In modern electronic manufacturing industry, inductor as an important electronic component, its quality and performance have a vital impact on the stability and reliability of the whole electronic product. In the production and testing process of inductors, height difference is a key parameter that needs to be strictly controlled. In order to realize the accurate detection of height difference of inductors, double telecentric lens, as a special optical component, shows its unique advantages and value.

Inductors often have a certain difference in height due to various factors during the manufacturing process. This height difference will not only affect the performance of the inductor, but also may cause trouble to the layout and assembly of the whole circuit board. Therefore, before the inductor leaves the factory, the height difference detection is an essential part.

Traditional inspection methods often have some problems, such as perspective errors, resulting in inaccurate inspection results. The double telecentric lens can effectively solve this problem. Double telecentric lens is a special optical design, its unique optical properties can eliminate the “near big far small” perspective error. This means that no matter how close or far the inductor is from the lens, the height difference can be accurately measured, thus ensuring the accuracy and reliability of the test results.

In practice, the double telecentric lens is usually combined with high-precision measuring devices, such as laser range finders and image sensors. These devices are able to capture an image of the surface of the inductor and accurately calculate the height difference of the inductor through the correction effect of the double telecentric lens. At the same time, since the dual telecentric lens has a larger depth of field and smaller distortion, it can be applied to the detection of inductors of different sizes and shapes, which improves the versatility and flexibility of the detection.

In addition, the double telecentric lens also has a longer working distance and a larger field of view, which makes it able to cover more detection points in inductor detection, thus improving the detection efficiency. At the same time, it is also very convenient in practical applications due to its compact structure and easy installation and commissioning.

The double telecentric lens has unique advantages and value in inductor height difference detection. It can eliminate perspective errors and improve the accuracy and reliability of the detection results; at the same time, it also has the advantages of larger depth of field, smaller aberration, longer working distance and larger field of view, which is suitable for the detection of inductors of different sizes and shapes.