Detection device for light transmittance of Fresnel lens
By coating Fantasy black on the inner side wall of the housing of the Finier lens transmittance detection device to isolate external light interference, the problem of inaccurate detection data is solved and higher accuracy of transmittance measurement is achieved.
Patent Information
- Application Number
- CN202510568297.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-30
- Publication Date
- 2025-07-29
AI Technical Summary
When detecting the light transmittance of the Finier lens, other light interference in the factory floor leads to poor accuracy of the detection data.
A Finier lens transmittance detection device is designed, which isolates external interference light by coating Fantasy black on the inner side of the shell. It has a Finier lens fixing base, light source base and sensor mount base to ensure that light is only incident from one side of the Finier lens.
It improves the accuracy of the transmittance detection of Finier lenses and reduces the impact of external light on measurement results.
Smart Images
Figure CN120385486A_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of manufacturing Fresnel lens detection tooling, and specifically relates to a device for detecting the light transmittance of Fresnel lenses. Background Art
[0002] Fresnel lenses, also known as thread lenses, are mostly thin sheets injection-molded from polyolefin materials, and some are made of glass. One side of the lens surface is smooth, and the other side is engraved with concentric circles from small to large. Its texture is designed using the interference and diffraction of light and according to relative sensitivity and receiving angle requirements. The requirements for the lens are very high. However, currently, when detecting the light transmittance of Fresnel lenses, it is carried out in the factory workshop. Other lights in the factory (such as lighting lights, light from outside the workshop through the windows during the day, and the reflection of other products, etc.) will also irradiate the Fresnel lens, causing interference, thereby affecting the accuracy of the detection data. Summary of the Invention
[0003] The main purpose of this application is to address the shortcomings of the existing technology. By setting a Fresnel lens fixing seat, a light source seat, and a sensor mounting seat in a housing with Vantablack coated on its inner sidewall, a device for detecting the light transmittance of Fresnel lenses is designed. The interference light from the outside is isolated by the Vantablack coated on the inner wall of the housing, solving the problem of how to improve the accuracy of the light transmittance of Fresnel lenses.
[0004] To achieve the above purpose, the technical solution adopted in this application is:
[0005] A device for detecting the light transmittance of Fresnel lenses includes a housing. There is an opening on the inner bottom wall of the housing, and a switch door is hermetically fitted at the opening on the housing. A moving seat is provided inside the housing. The moving seat is provided with a Fresnel lens fixing seat, a light source seat, and a sensor mounting seat. The projections of the Fresnel lens fixing seat, the light source seat, and the sensor mounting seat on the moving seat are located on a straight line. At least one signal line penetrates through the sidewall of the housing, and the end of the signal line inside the housing is fixed on the sensor mounting seat. The inner surface of the housing, the outer surface of the moving seat, the outer surface of the Fresnel lens fixing seat, the outer surface of the light source seat, the outer surface of the sensor mounting seat, and the inner sidewall of the switch door are all coated with Vantablack.
[0006] Preferably, the moving seat includes a base and a main guide rail. The main guide rail is installed inside the housing, and the main guide rail is parallel to the axis of the opening. The base is slidably arranged between the two ends of the main guide rail.
[0007] Preferably, at least one signal line and at least two power lines penetrate through the side wall of the housing. One end of the signal line inside the housing is placed on the sensor mounting base. One end of at least one of the power lines inside the housing is placed on the light source base, and one end of at least one of the power lines inside the housing is placed on the sensor mounting base.
[0008] Preferably, the sensor mounting base is provided with a signal output socket, a signal input / output socket, a power output socket, and a power input socket. The signal output socket is signal-connected to the signal input / output socket, and the power output socket is electrically connected to the power input socket.
[0009] Preferably, a secondary track is provided on the upper surface of the moving base. The Fresnel lens fixing base, the light source base, and the sensor mounting base are all slidably arranged between the two ends of the secondary track.
[0010] Preferably, the Fresnel lens fixing base is provided with a first limiter that cooperates with the secondary track, the light source base is provided with a second limiter that cooperates with the secondary track, and the sensor mounting base is provided with a third limiter that cooperates with the secondary track.
[0011] Preferably, the first limiter includes a first bolt and a first screw hole. The first screw hole is provided on the Fresnel lens fixing base and is located directly above the secondary track. When limiting is required, the first bolt is screwed into the first screw hole so that the top of the first bolt abuts against the secondary track. When the position of the Fresnel lens fixing base needs to be moved, the first bolt is screwed out of the first screw hole;
[0012] and / or
[0013] The second limiter includes a second bolt and a second screw hole. The second screw hole is provided on the light source base, and the lower end of the second screw hole extends to directly above the secondary track. When limiting is required, the second bolt is screwed into the second screw hole so that the lower end of the second bolt abuts against the secondary track. When the limit needs to be released, the second bolt is screwed out of the second screw hole;
[0014] and / or
[0015] The third limiter includes a third bolt and a third screw hole. The third screw hole is provided on the sensor mounting base, and the lower end of the third screw hole extends to directly above the secondary track. When limiting is required, the third bolt is screwed into the third screw hole so that the lower end of the third bolt abuts against the secondary track. When the limit needs to be released, the third bolt is screwed out of the third screw hole.
[0016] Preferably, the secondary track is parallel to the main track.
[0017] Preferably, the sensor mounting base includes a first base body, a first lifter, and a first mounting jig. The first mounting jig is fixedly connected to the first base body through the first lifter. The first base body is disposed on the moving base, and the lifting direction of the first lifter is perpendicular to the upper surface of the moving base.
[0018] Preferably, the light source base includes a second base body, a second lifter, and a second mounting jig. The second mounting jig is fixedly disposed on the second base body through the second lifter. The second base body is disposed on the moving base, and the lifting direction of the second lifter is perpendicular to the upper surface of the moving base.
[0019] Compared with the prior art, the present application has the following beneficial effects:
[0020] The present application adopts a method of arranging a Fresnel lens fixing base, a light source base, and a sensor mounting base in a housing with Vantablack coated on the inner sidewall, and designs a Fresnel lens light transmittance detection device. By isolating the external interfering light through the Vantablack coated on the inner wall of the housing, the problem of how to improve the accuracy of the light transmittance of the Fresnel lens is solved. Description of the Drawings
[0021] Figure 1 is a schematic external structure diagram of the present application;
[0022] Figure 2 is Figure 1 a schematic diagram of the structure after removing the housing in
[0023] Figure 3 is Figure 2 a schematic diagram after disassembling the first bolt, the second bolt, and the third bolt in
[0024] Figure 4 is Figure 3 an enlarged view of part A in
[0025] Figure 5 is Figure 3 an enlarged view of part B in
[0026] Figure 6 is Figure 1 a schematic diagram of opening the switch door in
[0027] Among them, 1. housing; 2. opening; 3. switch door; 4. base; 5. main guide rail; 6. power cord; 7. signal line; 8. auxiliary guide rail; 9. first limiter; 9-1. first bolt; 9-2. first screw hole; 10. second limiter; 10-1. second bolt; 10-2. second screw hole; 11. Fresnel lens fixing seat; 12. first seat body; 13. first lifter; 13-1. fourth screw hole; 13-2. first core column; 13-3. first sleeve; 13-4. fourth bolt; 14. first installation fixture; 15. second seat body; 16. second lifter; 16-1. fifth screw hole; 16-2. second core column; 16-3. second sleeve; 16-4. fifth bolt; 17. second installation fixture; 18. third limiter; 18-1. third bolt; 18-2. third screw hole. Specific implementation manner
[0028] As Figures 1-6 As shown, a Fresnel lens light transmittance detection device includes a housing 1. An opening 2 is provided on the inner bottom wall of the housing 1. A switch door 3 is hermetically fitted at the opening 2 of the housing 1. A moving seat is provided inside the housing 1. A Fresnel lens fixing seat 11, a light source seat, and a sensor mounting seat are provided on the moving seat. The projections of the Fresnel lens fixing seat 11, the light source seat, and the sensor mounting seat on the moving seat are located on a straight line. At least one signal line 7 penetrates through the side wall of the housing 1. One end of the signal line 7 inside the housing 1 is fixed on the sensor mounting seat. Vantablack is coated on the inner surface of the housing 1, the outer surface of the moving seat, the outer surface of the Fresnel lens fixing seat 11, the outer surface of the light source seat, the outer surface of the sensor mounting seat, and the inner side wall of the switch door 3.
[0029] In this embodiment, during use, the Fresnel lens is fixed on the Fresnel lens fixing seat 11, the light source is installed on the light source seat, and the sensor is installed on the sensor mounting seat. In this way, the sensor receives the light emitted from one side of the Fresnel lens by the light source, and the light transmission efficiency of the Fresnel lens is obtained through the measurement of the sensor, so as to determine whether the Fresnel lens is qualified. If there are black spots or light-blocking parts in the light spot transmitted through the detected Fresnel lens, it is determined that the detected Fresnel lens is unqualified. The moving seat is provided to facilitate the placement of the relationship among the light source, the Fresnel lens, and the sensor into the housing 1 after they are fixed. Since the housing 1 is relatively small, it is inconvenient to fix the light source, the Fresnel lens, and the sensor inside the housing 1. The signal line is for enabling the sensor to transmit the received information outside the housing 1, and the power line is mainly used to supply electrical energy to the light source and the sensor. The setting of the switch door 3 is mainly to prevent the light outside the housing 1 from entering the housing 1, so as to ensure the accuracy of the measurement. Since Vantablack is a coating material. It only reflects 0.035% of the light and is the blackest material in the world as of 2014. Therefore, the coating of Vantablack is to prevent the inner side wall of the housing 1 and the inner side of the switch door 3 from reflecting the light of the light source onto the sensor and affecting the measurement result.
[0030] As a preferred method, the moving seat includes a base 4 and a main guide rail 5. The main guide rail 5 is installed inside the housing 1, and the main guide rail 5 is parallel to the axis of the opening 2. The base 4 is slidably disposed between the two ends of the main guide rail 5. Through the setting of the main guide rail 5, it is convenient to pull the base 4 out of the housing 1 and to push the base 4 into the housing 1 after the relative fixation among the light source, the Fresnel lens, and the sensor.
[0031] As a preferred method, at least one signal line 7 and at least two power lines 6 penetrate through the side wall of the housing 1. The end of the signal line 7 inside the housing 1 is placed on the sensor mounting seat. At least one end of at least one power line 6 inside the housing 1 is placed on the light source seat, and at least one end of at least one power line 6 inside the housing 1 is placed on the sensor mounting seat. The signal line 7 and the power lines 6 both have a surplus inside the housing 1, so as to prevent the lines from being broken when dragging the base 4. The surfaces of the parts of the signal line 7 and the power lines 6 inside the housing 1 are coated with Vantablack to avoid the surface reflection of the signal line 7 and the power lines 6 affecting the detection result.
[0032] As a preferred embodiment, the sensor mounting base is provided with a signal output socket, a signal input / output socket, a power output socket, and a power input socket. The signal output socket is signal-connected to the signal input / output socket, and the power output socket is electrically connected to the power input socket. By providing the signal output socket and the signal input / output socket in this way, it is convenient to replace sensors of different models. When replacing, it is only necessary to pull out the signal plug and the power plug on the original sensor to disassemble it.
[0033] As a preferred embodiment, the upper surface of the moving base is provided with a secondary track 8. The Fresnel lens fixing base 11, the light source base, and the sensor mounting base are all slidably disposed between the two ends of the secondary track 8. The Fresnel lens fixing base 11 is provided with a first limiter 9 that cooperates with the secondary track 8, the light source base is provided with a second limiter 10 that cooperates with the secondary track 8, and the sensor mounting base is provided with a third limiter 18 that cooperates with the secondary track 8. By providing the secondary track 8, it is convenient to adjust the relative distances among the light source, the Fresnel lens, and the sensor.
[0034] The first limiter 9 includes a first bolt 9-1 and a first screw hole 9-2. The first screw hole 9-2 is provided on the Fresnel lens fixing base 11 and is located directly above the secondary track 8. When limiting is required, the first bolt 9-1 is screwed into the first screw hole 9-2 so that the top end of the first bolt 9-1 abuts against the secondary track 8 to achieve limiting. At this time, the Fresnel lens fixing base 11 can no longer slide on the secondary track 8. When the position of the Fresnel lens fixing base 11 needs to be moved, it is only necessary to unscrew the first bolt 9-1 from the first screw hole 9-2 to release the limit.
[0035] The second limiter 10 includes a second bolt 10-1 and a second screw hole 10-2. The second screw hole 10-2 is provided on the light source base, and the lower end of the second screw hole 10-2 extends to directly above the secondary track 8. When limiting is required, the second bolt 10-1 is screwed into the second screw hole 10-2 so that the lower end of the second bolt 10-1 abuts against the secondary track 8 to achieve limiting. When the limit needs to be released, the second bolt 10-1 is unscrewed from the second screw hole 10-2.
[0036] The third limiter 18 includes a third bolt 18-1 and a third screw hole 18-2. The third screw hole 18-2 is provided on the sensor mounting base, and the lower end of the third screw hole 18-2 extends to directly above the secondary track 8. When limiting is required, the third bolt 18-1 is screwed into the third screw hole 18-2 so that the lower end of the third bolt 18-1 abuts against the secondary track 8 to achieve limiting. When the limit needs to be released, the third bolt 18-1 is unscrewed from the third screw hole 18-2.
[0037] As a preferred embodiment, the secondary track 8 is parallel to the primary track 5, which is convenient for adjustment.
[0038] As a preferred embodiment, the sensor mounting base includes a first base body 12, a first lifter 13, and a first mounting jig 14. The first mounting jig 14 is fixedly arranged on the first base body 12 through the first lifter 13. The first base body 12 is arranged on the moving base, and the lifting direction of the first lifter 13 is perpendicular to the upper surface of the moving base. After such an arrangement, the sensor is fixed by the first mounting jig 14, and the first lifter 13 is used to adjust the height of the sensor fixed on the first mounting jig 14 so that the sensor can be adapted to the Fresnel lens.
[0039] The first lifter 13 includes a fourth screw hole 13-1, a first core column 13-2, a first sleeve 13-3, and a fourth bolt 13-4. The first sleeve 13-3 is vertically and fixedly arranged on the first base body 12. The lower end of the first core column 13-2 is coaxially inserted into the first sleeve 13-3, and the lower end of the first core column 13-2 is axially slidably connected to the first sleeve 13-3. The top end of the first core column 13-2 is fixedly connected to the first mounting jig 14. The fourth screw hole 13-1 is arranged near the top of the side wall of the first sleeve 13-3. The fourth bolt 13-4 cooperates with the fourth screw hole 13-1. When adjusting the lifting, after axially moving the first core column 13-2 relative to the first sleeve 13-3, the fourth bolt 13-4 is screwed into the fourth screw hole 13-1, so that the end of the fourth bolt 13-4 located inside the first sleeve 13-3 abuts against the side wall of the first core column 13-2 to fix the first core column 13-2.
[0040] As a preferred embodiment, the light source base includes a second base body 15, a second lifter 16, and a second mounting jig 17. The second mounting jig 17 is fixedly arranged on the second base body 15 through the second lifter 16. The second base body 15 is arranged on the moving base, and the lifting direction of the second lifter 16 is perpendicular to the upper surface of the moving base. After such an arrangement, the light source is fixed at the free end of the second lifter 16 through the second mounting jig 17, and the height of the light source relative to the Fresnel lens is adjusted by the second lifter 16. Since the second lifter 16 and the first lifter 13 are respectively provided for the light source and the sensor, the Fresnel lens does not need to be provided with a lifter.
[0041] The second lifter 16 includes a fifth screw hole 16-1, a second core column 16-2, a second sleeve 16-3, and a fifth bolt 16-4. The second sleeve 16-3 is vertically and fixedly arranged on the second seat body 15. The lower end of the second core column 16-2 is coaxially inserted into the second sleeve 16-3, and the lower end of the second core column 16-2 is axially slidably connected to the second sleeve 16-3. The top end of the second core column 16-2 is fixedly connected to the second mounting jig 17. The fifth screw hole 16-1 is arranged near the top end on the side wall of the second sleeve 16-3. The fifth bolt 16-4 is matched with the fifth screw hole 16-1. When adjusting the lifting, after axially moving the second core column 16-2 relative to the second sleeve 16-3, and then screwing the fifth bolt 16-4 into the fifth screw hole 16-1, the end of the fifth bolt 16-4 located inside the second sleeve 16-3 abuts against the side wall of the second core column 16-2 to fix the second core column 16-2.
Claims
1. A Fresnel lens light transmittance detection device, characterized in that It includes a housing (1). An opening (2) is provided on the inner bottom wall of the housing (1). A switch door (3) is hermetically fitted at the opening (2) of the housing (1). A movable seat is provided inside the housing (1). A Fresnel lens fixing seat (11), a light source seat, and a sensor mounting seat are provided on the movable seat. The projections of the Fresnel lens fixing seat (11), the light source seat, and the sensor mounting seat on the movable seat are located on a straight line. At least one signal line (7) penetrates through the side wall of the housing (1). One end of the signal line (7) inside the housing (1) is fixed on the sensor mounting seat. Vantablack is coated on the inner surface of the housing (1), the outer surface of the movable seat, the outer surface of the Fresnel lens fixing seat (11), the outer surface of the light source seat, the outer surface of the sensor mounting seat, and the inner side wall of the switch door (3).
2. The Fresnel lens light transmittance detection device according to claim 1, characterized in that, The movable seat includes a base (4) and a main guide rail (5). The main guide rail (5) is installed inside the housing (1). The main guide rail (5) is parallel to the axis of the opening (2). The base (4) is slidably arranged between the two ends of the main guide rail (5).
3. The Fresnel lens light transmittance detection device according to claim 1, characterized in that, At least one signal line (7) and at least two power lines (6) penetrate through the side wall of the housing (1). One end of the signal line (7) inside the housing (1) is placed on the sensor mounting seat. One end of at least one of the power lines (6) inside the housing (1) is placed on the light source seat. One end of at least one of the power lines (6) inside the housing (1) is placed on the sensor mounting seat.
4. The Fresnel lens light transmittance detection device according to claim 3, characterized in that, The sensor mounting seat is provided with a signal output socket, a signal input / output socket, a power output socket, and a power input socket. The signal output socket is signal-connected to the signal input / output socket. The power output socket is electrically connected to the power input socket.
5. The Fresnel lens light transmittance detection device according to claim 1, characterized in that, A secondary track (8) is provided on the upper surface of the movable seat. The Fresnel lens fixing seat (11), the light source seat, and the sensor mounting seat are all slidably arranged between the two ends of the secondary track (8).
6. The Fresnel lens light transmittance detection device according to claim 5, characterized in that, The Fresnel lens fixing seat (11) is provided with a first limiter (9) that cooperates with the secondary track (8). The light source seat is provided with a second limiter (10) that cooperates with the secondary track (8). The sensor mounting seat is provided with a third limiter (18) that cooperates with the secondary track (8).
7. The Fresnel lens light transmittance detection device according to claim 6, wherein The first limiter (9) includes a first bolt (9-1) and a first screw hole (9-2). The first screw hole (9-2) is provided on the Fresnel lens fixing seat (11). The first screw hole (9-2) is located directly above the secondary track (8). When limiting is required, the first bolt (9-1) is screwed into the first screw hole (9-2) so that the top end of the first bolt (9-1) abuts against the secondary track (8). When the position of the Fresnel lens fixing seat (11) needs to be moved, the first bolt (9-1) is screwed out of the first screw hole (9-2). and / or The second limiter (10) includes a second bolt (10-1) and a second screw hole (10-2). The second screw hole (10-2) is provided on the light source base. The lower end of the second screw hole (10-2) extends directly above the secondary track (8). When limiting is required, the second bolt (10-1) is screwed into the second screw hole (10-2) so that the lower end of the second bolt (10-1) abuts against the secondary track (8). When the limit needs to be released, the second bolt (10-1) is unscrewed from the second screw hole (10-2). and / or The third limiter (18) includes a third bolt (18-1) and a third screw hole (18-2). The third screw hole (18-2) is provided on the sensor mounting base. The lower end of the third screw hole (18-2) extends directly above the secondary track (8). When limiting is required, the third bolt (18-1) is screwed into the third screw hole (18-2) so that the lower end of the third bolt (18-1) abuts against the secondary track (8). When the limit needs to be released, the third bolt (18-1) is unscrewed from the third screw hole (18-2).
8. The Fresnel lens light transmittance detection device according to claim 6, wherein, The secondary track (8) is parallel to the main track (5).
9. The Fresnel lens light transmittance detection device according to claim 1, characterized in that, The sensor mounting base includes a first base body (12), a first lifter (13), and a first mounting jig (14). The first mounting jig (14) is fixedly connected to the first base body (12) through the first lifter (13). The first base body (12) is provided on the moving base. The lifting direction of the first lifter (13) is perpendicular to the upper surface of the moving base.
10. The Fresnel lens light transmittance detection device according to claim 1, characterized in that, The light source base includes a second base body (15), a second lifter (16), and a second mounting jig (17). The second mounting jig (17) is fixedly provided on the second base body (15) through the second lifter (16). The second base body (15) is provided on the moving base. The lifting direction of the second lifter (16) is perpendicular to the upper surface of the moving base.