Device for measuring refractive index of glue

Abstract

The utility model discloses a glue refractive index measuring device which comprises a base, a glass container is arranged on the base, supporting rods are arranged on the two sides of the glass container respectively, lifting connecting plates are arranged on the supporting rods respectively, rotatable measuring pointers are arranged on the connecting plates respectively, a light source is connected to one measuring pointer, and the light source is connected to the other measuring pointer. The other measuring pointer is connected with a power meter, and the connecting plate connected with the power meter is provided with a range finder. The angle of the light source entering the glass container can be conveniently adjusted through the measuring pointer and the liftable connecting plate, the power meter receives a light path emitted out of the glass container, and operation is easy and convenient; the variable quantity of the light path in the vertical direction before and after the glue is filled can be conveniently measured through the range finder, so that the refractive index of the glue is obtained, and the measurement efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of refractive index measurement, in particular to a device for measuring the refractive index of glue. Background Art

[0002] Transparent glue is widely used in scientific experiments and product manufacturing. The optical properties of glue have a significant impact on the results of scientific experiments and the optical transparency of products. Refractive index is a key optical parameter of transparent glue. Accurate quantitative testing of it helps to better understand the optical properties of the glue used and better complete scientific experiments and product manufacturing.

[0003] The refractive index of glue has a significant impact on the transmission path and transmittance of light. When designing and manufacturing optical components, the refractive index of glue usually needs to be considered. Selecting glue with a refractive index close to that of the optical material can reduce the reflectivity of light at the interface between the material and the glue, thereby improving the transmittance of light to a certain extent. In addition, there is often a certain gap between the refractive index of the liquid glue and the refractive index of the glue after curing, which needs to be tested according to actual application. Therefore, it is extremely important to design a device for quantitatively detecting the refractive index of the liquid glue and the refractive index of the glue after curing. Summary of the Invention

[0004] The purpose of the utility model is to address the problems existing in the prior art and provide a device for measuring the refractive index of glue. The utility model has a simple structural design and can conveniently measure the refractive index of liquid glue and after curing.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A device for measuring the refractive index of glue includes a base, a glass container is provided on the base, support rods are provided on both sides of the glass container, each support rod is provided with a liftable connecting plate, each connecting plate is provided with a rotatable measuring pointer, one of the measuring pointers is connected to a light source, the other measuring pointer is connected to a power meter, and a rangefinder is provided on the connecting plate connected to the power meter.

[0007] In the above technical solution, the measuring pointer and the liftable connecting plate facilitate adjustment of the angle at which the light source enters the glass container, and the power meter receives the light path exiting the glass container, resulting in simple and convenient operation. The rangefinder can conveniently measure the vertical change in the light path before and after the glue is added, thereby obtaining the refractive index of the glue, thereby improving measurement efficiency.

[0008] Furthermore, a fastening ring is connected to the side of the connecting plate away from the measuring pointer, and the connecting plate is sleeved on the support rod through the fastening ring. The connecting plate can be raised and lowered by the fastening ring, which facilitates adjustment of the positions of the light source, the power meter, and the rangefinder.

[0009] Furthermore, the connecting plate is an arc-shaped plate with a central angle of not less than 90°, and one end of the measuring pointer is connected to the center of the connecting plate. Providing the connecting plate as an arc-shaped plate and connecting one end of the measuring pointer to the center of the circular plate reduces manufacturing costs compared to other plate shapes.

[0010] Furthermore, the connecting plate is provided with a scale corresponding to the central angle of the circle, through which the angle between the measuring pointer and the horizontal direction can be directly read, thereby improving measurement efficiency.

[0011] Furthermore, the glass container is provided with a cover plate to prevent the glue in the glass container from overflowing.

[0012] Furthermore, the direction of the light emitted by the light source is consistent with the length direction of the measuring pointer. By keeping the direction of the light emitted by the light source consistent with the length direction of the measuring pointer, the accuracy of measuring the angle between the light emitted and the horizontal direction is ensured, and the measurement error is reduced.

[0013] Furthermore, the measuring pointer is provided with a connecting rod, and the measuring pointer is connected to the measuring angle plate via the connecting rod, and the rotation and fixation of the measuring pointer are achieved via the connecting rod.

[0014] Furthermore, the rangefinder is a laser rangefinder, and is located on the side of the connecting plate facing away from the measuring pointer. The rangefinder can conveniently measure the displacement of the connecting plate, improving measurement efficiency. Being located on the side of the connecting plate facing away from the measuring pointer avoids obstructing the rotation of the measuring pointer.

[0015] Furthermore, the connecting plate is further provided with a guide rod on one side close to the support rod, so as to prevent the connecting plate from deflecting when being lifted or lowered.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The measuring pointer and the liftable connecting plate facilitate adjustment of the angle of the light source entering the glass container, as well as the light path received by the power meter leaving the glass container. Operation is simple and convenient. The distance meter can conveniently measure the vertical change in the light path before and after the glue is added, and then obtain the refractive index of the glue, thereby improving measurement efficiency.

[0018] 2. The angle between the measuring pointer and the horizontal direction can be directly read through the scale, which improves measurement efficiency.

[0019] 3. The distance meter can be used to conveniently measure the displacement of the connecting plate, thereby improving the measurement efficiency. It is set on the side of the connecting plate away from the measuring pointer to avoid obstructing the rotation of the measuring pointer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a front view of a device for measuring the refractive index of glue according to the present invention;

[0021] Figure 2 This is a top view of a device for measuring the refractive index of glue according to the present invention;

[0022] Figure 3 This is a light path diagram of a device for measuring the refractive index of glue according to the utility model.

[0023] In the figure: 1. Base; 2. Glass container; 3. Support rod; 4. Connecting plate; 5. Measuring pointer; 6. Light source; 7. Power meter; 8. Rangefinder; 9. Fastening ring; 10. Connecting rod; 11. Cover plate; 12. Guide rod; 13. Guide ring. DETAILED DESCRIPTION

[0024] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "middle", "upper", "lower", "left", "right", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0026] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0027] The following combination Figures 1 to 3 , through specific embodiments and application scenarios, a device for measuring the refractive index of glue provided by an embodiment of the utility model is described in detail.

[0028] A device for measuring the refractive index of glue includes a base 1, a glass container 2 is provided on the base 1, support rods 3 are provided on both sides of the glass container 2, each support rod 3 is provided with a liftable connecting plate 4, each connecting plate 4 is provided with a rotatable measuring pointer 5, one measuring pointer 5 is connected to a light source 6, the other measuring pointer 5 is connected to a power meter 7, and a distance meter 8 is provided on the connecting plate 4 connected to the power meter 7.

[0029] It should be noted that the measuring principle of this measuring device is as follows. Figure 3 As shown, the outgoing light path of light source 6 enters glass container 2 at a certain angle to the horizontal. The light path passes through glass container 2 and the air or glue inside the container before exiting glass container 2 and being received by power meter 7 located on one side of glass container 2. The refractive index of the glue is obtained by measuring the height difference between the power meter 7 and the position before and after the glue is added to the glass container 2. Specifically, light source 6 emits the outgoing light at an angle a1 to the horizontal. The refractive angle of the light path after passing through glass container 2 is a2. Since the refractive index of the glass container is known to be n1 and the refractive index of air is 1, the law of refraction yields Formula 1: .

[0030] After the glue is added, the incident angle of the light path passing through the side wall of the glass container 2 and entering the internal cavity is a2, and the refraction angle is a3. According to the law of refraction, formula 2 is obtained: .

[0031] When the light path propagates in the glue in the inner cavity of the glass container 2, the vertical change between the injection point and the injection point is D2, and the width d of the inner cavity of the glass container 2 is known, and we can get , combined with the above formula 1 and formula 2, we get: .

[0032] When no glue is added, the glass container 2 is filled with air, and the vertical change value of the exit point and the entry point of the light path in the glass container 2 is obtained. .

[0033] When the light path exits the glass container 2, the difference in vertical change between the exit point and the entry point before and after the glue is added is , after simplifying the formula, we can get the refractive index of the glue as .

[0034] like Figure 1 and Figure 2As shown, a glass container 2 is fixedly connected to a base 1. Two support rods 3 are symmetrically fixedly connected to the glass container 2 on either side. Each support rod 3 is provided with a lifting and lowering connecting plate 4. Both connecting plates 4 are provided with a rotatable measuring pointer 5. A light source 6 is fixedly connected to one of the measuring pointers 5. By rotating the measuring pointer 5, the emitted light from the light source 6 can be directed into the glass container 2 at different angles relative to the horizontal. A power meter 7 is fixedly connected to the other measuring pointer 5. Because the light path exiting the glass container 2 is parallel to the light path entering the glass container 2, rotating the measuring pointer 5 allows the power meter 7 to receive the light path exiting the glass container 2. The position of the power meter 7 can be adjusted by adjusting the lifting and lowering of the connecting plate 4. A distance meter 8 is fixedly connected to the connecting plate 4 provided with the power meter 7. The distance meter 8 is located on the other side of the connecting plate 4 away from the measuring pointer 5. Since the vertical change ΔD of the two light paths in the glass container 2 remains unchanged after exiting the glass container 2, after the power meter 7 receives the two light paths respectively, the distance L1 and L2 between the power meter 7 and the base 1 are respectively measured by the distance meter 8, thereby obtaining the change ΔD=D1-D2=L1-L2. The measurement data can be obtained conveniently and substituted into the formula to obtain the refractive index of the glue, thereby improving the measurement efficiency.

[0035] Further, if Figure 1 As shown, a fastening ring 9 is fixedly connected to the side of the connecting plate 4 away from the measuring pointer 5. The connecting plate 4 is sleeved on the support rod 3 through the fastening ring 9. A fastening bolt is provided on the fastening ring 9. The fastening bolt can be rotated to achieve the loose state of the fastening ring 9, thereby realizing the lifting and lowering of the connecting plate 4 on the support rod 3. The connecting plate 4 can be raised and lowered by the fastening ring 9, which is convenient for adjusting the positions of the light source 6, power meter 7 and rangefinder 8.

[0036] Further, if Figure 1 As shown, the connecting plate 4 is an arc-shaped plate with a central angle of not less than 90°, and one end of the measuring pointer 5 is connected to the center of the connecting plate 4. Preferably, the connecting plate 4 is an arc-shaped plate with a central angle of 90°. Setting the connecting plate 4 as an arc-shaped plate and connecting one end of the measuring pointer 5 to the center of the arc-shaped plate reduces manufacturing costs compared to other plate shapes.

[0037] Further, if Figure 1 As shown, a scale corresponding to the central angle of the arc plate is provided on the connecting plate 4. One side of the connecting plate 4 is kept in a horizontal position and the scale of the horizontal side is set to 0°. The angle between the measuring pointer 5 and the horizontal direction can be directly read through the scale, thereby improving measurement efficiency.

[0038] Further, if Figure 1As shown, a cover plate 11 is provided on the glass container 2. The material of the cover plate 11 is consistent with that of the glass container 2 to avoid damage to the glass container 2 due to different thermal expansion coefficients of different materials during thermal curing of the glue. The cover plate 11 prevents the glue in the glass container 2 from overflowing.

[0039] Furthermore, if Figure 1 As shown, the direction of the light emitted by the light source 6 is consistent with the length direction of the measuring pointer 5. The direction of the light emitted by the light source 6 is consistent with the length direction of the measuring pointer 5, which ensures the accuracy of measuring the emission angle of the light source 6 and reduces measurement errors.

[0040] Furthermore, if Figure 1 As shown, a connecting rod 10 is provided on the measuring pointer 5, and the measuring pointer 5 is connected to the connecting plate 4 through the connecting rod 10. Preferably, the connecting rod 10 is a screw, and a nut is fixed on the other side of the connecting plate 4. The rotation and fixation of the measuring pointer 5 are achieved through the tightening effect of the connecting rod 10.

[0041] Furthermore, if Figure 2 As shown, the distance meter 8 is a laser distance meter, and the distance meter 8 is located on the side of the connecting plate 4 away from the measuring pointer 5. The distance meter 8 can conveniently measure the displacement of the connecting plate 4, thereby improving the measurement efficiency.

[0042] Furthermore, if Figure 1 and Figure 2 As shown, the connecting plate 4 is further provided with a guide rod 12 on the side close to the support rod 3. The guide rod 12 is located on one side of the support rod 3. A guide ring 13 is fixedly connected to the connecting plate 4. The connecting plate 4 is sleeved on the guide rod 12 through the guide ring 13. The guide rod 12 has the same size as the support rod 3 and is arranged in the same plane. The guide rod 12 prevents the connecting plate 4 from shifting during lifting and lowering, so that the power meter 7 receives the light emitted by the light source 6.

[0043] When using this measuring device, rotate the measuring pointer 5 equipped with the light source 6 so that the light path makes an angle a1 with the horizontal direction and enters the glass container 2, and fix the position of the light source 6 at this time by the fastening ring 9 and the connecting rod 10. Adjust the measuring pointer 5 equipped with the power meter 7 so that the angle of the measuring pointer 5 with the horizontal direction is a1, and lift the connecting plate 4 so that the power meter 7 receives the light path emitted from the glass container 2, and fix the position of the power meter 7 at this time by the fastening ring 9 and the connecting rod 10, and read the value L1 of the rangefinder 8 at this time. Open the cover 11, load the glue and cover the cover 11, and adjust the connecting plate 4 equipped with the power meter 7 by lifting and lowering so that the power meter 7 receives the light path at this moment, and read the value L2 of the rangefinder 8 at this moment. By calculating, ΔD=D1-D2=L1-L2 is obtained, and the refractive index n of the glue is obtained. 胶After measuring the refractive index of the glue in its liquid state, the glue is cured using a suitable curing method based on its characteristics. The connecting plate 4, equipped with the power meter 7, is adjusted again to receive the optical path and obtain the value L3 of the rangefinder 8 at this time. From this, ΔD = L1 - L3 can be obtained. Substituting this into the corresponding calculation formula, the refractive index of the glue after curing is obtained. The present utility model can accurately measure the refractive index of the glue in its liquid state and after curing, with simple and convenient operation and a simple structure, thereby improving measurement efficiency.

[0044] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for measuring the refractive index of glue, characterized in that: The invention comprises a base (1), wherein a glass container (2) is provided on the base (1), support rods (3) are provided on both sides of the glass container (2), each support rod (3) is provided with a liftable connecting plate (4), each connecting plate (4) is provided with a rotatable measuring pointer (5), one measuring pointer (5) is connected to a light source (6), the other measuring pointer (5) is connected to a power meter (7), and a distance meter (8) is provided on the connecting plate (4) connected to the power meter (7).

2. The device for measuring the refractive index of glue according to claim 1, characterized in that: A fastening ring (9) is connected to the side of the connecting plate (4) away from the measuring pointer (5), and the connecting plate (4) is sleeved on the support rod (3) via the fastening ring (9).

3. The device for measuring the refractive index of glue according to claim 1, characterized in that: The connecting plate (4) is an arc-shaped plate with a central angle of not less than 90°, and one end of the measuring pointer (5) is connected to the center of the connecting plate (4).

4. The device for measuring the refractive index of glue according to claim 3, characterized in that: The connecting plate (4) is provided with a scale corresponding to the central angle of the circle.

5. The device for measuring the refractive index of glue according to claim 1, characterized in that: A cover plate (11) is provided on the glass container (2).

6. The device for measuring the refractive index of glue according to claim 1, characterized in that: The direction of the emitted light from the light source (6) is consistent with the length direction of the measuring pointer (5).

7. The device for measuring the refractive index of glue according to claim 1, characterized in that: A connecting rod (10) is provided on the measuring pointer (5), and the measuring pointer (5) is connected to the connecting plate (4) via the connecting rod (10).

8. The device for measuring the refractive index of glue according to claim 1, characterized in that: The distance meter (8) is a laser distance meter, and the distance meter (8) is located on a side of the connecting plate (4) facing away from the measuring pointer (5).

9. The device for measuring the refractive index of glue according to claim 1, characterized in that: The connecting plate (4) is further provided with a guide rod (12) on a side close to the support rod (3).

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