Detection optical path generation device and detection system

Abstract

The utility model provides a detection light path generating device and a detection system. The detection light path generation device comprises a reflection structure which comprises a first reflection medium and a second reflection medium, the first reflecting medium comprises a plurality of reflecting units which are combined on one surface of the second reflecting medium; any reflection unit has a preset optical angle; the fixing structure is provided with at least one fixing position of a to-be-detected product; the optical structure comprises a transmitting unit and a receiving unit, and the transmitting unit and the receiving unit are located on the same side of the fixing structure; the detection light beam from the transmitting unit passes through the product to be detected, is reflected by the reflection structure, passes through the product to be detected again according to a preset light path, and reaches the receiving unit. According to the utility model, by arranging the reflection structure, the detection light beam from the transmitting unit can reach the receiving unit according to the preset light path, so that the angle requirement on the light path during Fresnel lens detection is well met.

Description

Technical Field

[0001] This utility model relates to the field of optical device detection technology, specifically to a detection optical path generation device and a detection system. Background Technology

[0002] Fresnellens, also known as threaded lenses, have concentric circles of varying sizes etched on their surface. This optical structure gives Fresnellens excellent light-uniforming properties, making them widely applicable in projection displays, scientific research, and infrared detection.

[0003] Infrared transmission efficiency is a key indicator of Fresnel lens quality. To test this efficiency, a light source needs to illuminate the Fresnel lens according to the required optical path. For example, when a Fresnel lens is used in a rain sensor, existing automatic wiper functions use a set of rain sensors attached to the windshield with transparent silicone; the light beam is emitted from one side and received from the other. In this scenario, the challenge is how to construct the detection optical path so that the simulated detection path is equivalent to the actual usable optical path. Therefore, a further solution is necessary to address this issue. Utility Model Content

[0004] The present invention aims to provide a detection optical path generation device and a detection system to overcome the shortcomings of the prior art.

[0005] The objective of this application is achieved through the following technical solution:

[0006] In a first aspect, this application provides a detection optical path generation apparatus, comprising:

[0007] A reflective structure includes: a first reflective medium and a second reflective medium; the first reflective medium includes a plurality of reflective elements, the plurality of reflective elements being coupled to one surface of the second reflective medium; each of the reflective elements has a preset optical angle;

[0008] A fixing structure having at least one fixing position for the product to be tested;

[0009] An optical structure comprising: a transmitting unit and a receiving unit, wherein the transmitting unit and the receiving unit are located on the same side of the fixed structure;

[0010] The detection beam from the transmitting unit passes through the product to be tested, is reflected by the reflecting structure, and then passes through the product to be tested again according to the preset optical path before reaching the receiving unit.

[0011] As an improvement to the detection optical path generation device of this utility model, the first reflective medium is a prism, the prism includes a plurality of protrusions, and the plurality of protrusions are attached to one side of the second reflective medium.

[0012] As an improvement to the detection optical path generation device of this utility model, one side of the protrusion forms an incident surface and the other side forms an exit surface; the incident surface has a preset incident angle and the exit surface has a preset exit angle.

[0013] As an improvement to the detection optical path generation device of this utility model, the plurality of protrusions are each independently arranged and closely arranged on one side of the second reflective medium; or, the plurality of protrusions are integrally formed and continuously arranged on one side of the second reflective medium.

[0014] As an improvement to the detection optical path generation device of this utility model, the second reflective medium is a reflective film.

[0015] As an improvement to the detection optical path generation device of this utility model, the reflective film is a PET film.

[0016] As an improvement to the detection optical path generation device of this utility model, the transmitting unit is an infrared transmitter; the receiving unit is an infrared receiving sensor.

[0017] As an improvement to the detection optical path generation device of this utility model, the fixing structure is a fixing seat, the fixing seat is provided with a fixing groove for mounting the product to be tested, and the fixing groove is also provided with a hollow area to facilitate the passage of the detection beam.

[0018] As an improvement to the detection optical path generation device of this utility model, a light-shielding structure is provided between the optical structure and the fixed structure, and / or between the fixed structure and the reflective structure.

[0019] As an improvement to the detection optical path generation device of this utility model, the light-shielding structure is a mask, which includes a light-shielding part and a light-transmitting part; the mask is disposed near the incident surface of the product to be detected, or the exit surface of the product to be detected, or the incident surface of the reflective structure.

[0020] As an improvement to the detection optical path generation device of this utility model, the detection optical path generation device further includes a hollow fixing frame that can cooperate with the fixing structure; the inner side of the hollow fixing frame has a slot that facilitates the disassembly and connection of the mask.

[0021] As an improvement to the detection optical path generation device of this utility model, the light-shielding part of the mask is provided with a low-reflection coating.

[0022] Secondly, this application provides a detection system, which includes:

[0023] The detection optical path generation device as described above;

[0024] The host computer transmits signals with the receiving unit and can provide feedback on the detection results based on the signals sent by the signal unit.

[0025] Compared with the prior art, the beneficial effects of this utility model are:

[0026] (1) By setting a reflection structure, this utility model enables the detection beam from the transmitting unit to reach the receiving unit according to the preset optical path, so that the simulated test optical path is equivalent to the actual use optical path, thereby improving the accuracy of lens detection.

[0027] (2) The reflective structure has a first reflective medium and a second reflective medium, and the first reflective medium includes a plurality of reflective units with a preset optical angle. Thus, through the synergistic effect of the plurality of reflective units and the second reflective medium as a whole, the detection beam can reach the receiving unit according to the preset optical path.

[0028] (3) By setting the optical angle, number and position of the reflective unit in the first reflective medium, the emission angle of the detection beam can be flexibly adjusted, which is beneficial to meet the construction requirements of different detection optical paths.

[0029] (4) The present invention also has a light-shielding structure, which can partially block the Fresnel lens, so that the detection light path only passes through a part of the Fresnel lens. This is beneficial for distinguishing different areas of the Fresnel lens, and thus can accurately locate the area of ​​the Fresnel lens with quality problems during detection.

[0030] (5) When the light-shielding structure is a mask, a coating capable of absorbing light beams within a preset wavelength range can be applied to the mask. This avoids interference from reflected light generated by the mask on the detection. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a plan view of the detection optical path generation device in Embodiment 1;

[0033] Figure 2 This is a partially enlarged schematic diagram of one embodiment of the transmitting unit in Example 1;

[0034] Figure 3 This is a partially enlarged schematic diagram of another embodiment of the transmitting unit in Example 1;

[0035] Figure 4 This is a plan view of the detection optical path generation device in Example 2;

[0036] Figure 5 This is a top view of the light-shielding structure installed in the hollow fixing frame in Embodiment 2;

[0037] Figure 6 This is a plan view of the detection system in Embodiment 3, which includes the detection optical path generation device in Embodiment 1;

[0038] Figure 7 This is a plan view of the detection system in Embodiment 3, which includes the detection optical path generation device in Embodiment 2. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] This invention, by setting a reflection structure, enables the detection beam from the transmitting unit to reach the receiving unit along a preset optical path, thus effectively meeting the angle requirements of the optical path during Fresnel lens testing. Furthermore, by setting the optical angle, number, and position of the reflection units in the first reflecting medium, the emission angle of the detection beam can be flexibly adjusted, thereby enabling the rapid and accurate completion of the optical path construction requirements under different testing conditions.

[0041] Guided by this technical concept, the technical solution of this utility model will be illustrated below with reference to specific embodiments.

[0042] Example 1

[0043] This embodiment provides a detection optical path generation device, which can be used to build a detection optical path during Fresnel lens quality testing, thereby enabling the Fresnel lens to perform infrared transmission efficiency testing under an optical path that meets the test conditions.

[0044] like Figure 1 As shown, the detection optical path generation device 100 of this embodiment includes: a reflection structure 11, an optical structure 12, and a fixing structure 13.

[0045] The fixing structure 13 is used to install and fix the Fresnel lens 101 to be tested, so that the Fresnel lens 101 is stably set at the position to be tested.

[0046] The fixing structure 13 is located between the reflecting structure 11 and the optical structure 12, thus facilitating the placement of the Fresnel lens 101 in the optical path between the optical structure 12 and the reflecting structure 11. To achieve the mounting and fixing of the Fresnel lens 101, the fixing structure 13 has at least one fixing position for the Fresnel lens. For example, when quality inspection of two Fresnel lenses is required, two fixing positions can be provided side-by-side. In this case, the inspection beam passes through one Fresnel lens, is reflected by the reflecting structure 11, and then enters the other Fresnel lens.

[0047] In one embodiment, the fixing structure 13 is a fixing base. In this case, the fixing position on the fixing base is a fixing groove 131, in which the Fresnel lens 101 to be tested can be placed. At least one side of the fixing groove 131 abuts against the Fresnel lens 101 to limit the Fresnel lens 101. Furthermore, the fixing groove 131 is also provided with a hollow area to facilitate the passage of the detection beam.

[0048] The optical structure 12 is used to emit and receive the detection beam to achieve a closed loop in the detection optical path.

[0049] The optical structure 12 includes a transmitting unit 121 and a receiving unit 122. The transmitting unit 121 and the receiving unit 122 are arranged on the same side of the fixed structure 13 according to the required positions of transmitting and receiving the beam.

[0050] The emitting unit 121 is used to emit a detection beam with a fixed power. In one embodiment, the emitting unit 121 can be an infrared emitter. Specifically, an infrared emitting diode can be used. In this case, an LED emitter can be an infrared emitter. Thus, when the conical detection beam emitted by the emitting unit 121 passes through the Fresnel lens to be detected, it forms a vertically upward detection beam. When it exits from the Fresnel lens to be detected, it is projected at a certain angle onto the incident surface of the reflecting structure 11.

[0051] The receiving unit 122 is used to receive the detection beam reflected by the reflecting structure 11 and emitted again through the Fresnel lens 101 to be tested. In one embodiment, the receiving unit 122 is an infrared receiving sensor. In this case, it can receive the transmitted infrared light. Since the transmitting unit 121 emits a detection beam of fixed power, the efficiency of the Fresnel lens 101 as a light guide in the whole system can be obtained, and then the quality of the Fresnel lens 101 can be judged by using the infrared transmission efficiency value.

[0052] like Figure 2 ,3 As shown, the reflection structure 11 is used to ensure that the detection beam from the transmitting unit 121 reaches the receiving unit 122 along a preset optical path, thus well satisfying the angle requirements of the optical path when the Fresnel lens 101 is detecting.

[0053] Specifically, the reflective structure 11 includes a first reflective medium 111 and a second reflective medium 112. The first reflective medium 111 includes a plurality of reflective units 1111, which are coupled to one side of the second reflective medium 112; each reflective unit 1111 has a preset optical angle.

[0054] Thus, the light beam emitted from the Fresnel lens 101 to be tested passes through the reflection unit 1111 in the incident region, the second reflection medium 112, and the reflection unit 1111 in the exit region. After being reflected by the designed optical angle and the overall synergistic effect of the second reflection medium 112, it can pass through the Fresnel lens 101 to be tested again according to the preset optical path and reach the receiving unit 122.

[0055] In one embodiment, the first reflective medium 111 is a prism. In this case, the prism includes several protrusions, which are the reflective units 1111 as described above. These protrusions are attached to one surface of the second reflective medium 112. The advantage of using a prism is that by setting the optical angle, number, and position of the protrusions, the exit angle of the detection beam can be flexibly adjusted, thus facilitating the construction of different detection optical paths.

[0056] The optical angle of the protrusion includes the incident angle and / or the exit angle. To set the optical angle, one side of the protrusion forms the incident surface, and the other side forms the exit surface; the incident surface has a preset incident angle, and the exit surface has a preset exit angle. Therefore, the incident and exit angles can be flexibly designed by setting the tilt angles of the two sides of the protrusion. Correspondingly, the protrusion can be a conical structure. Regarding the specific numerical range of the optical angle, the incident angle ranges from 0° to 90°; the exit angle ranges from 0° to 90°.

[0057] Depending on the molding method, the number and location of the protrusions can be set independently or integrally. In one embodiment, several protrusions are each set independently and arranged closely on one side of the second reflective medium 112. In this embodiment, each protrusion is equivalent to a small prism, and the small prisms can be arranged in an array closely on one side of the second reflective medium 112.

[0058] In another embodiment, the protrusions can also be integrally formed on a single prism. In this case, the protrusions are integrally formed and continuously disposed on one side of the second reflective medium 112. For example, the protrusions can be arranged in an array continuously on one side of the second reflective medium 112.

[0059] The second reflective medium 112 works in conjunction with the first reflective medium 111 to reflect the light beam to be detected. In one embodiment, the second reflective medium 112 is a reflective film. For example, the reflective film can be a PET film. In this case, one side of the PET film is the incident surface, and the other side is the reflective surface. After being guided by several protrusions, the detection light beam enters the PET film from the incident surface and is projected onto its reflective surface for reflection. After exiting from the incident surface and passing through several protrusions, it can exit at a preset angle.

[0060] Example 2

[0061] like Figure 4 As shown, this embodiment provides a detection optical path generation device, which includes all the structures of the detection optical path generation device described in Embodiment 1. The difference between the two is that the detection optical path generation device 200 described in this embodiment also includes a light-shielding structure 21.

[0062] Specifically, the light-shielding structure 21 is disposed between the optical structure 22 and the fixed structure 23, and / or between the fixed structure 23 and the reflective structure 24. Thus, the light-shielding structure 21 can partially block the Fresnel lens 201 to be tested, thereby ensuring that the detection optical path only passes through a portion of the Fresnel lens 201. This facilitates the differentiation of different areas of the Fresnel lens 201, enabling precise location of areas with quality problems during testing.

[0063] like Figure 5 As shown, the light-shielding structure 21 in this embodiment can be configured in both a detachable and a movable manner. When the light-shielding structure 21 is configured in a detachable manner, a hollow fixing frame 25 that can be placed inside the fixing structure 23 can be provided. The inner side of the hollow fixing frame 25 has a slot for easy disassembly and reassembly of the light-shielding structure 21. In this case, in order to conveniently block the corresponding area in the Fresnel lens 201, the light-shielding structure 21 can be configured with different shapes to match the area that needs to be blocked.

[0064] When the light-shielding structure 21 is installed in a movable manner, a hollow fixing frame 25 that can be pivotally placed inside the fixed structure 23 can be provided. The inner side of the hollow fixing frame 25 has a slot for fixing the light-shielding structure 21. At this time, by rotating the hollow fixing frame 25, the light-shielding structure 21 can be moved to the corresponding area in the Fresnel lens 201 for blocking.

[0065] In one embodiment, the light-shielding structure 21 is a mask, which includes a light-shielding portion and a light-transmitting portion. In this case, the mask is positioned close to the incident surface of the Fresnel lens 201 to be tested, or the exit surface of the Fresnel lens 201 to be tested, or the incident surface of the reflecting structure 24. When the Fresnel lens 201 to be tested is circular, the shape of the mask can be set to a fan shape, etc. Correspondingly, the arc-shaped edge of the fan-shaped mask is inserted into a slot inside the hollow fixing frame 25.

[0066] Furthermore, the light-shielding portion of the mask is also provided with a coating capable of absorbing light beams within a preset wavelength range. This avoids interference from reflected light generated by the mask on the detection. It should be noted that the above-mentioned coating is an existing coating material, and those skilled in the art can select appropriate materials and apply them to the technical solution of this embodiment. For example, the mask surface is coated with a low-reflection CNT (carbon nanotube) coating.

[0067] Example 3

[0068] This embodiment provides a detection system that can detect the infrared transmission efficiency of a Fresnel lens and then provide feedback on the quality detection results of the Fresnel lens.

[0069] like Figure 6 , 7 As shown, the detection system 300 of this embodiment includes: a host 31 and detection optical path generating devices 100 and 200 as described in Embodiment 1 or Embodiment 2. The host 31 transmits signals with the receiving units in the detection optical path generating devices 100 and 200, and can provide feedback on the detection results based on the signals sent by the signal units.

[0070] Specifically, the signal fed back by the receiving unit includes the efficiency of the Fresnel lens as a light guide in the whole system. Since the transmitting unit emits a detection beam with a fixed power, the host 31 can compare whether the difference between the light guiding efficiency of the Fresnel lens and the fixed power emitted by the initial transmitting unit is within a preset range, and thus determine the influence of the Fresnel lens under test on the transmission efficiency, so as to feed back the corresponding detection results.

[0071] Furthermore, it should be noted that the host 31 used for judging the quality of the Fresnel lens is equipped with a detection program, which can be any program in the prior art. Those skilled in the art can select the appropriate program according to actual needs and load it into the host 31. The detection program is not an aspect improved by this utility model and will not hinder the implementation of the technical solution of this embodiment.

[0072] In summary, by setting a reflection structure, this utility model enables the detection beam from the transmitting unit to reach the receiving unit along a preset optical path, making the simulated test optical path equivalent to the actual use optical path, thus improving the accuracy of lens detection.

[0073] The reflective structure has a first reflective medium and a second reflective medium, and the first reflective medium includes a plurality of reflective elements with preset optical angles. Thus, through the synergistic effect of the plurality of reflective elements and the second reflective medium as a whole, the detection beam can reach the receiving unit along a preset optical path.

[0074] By setting the optical angle, number, and position of the reflective units in the first reflective medium, the emission angle of the detection beam can be flexibly adjusted, which is beneficial to meeting the construction requirements of different detection optical paths.

[0075] This invention also features a light-shielding structure that partially blocks the Fresnel lens, allowing the detection light path to pass only through a portion of the Fresnel lens. This facilitates the differentiation of different areas of the Fresnel lens, enabling precise location of areas with quality problems during detection.

[0076] When the light-shielding structure is a mask, a low-reflection coating can be applied to the mask. This low-reflection coating can absorb light beams within a preset wavelength range, such as CNT (carbon nanotube) coating. This avoids interference from reflected light generated by the mask on the detection process.

[0077] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0078] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A detection optical path generation device, characterized in that, include: A reflective structure (11) includes: a first reflective medium (111) and a second reflective medium (112); the first reflective medium (111) includes a plurality of reflective units (1111), the plurality of reflective units (1111) being coupled to one side of the second reflective medium (112); each of the reflective units (1111) has a preset optical angle; A fixing structure (13) having at least one fixing position for the product to be tested; An optical structure (12) includes a transmitting unit (121) and a receiving unit (122), wherein the transmitting unit (121) and the receiving unit (122) are located on the same side of the fixed structure (13); The detection beam from the transmitting unit (121) passes through the product to be tested and is reflected by the reflecting structure (11). After passing through the product to be tested again according to the preset optical path, it reaches the receiving unit (122).

2. The detection optical path generation device according to claim 1, characterized in that, The first reflective medium (111) is a prism, which includes a plurality of protrusions, which are attached to one side of the second reflective medium (112).

3. The detection optical path generation device according to claim 2, characterized in that, One side of the protrusion forms an incident surface, and the other side forms an exit surface; the incident surface has a preset incident angle, and the exit surface has a preset exit angle.

4. The detection optical path generation device according to claim 2, characterized in that, The plurality of protrusions are each independently provided and closely arranged on one side of the second reflective medium (112); or, the plurality of protrusions are integrally formed and continuously provided on one side of the second reflective medium (112).

5. The detection optical path generation apparatus according to any one of claims 1 to 4, characterized in that, The second reflective medium (112) is a reflective film.

6. The detection optical path generation device according to claim 5, characterized in that, The reflective film is a PET film.

7. The detection optical path generation device according to claim 1, characterized in that, The transmitting unit (121) is an infrared transmitter; the receiving unit (122) is an infrared receiving sensor.

8. The detection optical path generation device according to claim 1, characterized in that, The fixing structure (13) is a fixing seat, and the fixing seat is provided with a fixing groove (131) for installing the product to be tested. The fixing groove (131) is also provided with a hollow area to facilitate the passage of the detection beam.

9. The detection optical path generation device according to claim 1, characterized in that, A light-shielding structure (21) is provided between the optical structure (12) and the fixed structure (13), and / or between the fixed structure (13) and the reflective structure (11).

10. The detection optical path generation device according to claim 9, characterized in that, The light-shielding structure (21) is a mask, which includes a light-shielding part and a light-transmitting part; the mask is positioned close to the incident surface of the product to be tested, the exit surface of the product to be tested, or the incident surface of the reflective structure (11).

11. The detection optical path generation device according to claim 10, characterized in that, The detection optical path generation device also includes a hollow fixing frame (25) that can cooperate with the fixing structure (23); the inner side of the hollow fixing frame (25) has a slot that facilitates the disassembly and connection of the mask.

12. The detection optical path generation device according to claim 10, characterized in that, The light-shielding portion of the mask is provided with a low-reflection coating.

13. A detection system, characterized in that, include: The detection optical path generation apparatus as described in any one of claims 1 to 12; The host computer transmits signals with the receiving unit and can provide feedback on the detection results based on the signals sent by the signal unit.

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