Fresnel lens energy transfer efficiency detector
By designing a Finnil lens energy transfer efficiency detector, the combination of reflective surface, infrared transmitter and reception sensor is used to solve the problem of energy transfer efficiency detection of Fresnel lenses, and an efficient and accurate detection effect is achieved.
Patent Information
- Application Number
- CN202510568281.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-30
- Publication Date
- 2025-07-25
AI Technical Summary
There is a lack of effective methods in the prior art to detect the energy transfer efficiency of Fresnel lenses.
A Finnell lens energy transfer efficiency detector is designed, using a combination of a reflective surface, an infrared emitter, an infrared receiving sensor and a lens placing device to detect the energy transfer efficiency of a Fresnel lens through reflection and reception of infrared rays.
Accurate detection of the energy transfer efficiency of Fresnel lenses is achieved, and the difference in energy transfer between different Fresnel lenses can be judged, and detection efficiency and accuracy can be improved.
Smart Images
Figure CN120369280A_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of Fresnel lens detection and manufacturing, and specifically relates to a Fresnel lens energy transfer efficiency detector. Background Art
[0002] The Fresnel lens, also known as a thread lens, is mostly a thin sheet injection-molded from Polyolefin material, and there are also Glass manufactured ones. One side of the lens surface is smooth, and the other side is engraved with Concentric circles from small to large, and its Texture is designed according to Interference of light and diffraction as well as relative sensitivity and receiving angle requirements.
[0003] The Fresnel lens is mainly applied in the fields of projection and solar photovoltaics. Because the light rays emitted by the Fresnel lens have a relatively soft edge, it is commonly used in dyeing lamps. A colored plastic film is placed on the frame in front of the lens to dye the light, or a metal mesh or frosted plastic can be placed to diffuse the light. Many devices containing Fresnel lenses allow the lamp to move back and forth in front of and behind the focus to enlarge or reduce the size of the light beam. It is very suitable for use in lens projectors, Rear projection TV slide projectors, and collimators, not only because the light passing through it is brighter than that passing through an ordinary lens, but also because the brightness of the entire light beam passing through it is relatively consistent at each part.
[0004] In the field of solar photovoltaics, the Fresnel lens mainly serves as a Concentrating photovoltaic system condensing component in to convert light from a relatively large area into a relatively small area. Therefore, in the application process, the energy transfer efficiency of the Fresnel lens is very important, and it is necessary to detect the energy transfer efficiency of the Fresnel lens.
[0005] The main purpose of this application is to address the shortcomings of the existing technology. By using a method of coordinating a reflecting surface, an infrared emitter, an infrared receiving sensor, and a lens placer, a Fresnel lens energy transfer efficiency detector is designed to obtain the energy value received by the infrared receiving sensor, thus solving the problem of how to detect the energy transfer efficiency of the Fresnel lens.
[0006] To achieve the above objective, the technical solution adopted in this application is:
[0007] A Fresnel lens energy transfer efficiency detector, comprising a reflecting surface, an infrared emitter, an infrared receiving sensor, and a lens placer. The emission direction of the infrared emitter and the receiving direction of the infrared receiving sensor both face the reflecting surface. A Fresnel lens is provided on the lens placer, and the Fresnel lens is fixedly arranged between the whole formed by the infrared emitter and the infrared receiving sensor and the reflecting surface. The infrared receiving sensor is used to receive the infrared rays emitted by the infrared emitter, passing through the detected Fresnel lens and then reflected by the reflecting surface. The infrared receiving sensor is signal-connected to a display system.
[0008] Preferably, the reflecting surface includes a first detection reflecting surface and a second detection reflecting surface. The first detection reflecting surface and the second detection reflecting surface are in the same plane. A circular non-reflecting part is provided at the center of the second detection reflecting surface, and the inner diameter of the non-reflecting part is smaller than the radius of the area where the infrared rays emitted by the infrared emitter reach the Fresnel lens fixed by the lens placer.
[0009] Preferably, it further includes a frame body. The reflecting surface switching mechanism, the infrared emitter, the infrared receiving sensor, and the lens placer are all arranged on the frame body. The reflecting surface switching mechanism is located above the lens placer, and the infrared emitter and the infrared receiving sensor are both located directly below the lens placer.
[0010] Preferably, the reflecting surface switching mechanism is provided with a first reflecting plate and a second reflecting plate. The surface of the first reflecting plate facing the infrared emitter is the first detection reflecting surface, and the surface of the second reflecting plate facing the infrared emitter is the second detection reflecting surface.
[0011] Preferably, the non-reflecting part is a through hole provided on the second reflecting plate.
[0012] Preferably, the non-reflecting part is Vantablack coated on a circular area of the second reflecting surface.
[0013] Preferably, the reflecting surface switching mechanism includes guide rails, a pusher, and an elastic member. Two of the guide rails are provided on the frame body. Opposite sides of the first reflector are respectively slidably connected between two ends of the two guide rails. Opposite sides of the second reflector are respectively slidably connected between two ends of the two guide rails. The two guide rails are parallel to each other, and the guide rails are parallel to both the first reflector and the second reflector. The pusher is provided on one side of the whole formed by the first reflector and the second reflector on the frame body. The elastic member is provided on the side of the whole formed by the first reflector and the second reflector on the frame body that faces away from the pusher. The pusher is used to push the whole formed by the first reflector and the second reflector towards the elastic member. When the elastic member is in a normal state, the first reflector is located directly above the whole formed by the infrared emitter and the infrared receiving sensor.
[0014] Preferably, the pusher includes a lead screw, a threaded hole, and a top plate. The threaded hole is provided on a cross bar, and the cross bar is fixedly provided on the frame body. The cross bar is located on the side of the whole formed by the first reflector and the second reflector that faces away from the elastic member. The axis of the threaded hole is parallel to the first reflector. The two ends of the lead screw are threadedly connected to the threaded hole, and the top plate is rotatably provided at one end of the lead screw that faces the whole formed by the first reflector and the second reflector.
[0015] Preferably, the elastic member is a spring.
[0016] Preferably, sliding grooves for slidably connecting with the guide rails are provided on opposite sides of the first reflector and opposite sides of the second reflector.
[0017] Compared with the prior art, the present application has the following beneficial effects:
[0018] The present application adopts a method of setting the reflecting surface, infrared emitter, infrared receiving sensor, and lens placer to cooperate with each other, and designs a Fresnel lens energy transfer efficiency detector, and the energy value received by the infrared receiving sensor, thereby solving the problem of how to detect the energy transfer efficiency of the Fresnel lens. Description of the Drawings
[0019] Figure 1 is a schematic structural diagram of the present application;
[0020] Figure 2 is Figure 1 an enlarged view of part A in
[0021] Figure 3 is Figure 1 a schematic structural diagram of the bottom;
[0022] Figure 4Schematic diagram of infrared reflection when the first detection reflecting surface is adopted in this application;
[0023] Figure 5 Schematic diagram of infrared emission when the second detection reflecting surface is adopted in this application;
[0024] Figure 6 Schematic diagram showing the sliding groove in this application;
[0025] Figure 7 Schematic diagram of one end of the spring contacting the first reflector in this application.
[0026] Wherein, 1, infrared emitter; 2, infrared receiving sensor; 3, lens placer; 4, first detection reflecting surface; 5, second detection reflecting surface; 6, frame; 7, first reflector; 8, second reflector; 9, through hole; 10, guide rail; 11, spring; 12, lead screw; 13, top plate; 14, cross bar; 15, sliding groove. Detailed implementation manner
[0027] As Figures 1-7 shown, a Fresnel lens energy transfer efficiency detector includes a reflecting surface, an infrared emitter 1, an infrared receiving sensor 2, and a lens placer 3. The emission direction of the infrared emitter 1 and the receiving direction of the infrared receiving sensor 2 both face the reflecting surface. A Fresnel lens 16 is arranged on the lens placer 3. The Fresnel lens 16 is fixedly arranged between the whole composed of the infrared emitter 1 and the infrared receiving sensor 2 and the reflecting surface. The infrared receiving sensor 2 is used to receive the infrared rays emitted by the infrared emitter 1, passing through the detected Fresnel lens 16 and then reflected by the reflecting surface. The infrared receiving sensor 2 is signal-connected to the display system.
[0028] In this embodiment, during use, the detected Fresnel lens 16 is placed on the lens placer 3. Then, the infrared emitter 1 emits infrared rays to penetrate the Fresnel lens 16 to the reflecting surface. Then, the reflecting surface reflects the infrared rays at a 45-degree angle and penetrates through the Fresnel lens 16 to reach the infrared receiving sensor 2. The infrared receiving sensor 2 records the received energy value. Different Fresnel lenses 16 will result in differences in the received energy value, which is used to judge the overall energy transfer efficiency.
[0029] As a preferred embodiment, the reflecting surface includes a first detection reflecting surface 4 and a second detection reflecting surface. The first detection reflecting surface 4 and the second detection reflecting surface 5 are in the same plane. A circular non-reflecting portion is provided at the center of the second detection reflecting surface 5, and the inner diameter of the non-reflecting portion is smaller than the radius of the area where the infrared rays emitted by the infrared emitter 1 reach the Fresnel lens 16 fixed by the lens placer. After such a design, during the first detection, the line undergoes a 45-degree total reflection through the first detection reflecting surface 4, that is, after the infrared rays penetrate the first detection reflecting surface 4, they will be totally reflected and penetrate the Fresnel lens 16 to reach the infrared receiving sensor 2. Finally, the surface with the highest transmission efficiency received by the infrared receiving sensor 2 should be a circle. Then, the detection is switched to the second detection reflecting surface 5. Since there is a non-reflecting portion on the second detection reflecting surface 5 that cannot reflect, the energy received by the infrared receiving sensor 2 should be reduced in a preset proportion. If the reduced proportion is too large, it is determined that the transmission efficiency of the detected position on the Fresnel lens 16 is too low.
[0030] As a preferred embodiment, it further includes a frame 6. The reflecting surface switching mechanism, the infrared emitter 1, the infrared receiving sensor 2, and the lens placer are all arranged on the frame 6. The reflecting surface switching mechanism is located above the lens placer 3, and the infrared emitter 1 and the infrared receiving sensor 2 are both located directly below the lens placer 3. In this way, through the frame 6, the reflecting surface switching mechanism, the infrared emitter 1, the infrared receiving sensor 2, and the lens placer form an integral whole, which is convenient for handling and storage.
[0031] Specifically, a first reflecting plate 7 and a second reflecting plate 8 are provided on the reflecting surface switching mechanism. The surface of the first reflecting plate 7 facing the infrared emitter 1 is the first detection reflecting surface 4, and the surface of the second reflecting plate 8 facing the infrared emitter 1 is the second detection reflecting surface 5.
[0032] As a preferred embodiment, the non-reflecting portion is a through hole 9 provided on the second reflecting plate 8. After the through hole 9 is provided, the infrared rays irradiated to the through hole 9 will not be reflected to the infrared receiving sensor 2.
[0033] As a preferred embodiment, the non-reflecting portion is Vantablack coated on a circular area of the second reflecting surface. Vantablack can absorb infrared rays, and the infrared rays irradiated to the Vantablack will not or only a very small part be reflected to the infrared receiving sensor 2.
[0034] As a preferred embodiment, the reflecting surface switching mechanism includes guide rails 10, a pusher, and an elastic member. The two guide rails 10 are provided on the frame 6. The opposite sides of the first reflecting plate 7 are respectively slidably connected between the two ends of the two guide rails 10. The opposite sides of the second reflecting plate 8 are respectively slidably connected between the two ends of the two guide rails 10. The two guide rails 10 are parallel to each other, and the guide rails 10 are parallel to both the first reflecting plate 7 and the second reflecting plate 8. The pusher is provided on one side of the whole formed by the first reflecting plate 7 and the second reflecting plate 8 on the frame 6. The elastic member is provided on the side of the whole formed by the first reflecting plate 7 and the second reflecting plate 8 facing away from the pusher on the frame 6. The pusher is used to push the whole formed by the first reflecting plate 7 and the second reflecting plate 8 towards the elastic member. When the elastic member is in its normal state, the first reflecting plate 7 is located directly above the whole formed by the infrared emitter 1 and the infrared receiving sensor 2. After the guide rails 10 are provided, when it is necessary to replace the first reflecting plate 7 with the second reflecting plate 8, only need to push the second reflecting plate 8 through the pusher, so as to squeeze the first reflecting plate 7 towards the elastic member, making the first reflecting plate 7 leave directly above the infrared emitter 1. When it is necessary to switch back to the second reflecting plate 8 being located directly above the infrared emitter 1, just release the second reflecting plate 8 by the pusher. At this time, the elastic member will push the first reflecting plate 7 towards the direction of the pusher, so that the first reflecting plate 7 will squeeze the second reflecting plate 8 towards the pusher. Finally, the first reflecting plate 7 is located directly above the infrared emitter 1, realizing the total reflection of infrared rays at a 45-degree angle.
[0035] As a preferred embodiment, the pusher includes a lead screw 12, a threaded hole, and a top plate 13. The threaded hole is provided on the cross bar 14. The cross bar 14 is fixedly provided on the frame 6. The cross bar 14 is located on the side of the whole formed by the first reflecting plate 7 and the second reflecting plate 8 facing away from the elastic member. The axis of the threaded hole is parallel to the first reflecting plate 7. The two ends of the lead screw 12 are threadedly connected to the threaded hole. The top plate 13 is rotatably provided at one end of the lead screw 12 facing the whole formed by the first reflecting plate 7 and the second reflecting plate 8. After such a setting, the second reflecting plate 8 is pushed by rotating the lead screw 12 into the threaded hole. Such a pushing method is relatively precise. The setting of the top plate 13 makes the rotation of the lead screw 12 not affect the second reflecting plate 8.
[0036] Specifically, as Figure 7 shown, the elastic member is a spring 11. Among them, a top block is provided at one end of the spring 11 in contact with the first reflecting plate 7. This is to increase the contact surface with the side wall of the first reflecting plate 7 and prevent slipping.
[0037] As a preferred method, sliding grooves 15 slidably connected to the guide rails 10 are provided on opposite sides of the first reflector 7 and opposite sides of the second reflector 8. By setting the sliding grooves 15 in this way, it is ensured that when the first reflector 7 and the second reflector 8 are pushed by the pusher, they will not warp, so that the distance between the Fresnel lens 16 and the reflecting surface of 6.32 mm ± 50 μm will not change due to the pushing of the pusher.
Claims
1. A Fresnel lens energy transfer efficiency detector, characterized in that It includes a reflecting surface, an infrared emitter (1), an infrared receiving sensor (2), and a lens placer (3). The emission direction of the infrared emitter (1) and the receiving direction of the infrared receiving sensor (2) both face the reflecting surface. A Fresnel lens (16) is provided on the lens placer (3), and the Fresnel lens (16) is fixedly arranged between the whole composed of the infrared emitter (1) and the infrared receiving sensor (2) and the reflecting surface. The infrared receiving sensor (2) is used to receive the infrared rays emitted by the infrared emitter (1), passing through the Fresnel lens (16) and then reflected by the reflecting surface. The infrared receiving sensor (2) is signal-connected to a display system.
2. The Fresnel lens energy transfer efficiency detector according to claim 1, wherein The reflecting surface includes a first detection reflecting surface (4) and a second detection reflecting surface (5). The first detection reflecting surface (4) and the second detection reflecting surface (5) are in the same plane. A circular non-reflecting part is provided at the center of the second detection reflecting surface (5), and the inner diameter of the non-reflecting part is smaller than the radius of the area where the infrared rays emitted by the infrared emitter (1) reach the Fresnel lens (16) fixed by the lens placer.
3. The Fresnel lens energy transfer efficiency detector according to claim 2, wherein, It further includes a frame body (6). The reflecting surface switching mechanism, the infrared emitter (1), the infrared receiving sensor (2), and the lens placer are all arranged on the frame body (6). The reflecting surface switching mechanism is located above the lens placer (3), and the infrared emitter (1) and the infrared receiving sensor (2) are both located directly below the lens placer (3).
4. The Fresnel lens energy transfer efficiency detector according to claim 3, characterized in that, The reflecting surface switching mechanism is provided with a first reflecting plate (7) and a second reflecting plate (8). The surface of the first reflecting plate (7) facing the infrared emitter (1) is the first detection reflecting surface (4), and the surface of the second reflecting plate (8) facing the infrared emitter (1) is the second detection reflecting surface (5).
5. A Fresnel lens energy transfer efficiency detector according to claim 4, characterized in that, The non-reflecting part is a through hole (9) provided on the second reflecting plate (8).
6. The Fresnel lens energy transfer efficiency detector according to claim 4, characterized in that, The non-reflecting part is vantablack coated on a circular area of the second reflecting surface.
7. A Fresnel lens energy transfer efficiency detector according to claim 4, characterized in that, The reflecting surface switching mechanism includes guide rails (10), a pusher, and an elastic member. The two guide rails (10) are provided on the frame body (6). The opposite sides of the first reflecting plate (7) are respectively slidably connected between the two ends of the two guide rails (10). The opposite sides of the second reflecting plate (8) are respectively slidably connected between the two ends of the two guide rails (10). The two guide rails (10) are parallel to each other, and the guide rails (10) are parallel to both the first reflecting plate (7) and the second reflecting plate (8). The pusher is provided on one side of the whole formed by the first reflecting plate (7) and the second reflecting plate (8) on the frame body (6), and the elastic member is provided on the side of the whole formed by the first reflecting plate (7) and the second reflecting plate (8) facing away from the pusher on the frame body (6). The pusher is used to push the whole formed by the first reflecting plate (7) and the second reflecting plate (8) towards the elastic member. When the elastic member is in a normal state, the first reflecting plate (7) is located directly above the whole formed by the infrared emitter (1) and the infrared receiving sensor (2).
8. The Fresnel lens energy transfer efficiency detector according to claim 7, wherein The pusher includes a lead screw (12), a threaded hole, and a top plate (13). The threaded hole is provided on a cross bar (14). The cross bar (14) is fixedly provided on the frame body (6). The cross bar (14) is located on the side of the whole formed by the first reflecting plate (7) and the second reflecting plate (8) facing away from the elastic member. The axis of the threaded hole is parallel to the first reflecting plate (7). The two ends of the lead screw (12) are threadedly connected to the threaded hole, and the top plate (13) is rotatably provided at one end of the lead screw (12) facing the whole formed by the first reflecting plate (7) and the second reflecting plate (8).
9. The Fresnel lens energy transfer efficiency detector according to claim 7, characterized in that The elastic member is a spring (11).
10. The Fresnel lens energy transfer efficiency detector according to claim 7, wherein Chute grooves (15) for slidably connecting with the guide rails (10) are provided on the opposite sides of the first reflecting plate (7) and the opposite sides of the second reflecting plate (8).