Optical imaging testing device for projector
By integrating a spectrometer, color luminance imager, and data processing module into an optical imaging test device, the problems of cumbersome equipment and errors in projector testing have been solved, enabling efficient and accurate projector performance testing.
Patent Information
- Application Number
- CN202520626263.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-03
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-04-03
AI Technical Summary
Existing projector performance testing requires the coordinated operation of multiple devices, which leads to cumbersome operation, easy introduction of errors, and low efficiency, making it difficult to meet the needs of efficient and accurate testing.
Design an optical imaging test device that integrates a spectrometer, color luminance imager, and data processing module. The device collects optical data through the integrated spectrometer, color luminance imager, and converts it into illuminance indicators. Combined with a specially made diffuse reflection projection film screen and flat glass, it enables accurate testing from multiple angles and in all directions.
Simplify the testing process, improve testing efficiency, reduce costs, and achieve comprehensive and multi-angle accurate testing of projector performance, outputting complete and accurate test results.
Smart Images
Figure CN223841434U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of projector testing technology, specifically to an optical imaging testing device for projectors. Background Technology
[0002] A projector is a device that projects images or videos from a source (such as a computer or DVD player) onto a screen or other flat surface. Its working principle is primarily based on optical and electronic technologies. Optical imaging testing of a projector is a crucial step in ensuring that the device can display images correctly.
[0003] In the current field of projector performance testing, it is usually necessary to use a variety of different devices to measure different indicators. For example, a camera is used to obtain information related to the optical characteristics of the projected image, such as brightness and color; an illuminance meter is used to measure illuminance and further calculate indicators such as luminous flux; and a camera is used to capture images to determine image clarity, whether there is dirt, distortion, and other imaging-related issues.
[0004] This traditional testing method, which relies on the coordinated operation of multiple devices, not only makes the operation process extremely complicated, but also easily introduces errors during the data integration and calibration of each device, seriously affecting the accuracy of the measurement results. Furthermore, the overall testing efficiency is low, making it difficult to meet the current practical needs for efficient and accurate testing of projector performance. Utility Model Content
[0005] The purpose of this invention is to provide an optical imaging testing device for projectors, in order to solve the problems mentioned in the background art regarding the current projector testing technology on the market, such as reliance on multiple devices, cumbersome operation, easy generation of errors, and low efficiency.
[0006] To achieve the above objectives, this utility model provides the following technical solution: an optical imaging testing device for a projector, comprising an optical imaging testing device body and a projector under test. The optical imaging testing device body is provided with a dark box and a worktable, and a portion of the worktable is located inside the dark box. A guide rail is provided on the lower inner side of the dark box, and a sliding mounting seat is movably mounted on the guide rail. A flat glass plate is connected to the upper end of the sliding mounting seat, and a diffuse reflection projection film screen is attached to one side of the flat glass plate. The optical imaging testing device body is provided with an integrated spectrometer, color luminance imager, and data processing module connected by a data cable, and the data processing module is also connected to the projector under test by a data cable.
[0007] Preferably, a mounting plate is fixed to the outer side of the dark box by bolts, and the integrated spectrometer color brightness imager is placed on the mounting plate.
[0008] Preferably, a groove is provided on the upper part of the workbench located inside the dark box, and a limiting groove is installed in the groove of the workbench, and a pull-out plate is movably engaged on the limiting groove.
[0009] Preferably, one end of the pull-out plate is sealed and snapped into the dark box, and a steering adjustment plate is rotatably snapped into the upper end of the pull-out plate. A motor is embedded in the pull-out plate and fixed to the steering adjustment plate by a coupling. The projector under test is placed on the steering adjustment plate.
[0010] Preferably, the diffuse reflectance of the projection film screen is greater than 95% and the absolute value of the yellowing index is less than 0.5.
[0011] Preferably, the pixel value of the integrated spectrometer color brightness imager is selectable from 8 million to 80 million.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] 1. This optical imaging testing device for projectors simplifies the testing process. Only one data acquisition and processing analysis operation is needed to quickly obtain test results containing all key indicators, which significantly shortens the testing time for a single projector. While improving overall testing efficiency, it also effectively reduces testing costs such as manpower and time, demonstrating high economic benefits and practical value.
[0014] 2. This optical imaging testing device for projectors achieves comprehensive and multi-angle accurate testing of projector performance through the close cooperation of a color and brightness imager integrated with a spectrometer, a special screen and supporting devices, as well as a data processing module and algorithm.
[0015] 3. This optical imaging testing device for projectors breaks through the functional limitations of traditional similar equipment, realizing the key function of converting the measured brightness index into the illuminance index, and achieving a two-in-one effect in optical index measurement. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of an optical imaging testing device for a projector according to the present invention.
[0017] Figure 2 This utility model relates to an optical imaging testing device for projectors. Figure 1 Enlarged structural diagram at point A in the middle;
[0018] Figure 3 This is a top view of an optical imaging testing device for a projector according to the present invention.
[0019] In the diagram: 1. Main body of the optical imaging testing device; 2. Dark box; 3. Sliding mounting base; 4. Guide rail; 5. Worktable; 6. Projector under test; 7. Diffuse reflection projection film screen; 8. Flat glass; 9. Integrated spectrometer color luminance imager; 10. Mounting plate; 11. Data processing module; 12. Steering adjustment plate; 13. Limiting groove; 14. Pull-out plate. Detailed Implementation
[0020] 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.
[0021] Please see Figure 1-3This utility model provides a technical solution: an optical imaging testing device for a projector, comprising an optical imaging testing device body 1 and a projector 6 under test. The optical imaging testing device body 1 is provided with a dark box 2 and a worktable 5, and a part of the worktable 5 is located inside the dark box 2. A groove is formed on the upper part of the worktable 5 located inside the dark box 2, and a limiting groove 13 is engaged in the groove of the worktable 5. A pull-out plate 14 is movably engaged on the limiting groove 13. This structure allows the pull-out plate 14 to be pulled out under the positioning of the limiting groove 13, so that the pull-out plate 14 can be pulled out from the dark box 2. One end of the pull-out plate 14 is sealed and engaged with the dark box 2, and a steering adjustment plate 12 is rotatably engaged on the upper end of the pull-out plate 14. 4. An embedded motor is fixed to the steering adjustment plate 12 via a coupling. This structure allows the pull-out plate 14 to be pulled out from the dark box 2, facilitating the positioning of the projector 6 under test. By rotating the steering adjustment plate 12, the projection angle of the projector 6 under test can be adjusted, ensuring that the projector 6 can project onto the diffuse reflection projection film screen 7. The diffuse reflection projection film screen 7 has a diffuse reflectance greater than 95% and an absolute value of yellowing index less than 0.5. This structure ensures that the light projected onto the diffuse reflection projection film screen 7 can be reflected very uniformly in all directions over a large angle range, while ensuring that the color of the diffuse reflection projection film screen 7 itself exhibits extremely high purity, close to ideal white, thus ensuring highly consistent and realistic viewing from different positions. The image quality is crucial for accurately measuring various parameters of the projected image from the projector 6. A guide rail 4 is located on the lower inner side of the dark box 2, and a sliding mounting base 3 is movably mounted on the guide rail 4. A flat glass plate 8 is connected to the upper end of the sliding mounting base 3, and a diffuse reflection projection film screen 7 is adhered to one side of the flat glass plate 8. Due to the extremely high flatness of the flat glass plate 8, compared to most traditional mechanical tensioning devices, its flatness advantage is significant, providing a more stable and uniform planar foundation for light reflection. This effectively avoids deviations in light reflection caused by unevenness on the surface of the diffuse reflection projection film screen 7, thus preventing any impact on the accuracy of the measurement data. The flat glass plate 8 is mounted on the guide rail 4 via the sliding mounting base 3, allowing the diffuse reflection projection film... The distance between the screen 7 and the projector 6 under test is adjustable, which can conveniently test projectors with different projection screen sizes, meet diverse testing needs, and ensure that the light projected by the projector 6 under test can be received and reflected completely and accurately, creating favorable conditions for subsequent testing. The main body 1 of the optical imaging testing device is equipped with an integrated spectrometer color brightness imager 9 and a data processing module 11 connected by a data cable. The integrated spectrometer color brightness imager 9 has a built-in specific calibration method and a carefully designed algorithm. The integrated spectrometer color brightness imager 9 can adjust imaging parameters including focal length, exposure time, spectral acquisition range, and color and brightness measurement related parameters. Furthermore, the pixel value of the integrated spectrometer color brightness imager 9 is selectable from 8 million to 80 million.This structure, through a built-in specific calibration method and a carefully designed algorithm, enables the main body 1 of the optical imaging testing device to accurately convert the collected brightness-related data into illuminance indicators, thereby realizing the calculation and analysis of other important optical indicators such as luminous flux. The wavelength range of the integrated spectrometer color brightness imager 9 can cover the main spectral range involved in the projected light of the projector 6 under test, thus ensuring that the spectral information corresponding to different colors of light can be fully captured, laying a solid foundation for subsequent accurate analysis of color-related characteristics. Due to the high resolution of the integrated spectrometer color brightness imager 9, it can clearly distinguish subtle features in the spectrum and accurately separate light of different wavelengths. This plays a crucial role in accurately identifying color components and analyzing subtle differences in color. An indispensable feature is the high sensitivity of the integrated spectrometer color luminance imager 9, which is sufficient to detect even the weakest light signals reflected from the projected image of the projector 6. Even in relatively complex lighting environments or when there are dark areas in the image, it can still acquire complete spectral data, avoiding the omission of any information that might affect color judgment. The integrated spectrometer color luminance imager 9 has a reasonable dynamic range design, capable of simultaneously processing strong and weak signals of reflected light from brighter to darker areas, ensuring accurate measurement and recording of the spectrum across the entire range of light intensity variations in the image. Furthermore, the integrated spectrometer color luminance imager 9 possesses a high signal-to-noise ratio, meaning that the acquired spectral data contains prominent effective signals with minimal noise interference, providing a solid foundation for subsequent data processing. The processing and analysis provide clear and accurate raw spectral information. The spectral acquisition speed is fast. Compared to the traditional method of analyzing photos one by one to obtain color-related data, the integrated spectrometer color luminance imager 9 can complete spectral acquisition from different locations on the entire projected image in a short time, greatly improving testing efficiency. Its speed and accuracy are particularly prominent when testing indicators such as gamma, allowing for rapid understanding of the spectral response of the entire image and efficient analysis of the color performance and other related optical properties of the projector 6 under test. The integrated spectrometer color luminance imager 9 itself has high resolution characteristics, with pixel values selectable from 8 million to 80 million, a resolution far exceeding the current mainstream 2K resolution. With its 2048×1080 (approximately 2.07 million pixels) and 4K (3840×2160, approximately 8.3 million pixels) projector resolutions, the integrated spectrometer color luminance imager 9 can precisely distinguish extremely subtle details in the image projected by the tested projector 6. This is of great significance for testing the clarity and resolution of the tested projector 6. Whether it is for evaluating the overall image clarity or testing the detail reproduction capability under different resolution standards, it can provide extremely accurate and detailed data support, thus providing a strong guarantee for a comprehensive and accurate evaluation of the imaging performance of the tested projector 6. The integrated spectrometer color luminance imager 9 integrates the functions of a color luminance imager and a spectrometer.The system can acquire multi-dimensional data, including color, brightness, and spectrum information of the projected image from the projector 6 under test, in a single transaction. Utilizing its high-precision optical sensing and acquisition mechanism, it accurately captures the rich feature information carried by the light reflected from the specially designed diffuse reflection projection film screen 7, laying a solid data foundation for a comprehensive and accurate analysis of the projector 6's performance. The data processing module 11 is also connected to the projector 6 via a data cable. The built-in algorithm of the data processing module 11 includes preprocessing steps such as noise removal, spectral deviation correction, and color calibration of the acquired data; calculation steps to convert relevant data into optical indicators such as illuminance; and image feature judgment steps to analyze imaging indicators. The algorithm is based on a precise mathematical model and verified by a large amount of experimental data. The calibration method has been rigorously verified to ensure high-precision data conversion. The data processing module 11 outputs the projector's optical indicators, including illuminance, contrast, and luminous flux; and imaging indicators, including sharpness, image contamination, and distortion. Through the cooperation of the data processing module 11 and the integrated spectrometer color luminance imager 9, the data processing... Module 11 can receive multi-dimensional data. Its built-in algorithm, based on a rigorous mathematical model and repeatedly verified and optimized through extensive experimental data, can not only convert the received brightness-related data into complete optical index data such as illuminance, contrast, and luminous flux using the aforementioned specific calibration method, but also deeply analyze the image's imaging indicators based on the overall image clarity characteristics and pixel distribution patterns. For example, it can determine whether the image is dirty or distorted. Finally, the data processing module 11 integrates the analyzed optical indicators of the projector, such as illuminance, contrast, and luminous flux, as well as imaging indicators such as clarity, image dirtiness, and distortion, to output a complete and accurate performance test result for the tested projector 6. This provides a strong basis for users to fully understand the actual performance of the tested projector 6. The outer side of the dark box 2 is fixed with a mounting plate 10 by bolts, and the integrated spectrometer color and brightness imager 9 is placed on the mounting plate 10. This structure ensures that the integrated spectrometer color and brightness imager 9 can be reliably positioned.
[0022] Working Principle: When using this optical imaging testing device for projectors, the first step is test preparation. A specially designed diffuse reflection projection film 7 is smoothly adhered to the surface of the flat glass 8 using an adhesive process, ensuring a tight fit between the two without bubbles, wrinkles, or other issues affecting flatness. This ensures that the absolute value of the yellowing index of the diffuse reflection projection film 7 is less than 0.5, meeting the requirements for the purity of the white screen. Then, the flat glass 8 is mounted on the sliding mounting base 3, allowing it to move via the guide rail 4 to adjust the diffuse reflection projection film 7 to a suitable initial position. The distance between the diffuse reflection projection film 7 and the projector 6 under test can be adjusted. Finally, the integrated spectrometer color luminance imaging meter is activated. 9. Initialize the setup, including but not limited to adjusting imaging parameters such as focal length, exposure time, spectral acquisition range, and color and brightness measurement parameters, to ensure it is in optimal working condition for testing. Simultaneously, establish a stable communication connection between it and the data processing module 11. The mounting plate 10 is used for reliable positioning of the integrated spectrometer color and brightness imager 9. Next, position the projector 6 under test, moving the pull-out plate 14 relative to the worktable 5 under the limiting position of the limiting slot 13. Pull the pull-out plate 14 out of the dark box 2, then place the projector 6 under test on the steering adjustment plate 12. Afterward, put the pull-out plate 14 back into the dark box 2. The steering adjustment plate 12 rotates under the positioning of the pull-out plate 14, adjusting the angle of the projector 6 under test to ensure... The projector under test 6 can project onto the diffuse reflection projection film screen 7. Next, data acquisition and processing are performed. Based on the type of the projector under test 6 and the expected projection screen size, the sliding mounting base 3 moves relative to the guide rail 4 via a transmission mechanism, adjusting the distance between the diffuse reflection projection film screen 7 and the projector under test 6 to ensure it is in a suitable position. This ensures that the light projected by the projector under test 6 can be projected completely and evenly onto the specially designed screen. Then, the projector under test 6 is turned on, projecting a standard test image, such as a solid color image or a resolution test image, onto the diffuse reflection projection film screen 7. The integrated spectrometer, color luminance imager 9 collects the light information reflected back from the diffuse reflection projection film screen 7 in real time. This information includes color data and luminance data from different locations. The data, along with spectral data, forms a complete dataset and is transmitted to the data processing module 11 in real time. Upon receiving the data from the integrated spectrometer color and brightness imager 9, the data processing module 11 first preprocesses the data, performing operations such as noise removal, spectral deviation correction, and color calibration to ensure data quality and accuracy. Then, using a built-in specific algorithm, based on the acquired color, brightness, and spectral information at each point, it converts the acquired brightness-related data into optical index values such as illuminance, contrast, and luminous flux through the aforementioned specific calibration method. Simultaneously, based on the overall image sharpness characteristics and pixel distribution patterns, it analyzes the image's imaging indicators to determine the presence of dirt, distortion, or other issues.The data processing module 11 organizes the comprehensive analysis results of various optical and imaging indicators of the projector 6 under test, and outputs them in an intuitive form such as reports and visualization charts. This allows testers to easily view and evaluate whether the performance of the projector 6 meets the corresponding standards or requirements. The main body 1 of the optical imaging testing device simplifies the testing process, improves overall testing efficiency, and effectively reduces testing costs such as manpower and time, demonstrating high economic benefits and practical value, thus completing a series of tasks.
[0023] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. An optical imaging testing device for a projector, comprising an optical imaging testing device body (1) and a projector under test (6), characterized in that: The main body (1) of the optical imaging test device is provided with a dark box (2) and a worktable (5), and a part of the worktable (5) is located inside the dark box (2). A guide rail (4) is provided on the lower inner side of the dark box (2), and a sliding mounting seat (3) is movably installed on the guide rail (4). A flat glass (8) is connected to the upper end of the sliding mounting seat (3), and a diffuse reflection projection film screen (7) is pasted on one side of the flat glass (8). The main body (1) of the optical imaging test device is provided with an integrated spectrometer color brightness imager (9) and a data processing module (11) connected by a data cable, and the data processing module (11) is also connected to the projector (6) under test by a data cable.
2. The optical imaging testing device for a projector according to claim 1, characterized in that: The outer side of the dark box (2) is fixed with a mounting plate (10) by bolts, and the integrated spectrometer color brightness imager (9) is placed on the mounting plate (10).
3. The optical imaging testing device for a projector according to claim 1, characterized in that: A groove is provided above the workbench (5) on the inner side of the dark box (2), and a limiting groove (13) is installed in the groove of the workbench (5), and a pull plate (14) is movably engaged on the limiting groove (13).
4. The optical imaging testing device for a projector according to claim 3, characterized in that: One end of the pull-out plate (14) is sealed and snapped into the dark box (2), and the upper end of the pull-out plate (14) is rotatably snapped into the steering adjustment plate (12). A motor is embedded in the pull-out plate (14) and fixed to the steering adjustment plate (12) by a coupling. The projector under test (6) is placed on the steering adjustment plate (12).
5. The optical imaging testing device for a projector according to claim 1, characterized in that: The diffuse reflectance of the projection film screen (7) is greater than 95% and the absolute value of the yellowing index is less than 0.
5.
6. The optical imaging testing device for a projector according to claim 1, characterized in that: The integrated spectrometer color brightness imager (9) has a pixel value selectable from 8 million to 80 million.