CN218725185U - Light spot uniformity testing device - Google Patents
Light spot uniformity testing device Download PDFInfo
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- CN218725185U CN218725185U CN202221668324.9U CN202221668324U CN218725185U CN 218725185 U CN218725185 U CN 218725185U CN 202221668324 U CN202221668324 U CN 202221668324U CN 218725185 U CN218725185 U CN 218725185U
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Abstract
The application discloses facula homogeneity testing arrangement relates to optics and tests technical field. The light spot uniformity testing device comprises a diffuse reflection plate, a light filtering unit and an image acquisition and analysis component which are sequentially arranged along a light path; the diffuse reflection plate is attached to a light outlet surface of a product to be detected, light beams emitted from the light outlet surface of the product to be detected penetrate through the diffuse reflection plate and the light filtering unit, and the image acquisition and analysis assembly receives light spots formed by the light beams penetrating through the light filtering unit and analyzes uniformity of the light spots. The reliability of the light spot uniformity test and the accuracy of the test result can be improved.
Description
Technical Field
The application relates to the technical field of optical testing, in particular to a light spot uniformity testing device.
Background
In the medical and American industry, certain skin contact induction products need to determine the light spot uniformity at the light outlet of the product, so that a reliable basis is provided for subsequent related use. Therefore, before use, the uniformity of the light spot at the light outlet needs to be tested.
During testing, on one hand, the light spot form needs to be accurately collected, on the other hand, the light spot uniformity at the light outlet needs to be determined, and due to the fact that the light spot size at the light outlet is relatively large, photographic paper is mostly adopted as a carrier for collecting the light spot form during testing at present, and then the light spot uniformity at the light outlet is determined through manual judgment. By adopting the mode, the errors caused by different damage thresholds of different photographic papers are relatively large, the efficiency is relatively low when the human eyes judge by visual inspection, and the large errors are also brought.
SUMMERY OF THE UTILITY MODEL
The application aims to provide a facula homogeneity testing arrangement can promote the reliability of facula homogeneity test and the accuracy of test result.
The embodiment of the application is realized as follows:
the embodiment of the application provides a light spot uniformity testing device, which comprises a diffuse reflection plate, a filtering unit and an image acquisition and analysis component which are sequentially arranged along a light path; the diffuse reflection plate is attached to a light outlet surface of a product to be detected, light beams emitted from the light outlet surface of the product to be detected penetrate through the diffuse reflection plate and the light filtering unit, and the image acquisition and analysis assembly receives light spots formed by the light beams penetrating through the light filtering unit and analyzes uniformity of the light spots.
Optionally, the light spot uniformity testing device further comprises a power supply assembly, and the power supply assembly is connected with the product to be tested and the image acquisition and analysis assembly respectively, and is used for supplying power to the product to be tested and sending a trigger acquisition signal to the image acquisition and analysis assembly.
Optionally, the power supply assembly responds to a pulse signal or a key trigger signal to send the trigger acquisition signal and supplies power to the product to be tested.
Optionally, the image acquisition and analysis assembly comprises an image acquisition assembly and an image analysis assembly which are connected with each other, the image acquisition assembly is used for receiving light spots transmitted by the light beams in the light filtering unit, and the image analysis assembly is used for performing uniformity analysis on the light spots.
Optionally, the image capturing assembly includes a lens and a photosensitive unit corresponding to the lens.
Optionally, the photosensitive unit is a CCD image sensor or a CMOS image sensor.
Optionally, a distance between the filtering unit and the lens is less than or equal to 1mm.
Optionally, the filtering unit includes an attenuation plate for reducing a transmittance of the light beam through the filtering unit.
Optionally, the filter unit further includes a filter, and the filter is configured to transmit light in a preset wavelength range.
Optionally, the diffuse reflection plate includes a transparent substrate, and diffuse reflection layers disposed on two opposite sides of the transparent substrate, where a material of the diffuse reflection layer includes one of polytetrafluoroethylene, barium sulfate, and gold.
The beneficial effects of the embodiment of the application include:
the light spot uniformity testing device provided by the embodiment of the application, through the diffuse reflection plate, the filtering unit and the image acquisition and analysis component which are sequentially arranged along the light path, when the light beam is emitted from the light-emitting surface of a product to be tested attached to the diffuse reflection plate, the light beam sequentially penetrates through the diffuse reflection plate and the filtering unit to form the light spot, the light spot is acquired by the image acquisition and analysis component, so that the uniformity of the light spot is analyzed through the image acquisition and analysis component, when the uniformity of the light spot is analyzed, the gray value of each pixel in the whole light spot can be determined, and the uniformity of the light spot is calculated and determined according to the gray value of each pixel. When the mode is adopted for testing, the diffuse reflection plate is attached to the light emitting surface of a product to be tested, the simulation of the state of skin in the actual use process is facilitated, the transmission effect on light beams is realized on the basis of diffuse reflection, the light beams transmitted through the diffuse reflection plate are subjected to the filtering effect of the filtering unit to reduce the transmittance of incident light, and therefore the light spots are effectively collected by the image collecting and analyzing assembly.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a light spot uniformity testing apparatus according to an embodiment of the present disclosure;
fig. 2 is a second schematic structural diagram of a light spot uniformity testing apparatus according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram illustrating an electrical connection between a power supply assembly and an image acquisition and analysis assembly according to an embodiment of the present application.
Icon: 105-a product to be tested; 110-diffuse reflector; 120-a filter unit; 130-an image acquisition analysis component; 132-an image capture component; 134-an image analysis component; 140-power supply components.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it should be noted that the terms "center", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally placed when products of the application are used, and are only used for convenience in describing the application and simplifying the description, but do not indicate or imply that the devices or elements to be referred must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application.
In the description of the present application, it should also be noted that, unless expressly stated or limited otherwise, the terms "disposed" and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In the medical and American industry, certain skin contact sensing products need to determine the light spot uniformity at the light outlet of the product, so that a reliable basis is provided for subsequent related use. During testing, on one hand, the light spot form needs to be accurately collected, on the other hand, the light spot uniformity at the light outlet needs to be determined, and due to the fact that the light spot size at the light outlet is relatively large, photographic paper is mostly adopted as a carrier for collecting the light spot form during testing at present, and then the light spot uniformity at the light outlet is determined through manual judgment. By adopting the mode, the errors caused by different damage thresholds of different photographic papers are relatively large, the efficiency is relatively low when the human eyes judge by visual inspection, and the large errors are also brought. In view of the above problems, embodiments of the present application provide the following technical solutions to overcome the above problems.
Referring to fig. 1, the present embodiment provides a device for testing uniformity of a light spot, which includes a diffuse reflection plate 110, a filtering unit 120, and an image collecting and analyzing assembly 130, which are sequentially disposed along a light path; the diffuse reflection plate 110 is attached to the light exit surface of the product 105 to be measured, a light beam emitted from the light exit surface of the product 105 to be measured penetrates through the diffuse reflection plate 110 and the filtering unit 120, and the image acquisition and analysis assembly 130 receives a light spot formed by the light beam penetrating through the filtering unit 120 and performs uniformity analysis on the light spot.
Specifically, when testing the light spot, the light exit surface of the product 105 to be tested needs to emit light, and the electric energy required by the light beam emitted from the product 105 to be tested may be electric energy owned by the product, such as a battery, or may be electric energy supplied from the outside, so as to ensure the normal use of the product 105 to be tested.
The diffuse reflection plate 110 is mainly used for transmitting and diffusely reflecting the light beam emitted from the light-emitting surface so as to better simulate the form of the light-emitting surface irradiating on the skin and ensure the accuracy of the test, and in addition, the diffuse reflection plate 110 is attached to the light-emitting surface of the product 105 to be tested so as to simulate the distance between the light-emitting surface and the skin in the actual use process. By adopting the mode, the uniformity of the light spots when the light spots on the light-emitting surface of the product 105 to be tested directly act on the object (skin) can be effectively tested, so that the test result is closer to the real situation. The filter unit 120 is used to transmit light in a specific wavelength range, block light in other wavelength ranges, and reduce transmittance of incident light. For example, in the embodiment of the present application, light (such as blue light) with a specific wavelength range is emitted from the light emitting surface of the product 105 to be tested, so as to achieve a corresponding effect. Through setting up filtering unit 120, be favorable to reducing the beam intensity who sees through filtering unit 120, play the effect of protection image acquisition analysis subassembly 130, avoid leading to components and parts to damage because of the light intensity that sees through filtering unit 120 is too strong, be favorable to guaranteeing the collection effect to promote the accuracy of test.
According to the light spot uniformity testing device provided by the embodiment of the application, through the diffuse reflection plate 110, the filtering unit 120 and the image acquisition and analysis assembly 130 which are sequentially arranged along the light path, when the light beam is emitted from the light-emitting surface of the product 105 to be tested attached to the diffuse reflection plate 110, the light beam sequentially penetrates through the diffuse reflection plate 110 and the filtering unit 120 to form light spots, and the light spots are acquired by the image acquisition and analysis assembly 130, so that the uniformity of the light spots can be analyzed through the image acquisition and analysis assembly 130, when the uniformity of the light spots is analyzed, the gray value of each pixel in the whole light spots can be determined, and the uniformity of the light spots can be calculated and determined according to the gray value of each pixel. When the method is adopted for testing, the diffuse reflection plate 110 is attached to the light-emitting surface of the product 105 to be tested, the simulation of the state of the skin in the actual use process is facilitated, the transmission effect on the light beams is realized on the basis of finishing diffuse reflection, the light beams transmitted through the diffuse reflection plate 110 are filtered by the light filtering unit 120 to reduce the transmittance of incident light, so that the light spots are effectively collected by the image collecting and analyzing assembly 130, and compared with the conventional method in which photographic paper is used as a carrier for collecting the light spots, and the artificial judgment mode is adopted, the reliability of the light spot uniformity test and the accuracy of the test result can be greatly improved.
As shown in fig. 2, the light spot uniformity testing apparatus further includes a power supply assembly 140, and the power supply assembly 140 is connected to the product 105 to be tested and the image acquisition and analysis assembly 130, and is configured to supply power to the product 105 to be tested and send a trigger acquisition signal to the image acquisition and analysis assembly 130.
Specifically, when testing the uniformity of the light spots, the power supply module 140 can be used for supplying power to the product 105 to be tested, and sending a trigger acquisition signal to the image acquisition and analysis module 130, so that when the product 105 to be tested is powered to emit a light beam, the image acquisition and analysis module 130 can acquire the corresponding light spots, thereby being beneficial to improving the acquisition efficiency and reducing invalid acquisition.
In an alternative embodiment of the present application, the power supply component 140 sends a trigger acquisition signal in response to the pulse signal or the key trigger signal and supplies power to the product 105 to be tested.
For example, the power supply module 140 may adopt an automatic mode or a manual trigger mode, and in the case of adopting the automatic mode, the power supply module 140 may respond to the corresponding pulse signal to trigger current output, and generate a TTL synchronization signal (trigger acquisition signal), so that the power supply module 140 supplies power to the product 105 to be detected, and when the product 105 to be detected emits a light beam, the image acquisition and analysis module 130 can respond to the trigger acquisition signal to acquire a corresponding light spot. When the manual trigger mode is adopted, the power supply component 140 may trigger current output in response to the key trigger signal, and generate a TTL synchronization signal (trigger acquisition signal), so that the power supply component 140 supplies power to the product 105 to be detected, and the image acquisition and analysis component 130 can acquire a corresponding light spot in response to the trigger acquisition signal while realizing light beam emission of the product 105 to be detected. In practical application, the device can be flexibly set according to requirements. By adopting the above mode, the trigger acquisition signal of the power supply assembly 140 is utilized to trigger the corresponding image acquisition analysis assembly 130 to acquire, so that the acquisition result and the light spot output of the product 105 to be detected are ensured to be synchronous, and invalid acquisition is reduced.
Referring to fig. 3, the image collecting and analyzing assembly 130 includes an image collecting assembly 132 and an image analyzing assembly 134 connected to each other, the image collecting assembly 132 is configured to receive light spots transmitted by the light beam in the filtering unit 120, and the image analyzing assembly 134 is configured to perform uniformity analysis on the light spots.
Specifically, the image collecting and analyzing assembly 130 is mainly used for collecting light spots and analyzing the collected light spots. The power supply component 140 is connected to the image capturing component 132 to send a trigger capturing signal to the image capturing component 132, and the image capturing component 132 can respond to the trigger capturing signal of the power supply component 140 to capture the light spot. The image analysis component 134 can be operated by a computer, and the image of the light spot collected by the image collection component 132 is transmitted to the image analysis component 134, so that the gray value of each pixel in the whole light spot can be calculated by the image analysis component 134, and the uniformity of the light spot can be calculated and determined according to the gray value of each pixel.
In an alternative embodiment of the present application, the image capturing assembly 132 includes a lens and a photosensitive unit corresponding to the lens.
Wherein, image acquisition subassembly 132 passes through the setting of camera lens, collection facula information that can be better to make facula information convert the light signal of facula into required signal of telecommunication in induction element department. In addition, the lens can adopt a focusing lens and a lens with a fixed focal length, can be flexibly arranged according to actual needs, and only needs to enable the light spots to converge to the light sensing unit.
In an alternative embodiment of the present application, the light sensing unit is a CCD image sensor or a CMOS image sensor.
The CCD image sensor uses a photoelectric conversion device that converts light into electric charges, which are converted into digital signals by an analog-to-digital converter chip, and the digital signals are stored by a flash memory or a built-in hard disk card inside the image acquisition assembly 132 after being compressed, so that data can be easily transmitted to a computer. The CMOS image sensor generally comprises an image sensor cell array, a row driver, a column driver, a timing control logic, an AD converter, a data bus output interface, a control interface, etc., which are usually integrated on the same silicon chip. When light irradiates the image sensing unit array, photoelectric effect is generated, and response charges are generated in the image sensing units and converted into digital image signals to be output.
In an alternative embodiment of the present application, the distance between the filter unit 120 and the lens is less than or equal to 1mm.
For example, the distance between the filter unit 120 and the lens may be 0mm, 0.5mm, or 1mm, that is, the lens is infinitely close to the filter unit 120. By adopting the above manner, the light beam emitted from the filtering unit 120 can directly enter the lens, so that the interference of the external environment light to the test result is avoided.
In an alternative embodiment of the present application, the filter unit 120 includes an attenuation plate for reducing the transmittance of the light beam through the filter unit 120.
By adopting the above mode, the brightness of the light beam penetrating through the filtering unit 120 can be ensured, and the brightness is ensured within a reasonable range capable of being acquired by the image acquisition assembly 132, so that the quality of the acquired light spots is ensured.
In an optional embodiment of the present application, the filtering unit 120 further includes a filter, and the filter is configured to transmit light in a predetermined wavelength range.
The optical filter of the present application may be an absorption type optical filter, and compared to a reflection type optical filter, in practical application, the optical filter is beneficial to reducing reflection of light beams between the optical filtering units 120, has a high damage threshold and little stray light, and is beneficial to improving the optical filtering performance. In addition, the absorption filter is used for absorbing light outside the preset wavelength range and transmitting the light within the preset wavelength range, so that the light beam emitted from the light-emitting surface of the product 105 to be measured can smoothly pass through the filtering unit 120 and be collected by the image collecting assembly 132. It can be understood that when the light-emitting surface of the product 105 to be detected has multiple colors of light, the light with a specific color (within a range) can be detected.
In an alternative embodiment of the present application, the diffusive reflective plate 110 includes a transparent substrate, and diffusive reflective layers disposed on opposite sides of the transparent substrate, the material of the diffusive reflective layers including one of polytetrafluoroethylene, barium sulfate, and gold. Therefore, compared with other arrangement forms, the diffuse reflection plate 110 of the embodiment of the present application has a smaller homogenization effect on the original light spot and a smaller broadening effect on the original light spot, so that the real state of the original light spot can be better fed back.
In an alternative embodiment of the present application, the transmittance of the diffusive reflective plate 110 is 5% to 50%. In practical application, the brightness of the light beams passing through the diffuse reflection plate 110 and the filtering unit 120 can be adjusted according to actual needs, so that the brightness of the light beams passing through the diffuse reflection plate 110 and the filtering unit 120 is in a proper range, and the collection is prevented from being influenced by weak light intensity or strong light intensity, so that the collection effect is ensured.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A light spot uniformity testing device is characterized by comprising a diffuse reflection plate, a filtering unit and an image acquisition and analysis component which are sequentially arranged along a light path; the diffuse reflection plate is attached to a light outlet surface of a product to be detected, light beams emitted from the light outlet surface of the product to be detected penetrate through the diffuse reflection plate and the light filtering unit, and the image acquisition and analysis assembly receives light spots formed by the light beams penetrating through the light filtering unit and analyzes uniformity of the light spots.
2. The light spot uniformity testing device of claim 1, further comprising a power supply component, wherein the power supply component is connected to the product to be tested and the image acquisition and analysis component, respectively, and is configured to supply power to the product to be tested and send a trigger acquisition signal to the image acquisition and analysis component.
3. The light spot uniformity testing device of claim 2, wherein the power supply assembly sends the trigger acquisition signal in response to a pulse signal or a key trigger signal and supplies power to the product to be tested.
4. The light spot uniformity testing device according to any one of claims 1 to 3, wherein the image acquisition and analysis assembly comprises an image acquisition assembly and an image analysis assembly which are connected with each other, the image acquisition assembly is used for receiving the light spots transmitted by the light beams in the filtering unit, and the image analysis assembly is used for performing uniformity analysis on the light spots.
5. The light spot uniformity testing device of claim 4, wherein the image acquisition assembly comprises a lens and a photosensitive unit corresponding to the lens.
6. The light spot uniformity testing device of claim 5, wherein the light sensing unit is a CCD image sensor or a CMOS image sensor.
7. The device for testing the uniformity of the light spots according to claim 5, wherein the distance between the filter unit and the lens is less than or equal to 1mm.
8. The device for testing the uniformity of the light spots according to any one of claims 1 to 3, wherein the filter unit comprises an attenuator for reducing the transmittance of the light beams through the filter unit.
9. The device for testing the uniformity of the light spots according to claim 8, wherein the filter unit further comprises a filter for transmitting light in a predetermined wavelength range.
10. The device for testing the uniformity of the light spot according to any one of claims 1 to 3, wherein the diffuse reflection plate comprises a transparent substrate, and diffuse reflection layers arranged on two opposite sides of the transparent substrate, and the material of the diffuse reflection layers comprises one of polytetrafluoroethylene, barium sulfate and gold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221668324.9U CN218725185U (en) | 2022-06-29 | 2022-06-29 | Light spot uniformity testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221668324.9U CN218725185U (en) | 2022-06-29 | 2022-06-29 | Light spot uniformity testing device |
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| Publication Number | Publication Date |
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| CN218725185U true CN218725185U (en) | 2023-03-24 |
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| CN202221668324.9U Active CN218725185U (en) | 2022-06-29 | 2022-06-29 | Light spot uniformity testing device |
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| CN (1) | CN218725185U (en) |
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Effective date of registration: 20230815 Address after: Room 101, Building 1, No. 49 Jingyi Road, Dongcheng Street, Dongguan City, Guangdong Province, 523015 Patentee after: Torchlight (Dongguan) Microoptics Co.,Ltd. Address before: No. 56, zhangbaliu Road, high tech Zone, Xi'an, Shaanxi 710000 Patentee before: Focuslight Technologies Inc. |
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