixed knob (512); The transmission plate (503) has a limit groove (505) on its upper surface, and the sliding block (506) and the detection seat (401) are both movably connected with an adjustment knob (509), and the adjustment knob (509) and the limit groove (505) cooperate with each other; A rack structure is provided on the surface of the transmission plate (503) on one side, and a rotating rod (513) is movably connected inside the transmission frame (501), a transmission wheel (514) is fixedly connected to the rotating rod (513), a second bevel gear (504) is fixedly connected to one side of the transmission wheel (514), a first bevel gear (502) is movably connected inside the transmission frame (501), the gears between the first bevel gear (502) and the second bevel gear (504) are meshed with each other, and the gears between the transmission wheel (514) and the transmission plate (503) are meshed with each other; One side of the second bevel gear (504) is fixedly connected to a rotating bracket (508) in the detection hole (407), and the rotating bracket (508) and the second polarizer (9) cooperate with each other. One side of the fixed frame (10) is movably connected to an adjusting knob (509), and one side of the adjusting knob (509) is fixedly connected to a threaded rod (511), and threads of the threaded rod (511) and the sliding block (506) cooperate with each other, and a damping spring (510) is sleeved on the threaded rod (511) between the sliding block (506) and the adjusting knob (509), and a dial (507) is provided on the upper surface of the fixed frame (10), and the positions of the dial (507) and the sliding block (506) cooperate with each other.

2. A detection method based on a device for detecting polarization degree of a polarizer according to claim 1, characterized in that: The steps include: S1: placing the first polarizer (8) and the second polarizer (9) on the limiting mechanism (4) and the detection mechanism (5), respectively, and correctly installing and adjusting them, and setting the adjustment knob (509) and the dial (507) in the detection mechanism (5) to an initial state; S2: Activate the light shielding plate (6) to reduce the interference of external light on the detection results and ensure that the light conditions of the measurement environment are stable; S3: irradiating the first polarizer (8) and the second polarizer (9) through the polarimeter (3), gradually rotating the second polarizer (9) through the detection mechanism (5), and recording the changes in light intensity at different angles, the angle range being from 0 degrees to 180 degrees, and the angle can be subdivided as needed; S4: Record the light intensity data at each angle, draw an image of light intensity versus angle, and calculate the maximum and minimum values ​​of light intensity based on the light intensity change image; S5: Compare the calculated polarization degree value with the standard value, analyze the polarization performance of the polarizer to be tested, compare the polarization degrees of different samples, and perform performance evaluation or quality control; S6: If a large deviation is found in the measurement result, check whether the adjustment of the equipment is accurate, including checking the alignment and angle setting of the first polarizer (8) and the second polarizer (9), and readjust and calibrate the equipment as needed.

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