Background and objectives of the test

With the increasing popularity of folding screen devices, precise control of the folding screen angle is crucial to product performance and user experience. Tiny angle deviation may lead to problems such as uneven folding of the screen and abnormal display. The unique optical characteristics of telecentric lenses, combined with the supporting equipment, can realize high-precision and fast inspection of the folding screen opening and closing angles to ensure that the product quality meets the standards.

Folding Screen Angle Detection Program

Telecentric Lens: The telecentric lens with extremely small error in telecentricity is selected to ensure that when observing objects from different distances, the light within the field of view of the object will be nearly parallel incidence, thus eliminating the angular measurement error caused by perspective. Its high resolution can clearly capture the edge details of the folded screen, low distortion characteristics to ensure the accuracy of the measurement, large depth of field to adapt to the folded screen in the inspection process of the tiny position fluctuations, with good light uniformity, to provide a solid foundation for accurate detection.

High Definition Industrial Camera: Equipped with a high definition industrial camera with no less than 10 megapixels, tightly connected to the telecentric lens, the camera is equipped with a high speed continuous shooting function, with a frame rate of up to [X] frames/second or more, in order to meet the needs of rapid inspection of the production line. At the same time, its high sensitivity sensor can accurately capture subtle light changes under the illumination of the coaxial telecentric light source, and quickly and accurately convert the image information of the folding screen into digital signals for transmission to the subsequent processing system.

Parallel telecentric light source: Adopting parallel telecentric light source, the light shines along the optical axis of the lens on the back of the folded screen, so that the light evenly covers the inspection area, avoiding shadow interference and enhancing image contrast. The brightness of the light source can be adjusted, according to the material and surface characteristics of the folded screen, the lighting intensity can be flexibly adjusted to the optimal lighting intensity, highlighting the edge contour of the folded screen and facilitating clear imaging by telecentric lens and industrial camera.

Mechanical installation and commissioning: Fix the telecentric lens, high-definition industrial camera and coaxial telecentric light source on the top of the inspection platform through precise mechanical structure to ensure that the optical axes of the three are strictly coaxial. Adjust the distance between the lens and the folding screen to a suitable working position, so that the folding screen complete imaging in the camera field of view, the use of high-precision calibration tooling for the entire optical inspection system calibration, to ensure the accuracy of the measurement reference.

Telecentric lens in high precision, object-side telecentricity error is small, high-resolution imaging, accurate measurement of the folding screen tiny angular changes; stability, low distortion, large depth of field, to adapt to positional fluctuations, to ensure that the test results are reliable. Imaging quality, uniform illumination, anti-environmental light interference, easy to analyze accurately. Efficient detection, high-speed continuous shooting, automated processing, in line with the rhythm of the production line. There is also powerful data management, which can store, analyze and trace the quality, guaranteeing the quality and competitiveness of folding screen products in an all-round way.