Device for testing refractive index of optical glue
By combining the design of lateral displacement spectroscopy prism and CCD image sensor, the problem of insufficient accuracy of traditional optical glue refractive index testing methods is solved, higher accuracy measurement is achieved, and equipment investment and maintenance costs are reduced.
Patent Information
- Application Number
- CN202421773539.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-25
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-07-25
AI Technical Summary
The traditional optical glue refractive index testing method is affected by factors such as experimental environment, instrument accuracy and human operation, and it is difficult to meet the needs of high-precision measurement, and high-precision measurement equipment is expensive, which increases the cost of equipment investment.
Using a design that combines lateral displacement spectroscopy and CCD image sensor, the CCD image sensor uses lateral displacement spectroscopy to separate and combine beam beams. The CCD image sensor captures the beam offset with high accuracy to achieve more accurate refractive index measurement.
Improves the accuracy of optical glue refractive index measurement, reduces maintenance costs and difficulty, and enhances the flexibility of the test device.
Smart Images
Figure CN222926621U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of optical measurement, and particularly relates to a test device for the refractive index of optical glue. Background Art
[0002] As a commonly used glue in the optical precision manufacturing industry, many properties of optical glue have a great influence on the precision of optical products, such as the expansion coefficient, curing shrinkage rate, refractive index, etc. How to accurately measure these parameters is particularly important for product design.
[0003] Traditional methods for measuring the refractive index of optical glue may be affected by various factors such as the experimental environment, instrument precision, and human operation, resulting in errors in the measurement results and being difficult to meet the requirements of high-precision measurement. Using high-precision measurement equipment such as interferometers and spectrometers is often expensive, increasing the equipment investment cost of enterprises. At the same time, traditional test devices lack flexibility and have strong fixity. Summary of the Invention
[0004] The purpose of the utility model is to provide a test device for the refractive index of optical glue aiming at the problems existing in the prior art.
[0005] To achieve the above purpose, the utility model adopts the following technical scheme: A test device for the refractive index of optical glue, including a workbench. An inclined laser and a CCD image sensor are respectively arranged on the surface of the workbench. A lateral displacement beam splitter prism and a first window are arranged between the emission end of the laser and the receiving surface of the CCD image sensor. The lateral displacement beam splitter prism is arranged close to the emission end of the laser, and the first window is arranged close to the receiving surface of the CCD image sensor. A second window and a third window arranged in parallel are arranged on one side of the first window close to the lateral displacement beam splitter prism. The second window is attached to the first window, and the optical glue is arranged between the third window and the first window. The laser, the lateral displacement beam splitter prism, the first window, the second window, the third window and the CCD image sensor are respectively detachably connected to the workbench through connecting pieces.
[0006] By adopting the above technical scheme, through the design combining the lateral displacement beam splitter prism and the CCD image sensor, the refractive index of the optical glue can be measured more accurately.
[0007] Optionally, a control panel is fixedly installed on the surface of the workbench, and a plurality of connection holes are arranged in an array on the workbench, and the connection holes are connected to the connecting pieces.
[0008] By adopting the above technical solution, the opening of the connection holes facilitates the maintenance and repair of the testing device. When a certain component in the testing device fails or needs to be replaced, the user can conveniently disassemble and install the relevant components through the connection holes, thereby reducing the maintenance cost and difficulty.
[0009] Optionally, the lateral displacement beam splitting prism includes a right-angle prism and a rhomboid prism connected by gluing. The side of the right-angle prism close to the rhomboid prism is a semi-transparent and semi-reflective surface, and the side of the rhomboid prism away from the right-angle prism is a fully reflective surface.
[0010] By adopting the above technical solution, the design of the lateral displacement beam splitting prism can simultaneously achieve the splitting and lateral displacement of the light beam.
[0011] Optionally, the first window pane, the second window pane, and the third window pane are all optical glasses.
[0012] Optionally, the connecting member includes a stud connected to the workbench. One end of the stud away from the workbench is provided with a mounting seat, and the other end of the mounting seat is movably connected to a rotating seat. An electromagnet is installed at the other end of the rotating seat, and a controller is provided inside the mounting seat. Iron sheets magnetically attracted to the electromagnet are respectively fixedly connected to the laser, the lateral displacement beam splitting prism, the first window pane, the second window pane, the third window pane, and the CCD image sensor.
[0013] By adopting the above technical solution, the magnetic attraction connection method between the electromagnet and the iron sheet makes the installation and disassembly of the components fast and simple. The user can easily fix the components on the connecting member or remove them from the connecting member without using complex fasteners or tools, thereby improving the testing efficiency and reducing the operation difficulty.
[0014] Optionally, one end of the rotating seat close to the mounting seat is fixedly connected to a rotating shaft. A rotating groove for the rotating shaft to rotate is formed on the surface of the mounting seat, and an anti-slip pad fitting the rotating shaft is fixedly connected to the inner side wall of the rotating groove.
[0015] By adopting the above technical solution, the cooperation between the rotating shaft and the rotating groove enables the rotating seat to drive the instrument on the surface of the rotating seat to adjust the angle.
[0016] Optionally, both ends of the controller are respectively connected to wires. A rotary joint connected to the wires is fixedly connected to the outside of the electromagnet, and a plug joint connected to the wires is fixedly connected to the end of the stud away from the mounting seat.
[0017] By adopting the above technical solution, the presence of the rotary joint allows the wires not to be at risk of being twisted or broken when the electromagnet rotates and adjusts on the mounting seat or the rotating seat. This design enhances the durability of the wires and ensures that the electromagnet can rotate smoothly to adjust its position, thereby meeting different testing requirements.
[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0019] 1. By adopting the design of combining a lateral displacement spectroscope prism and a CCD image sensor, the refractive index of the optical glue can be measured more precisely. The lateral displacement spectroscope prism can separate and combine light beams, while the CCD image sensor can accurately capture the offset of the light beam, thereby improving the measurement accuracy; 2. By setting a connecting member, under the control of the control panel, the controller inside the mounting seat can control the start and stop of the electromagnet, so that the experimental equipment can be conveniently disassembled and assembled. At the same time, a rotating groove and a rotating shaft are provided between the mounting seat and the rotating seat, so that during the experiment, the experimental equipment can be conveniently adjusted in angle, enhancing the flexibility of the testing device. Description of the Drawings
[0020] Figure 1 It is a schematic diagram of the connection structure between the workbench and the testing device of the present utility model;
[0021] Figure 2 It is a three-dimensional structure schematic diagram of the mounting seat of the present utility model;
[0022] Figure 3 It is a sectional view of the connection structure between the mounting seat and the rotating seat of the present utility model;
[0023] Figure 4 It is a schematic diagram of the connection structure between the lateral displacement spectroscope prism and the iron sheet of the present utility model;
[0024] Figure 5 It is a schematic diagram of the optical path of the testing device of the present utility model.
[0025] In the figure: 1. Workbench; 101. Control panel; 102. Connection hole; 2. Laser; 3. Lateral displacement spectroscope prism; 4. First window piece; 5. Second window piece; 6. Third window piece; 7. Optical glue; 8. CCD image sensor; 9. Connecting member; 91. Stud; 92. Mounting seat; 921. Cover plate; 922. Rotating groove; 923. Anti-slip pad; 93. Rotating seat; 931. Rotating shaft; 94. Electromagnet; 941. Rotary joint; 95. Controller; 951. Wire; 952. Plug connector; 96. Iron sheet. Detailed Embodiments
[0026] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the drawings in the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0027] As shown Figure 1 —5, the specific solution of the embodiment is as follows: A test device for the refractive index of an optical glue, including a workbench 1, which is the basic support platform for the entire test device. A control panel 101 is fixedly installed on the surface of the workbench 1. A connection hole 102 is opened on the surface of the workbench 1. The number of the connection holes 102 is several, and several connection holes 102 are equidistantly distributed.
[0028] An inclined laser 2 is provided on the surface of the workbench 1. The laser 2 is used to emit parallel light beams. A lateral displacement beam splitting prism 3 parallel to the emission end of the laser 2 is provided on the surface of the workbench 1. The lateral displacement beam splitting prism 3 includes a right-angle prism and a rhomboid prism connected by gluing. The side of the right-angle prism close to the rhomboid prism is a semi-transparent and semi-reflective surface, and the side of the rhomboid prism away from the right-angle prism is a fully reflective surface. The lateral displacement beam splitting prism 3 can be used to control the lateral displacement of the light beam. After receiving the laser beam, the lateral displacement beam splitting prism 3 divides it into two parallel light beams, and these two light beams propagate along different paths respectively;
[0029] A first window pane 4 is horizontally installed on the surface of the workbench 1. A second window pane 5 attached to the first window pane 4 is provided at one end of the first window pane 4 close to the lateral displacement beam splitting prism 3. A third window pane 6 is provided at one end of the first window pane 4 close to the lateral displacement beam splitting prism 3. The first window pane 4, the second window pane 5, and the third window pane 6 are all optical glasses. The second window pane 5 and the third window pane 6 have the same size. The length of the first window pane 4 is greater than the length of the second window pane 5. The refractive indices of the first window pane 4, the second window pane 5, and the third window pane 6 are the same. An optical glue 7 is provided between the third window pane 6 and the first window pane 4. An inclined CCD image sensor 8 is provided on the side of the first window pane 4 away from the third window pane 6. The receiving surface of the CCD image sensor 8 is parallel to the lateral displacement beam splitting prism 3.
[0030] A connecting member 9 for fixing the laser 2, the lateral displacement beam splitting prism 3, the first window pane 4, the second window pane 5, the third window pane 6, and the CCD image sensor 8 is provided on the workbench 1. The connecting member 9 includes a stud 91 connected to the workbench 1. The stud 91 is threadedly connected to the connection hole 102. With the arrangement of the stud 91, a mounting seat 92 is provided at the end of the stud 91 away from the workbench 1, so that the mounting seat 92 can be conveniently installed. The mounting seat 92 is connected to the stud 91 through a cover plate 921. The cover plate 921 is fixedly connected to the mounting seat 92 through a fixing screw. The mounting seat 92 is disc-shaped. A placement groove is opened at one end of the mounting seat 92 close to the cover plate 921;
[0031] The other end of the mounting base 92 is movably connected to a rotating base 93. One end of the rotating base 93 close to the mounting base 92 is fixedly connected to a rotating shaft 931. A rotating groove 922 for the rotation of the rotating shaft 931 is formed on the surface of the mounting base 92. An anti-slip pad 923 that fits the rotating shaft 931 is fixedly connected to the inner side wall of the rotating groove 922. The cooperation between the rotating groove 922 and the rotating shaft 931 enables the rotating base 93 to rotate. The anti-slip pad 923 increases the friction between the rotating shaft 931 and the rotating groove 922;
[0032] An electromagnet 94 is installed at the other end of the rotating base 93. A controller 95 is provided inside the mounting base 92. Two ends of the controller 95 are respectively connected to a wire 951. A rotary joint 941 connected to the wire 951 is fixedly connected to the outside of the electromagnet 94. A plug connector 952 connected to the wire 951 is fixedly connected to the end of the stud 91 away from the mounting base 92. The controller 95 can control the start and stop of the electromagnet 94. The rotary joint 941 prevents the wire 951 from getting entangled when the rotating base 93 rotates. Iron sheets 96 magnetically attracted to the electromagnet 94 are fixedly connected to the laser 2, the lateral displacement beam splitter prism 3, the first window 4, the second window 5, the third window 6 and the CCD image sensor 8 respectively.
[0033] The working principle of the above embodiment is as follows:
[0034] 1. The laser 2 emits a parallel light beam that is perpendicularly incident on the lateral displacement beam splitter prism 3;
[0035] 2. The incident parallel light beam is split into two parallel light beams;
[0036] 3. After one of the light beams is transmitted through the semi-transparent and semi-reflective surface of the lateral displacement beam splitter prism 3, it continues to pass through the third window 6, the optical glue 7, and the first window 4. In these media, the light beam will refract, and its propagation direction will change according to the refractive index of the medium. Finally, this light beam perpendicularly irradiates the CCD image sensor 8 to form a light spot;
[0037] 4. After the other light beam is reflected by the semi-transparent and semi-reflective surface of the lateral displacement beam splitter prism 3, it is reflected by a total reflection surface and then passes through the second window 5 and the first window 4 respectively. This light beam will also refract and finally perpendicularly irradiate the CCD image sensor 8 to form another light spot;
[0038] 5. The CCD image sensor 8 is used to detect and record the positions (i.e., coordinates) of the two light beams on it. Since the two light beams experience different refractions when passing through different media, the positions of the light spots formed on the CCD image sensor 8 will be different;
[0039] 6. By measuring the coordinate differences of the two light spots on the CCD image sensor 8 (i.e., the difference in lateral displacements), the actual lateral displacement caused by the refraction of the optical glue 7 can be obtained;
[0040] 7. Let the lateral displacement of the beam given by the lateral displacement beam splitter prism 3 be a, and the coordinate difference of the two beams on the CCD image sensor 8 (i.e., the actual lateral displacement) be b. The angles of incidence of the two beams on the second window pane 5 and the third window pane 6 are both θ, and the refractive indices of the first window pane 4, the second window pane 5, and the third window pane 6 are all n 1 , and the refractive index of the optical glue 7 is n 2 , and the thickness of the optical glue 7 is d;
[0041] 8. Then the actual lateral displacement value of the beam by the optical glue 7 is ; According to the law of refraction and trigonometric functions, the theoretical value of the lateral displacement of the beam by the glue layer can be calculated as , and the refractive index of the optical glue 7 is .
[0042] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A device for testing the refractive index of optical glue, characterized in that: The invention comprises a workbench (1), wherein a laser (2) and a CCD image sensor (8) are respectively arranged on the surface of the workbench (1), and are placed obliquely. A lateral displacement beam splitter prism (3) and a first window sheet (4) are arranged between the emission end of the laser (2) and the receiving surface of the CCD image sensor (8). The lateral displacement beam splitter prism (3) is arranged close to the emission end of the laser (2), the first window sheet (4) is arranged close to the receiving surface of the CCD image sensor (8), and the first window sheet (4) is arranged close to the receiving surface of the CCD image sensor (8). A second window sheet (5) and a third window sheet (6) arranged in parallel are provided on one side near the lateral displacement beam splitter prism (3); the second window sheet (5) is bonded to the first window sheet (4); an optical glue (7) is provided between the third window sheet (6) and the first window sheet (4); and the laser (2), the lateral displacement beam splitter prism (3), the first window sheet (4), the second window sheet (5), the third window sheet (6) and the CCD image sensor (8) are detachably connected to the workbench (1) via a connecting piece (9).
2. The optical glue refractive index testing device according to claim 1, characterized in that: A control panel (101) is fixedly mounted on the surface of the workbench (1), and a plurality of connection holes (102) are arranged in an array on the workbench (1), wherein the connection holes (102) are connected to the connection pieces (9).
3. The optical glue refractive index testing device according to claim 1, characterized in that: The lateral displacement beam splitter prism (3) comprises a right-angle prism and an oblique square prism which are glued together, wherein the side of the right-angle prism close to the oblique square prism is a semi-transparent and semi-reflective surface, and the side of the oblique square prism away from the right-angle prism is a fully reflective surface.
4. The optical glue refractive index testing device according to claim 1, characterized in that: The first window (4), the second window (5) and the third window (6) are all made of optical glass.
5. The optical glue refractive index testing device according to claim 1, characterized in that: The connecting member (9) comprises a stud (91) connected to the workbench (1); a mounting seat (92) is provided at one end of the stud (91) away from the workbench (1); the other end of the mounting seat (92) is movably connected to a rotating seat (93); an electromagnet (94) is installed at the other end of the rotating seat (93); a controller (95) is provided on the inner side of the mounting seat (92); and iron sheets (96) magnetically attracted to the electromagnet (94) are respectively fixedly connected to the laser (2), the lateral displacement beam splitter prism (3), the first window sheet (4), the second window sheet (5), the third window sheet (6) and the CCD image sensor (8).
6. The optical glue refractive index testing device according to claim 5, characterized in that: One end of the rotating seat (93) close to the mounting seat (92) is fixedly connected to a rotating shaft (931); a rotating groove (922) for the rotating shaft (931) to rotate is provided on the surface of the mounting seat (92); and an anti-slip pad (923) that fits the rotating shaft (931) is fixedly connected to the inner side wall of the rotating groove (922).
7. The optical glue refractive index testing device according to claim 5, characterized in that: Both ends of the controller (95) are connected to wires (951), the outer side of the electromagnet (94) is fixedly connected to a rotary joint (941) connected to the wire (951), and one end of the stud (91) away from the mounting seat (92) is fixedly connected to a plug connector (952) connected to the wire (951).