Why Are Telecentric Lenses Dominating High-Precision Measurement?

From the manufacturing of precision electronic components to the inspection of aerospace parts, telecentric lenses, with their outstanding performance, have become a "standard" feature in many high-precision measuring instruments. So, what exactly makes telecentric lenses dominate this field?

Unique Optical Design Lays the Foundation for Precision

The core reason telecentric lenses can achieve high-precision measurements is their unique optical design. Unlike conventional lenses, telecentric lenses use a special optical path structure that makes the principal rays parallel to the optical axis. This design brings many advantages, the most notable being the elimination of parallax. In traditional lenses, changes in object distance can lead to variations in image size and position, resulting in measurement errors. However, the design of parallel principal rays in telecentric lenses ensures that the image size and position remain almost unchanged, regardless of where the object is within the measurement range, providing a solid foundation for high-precision measurement.

For example, in the manufacturing process of smartphone chips, the width and spacing of the circuit lines on the chip are typically at the micron or even nanometer level. When measuring with a telecentric lens, these tiny structures' dimensions and positional information can be accurately captured. Even if the chip slightly shifts on the measuring table, it doesn't affect the accuracy of the measurement results.

Minimal Distortion Ensures Measurement Accuracy

Another key feature that makes telecentric lenses dominate the high-precision measurement field is their minimal distortion. In high-precision measurements, even extremely small image distortions can lead to significant deviations in the measurement results. Telecentric lenses minimize image distortion through the optimization of optical lens materials and curvature, combined with precise manufacturing processes. Generally speaking, the distortion rate of telecentric lenses can be controlled within 0.1% or even lower.

For example, in the precise measurement of automotive components, the dimensional accuracy of critical parts such as engine blocks and crankshafts directly affects the performance and reliability of the vehicle. Using telecentric lenses to measure these components ensures the accuracy of the measurement results, allowing for timely detection of dimensional deviations and avoiding quality issues caused by unqualified parts.

High Resolution Provides Clear Details

In high-precision measurements, clear image details are crucial. Telecentric lenses possess the characteristic of high resolution, capable of capturing minute features on the object's surface. This allows telecentric lenses to provide rich detail information when measuring small objects or fine structures, resulting in more precise measurements.

For instance, in the jewelry appraisal industry, it is necessary to accurately measure and evaluate the cutting surfaces and textures of gemstones. The high resolution of telecentric lenses can clearly present every detail of the gemstone, helping appraisers accurately judge the quality and value of the gemstone.

Extensive Application Scenarios Validate Strength

The exceptional performance of telecentric lenses has been widely applied and validated in numerous fields. In the electronics manufacturing industry, they are used to inspect whether the electronic components on circuit boards are well-soldered and whether there are defects in chip pins. In the mechanical manufacturing industry, they are used to measure the dimensional accuracy and shape errors of mechanical parts. In the medical field, they are used for high-precision measurement and analysis of biological samples and medical instruments.

With their unique optical design to eliminate parallax, minimal distortion, high resolution, and extensive application in electronics, mechanical, medical, and other fields, telecentric lenses have become the preferred choice in high-precision measurement fields. As technology advances and precision requirements increase, their role will become even more important, and Canrill Optics can provide relevant solutions for customers.