In the field of industrial inspection, for the dimensional measurement of precision parts, we often use machine vision technology. And in the machine vision system, telecentric optical lens is an optical component that is often employed.

Telecentric lenses are widely used in some dimensional measurement equipment such as mobile phone parts, hardware measurement solutions or flash testers. There are several main reasons why we use telecentric lenses in dimensional measurement programmes:

1. Eliminate perspective error: Traditional industrial lenses produce perspective error when shooting objects due to the principle of light refraction. The telecentric lens eliminates perspective error by adopting a special optical path design, so that the captured image will not be aberrated due to changes in the object distance, thus improving the precision of size measurement.

2. Large depth of field: telecentric lenses have a large depth of field range, which can achieve clear imaging in a wide range. In size measurement, the large depth of field can ensure that when shooting the same image, the entire object to be measured can be clearly presented, reducing the measurement error.

3. High resolution: telecentric lenses are usually made of high-quality optical materials and precise manufacturing processes, which can achieve high-resolution shooting results. High resolution can capture the detailed characteristics of the measured object, improve the accuracy and reliability of dimensional measurement.

4. High stability: telecentric lenses have high mechanical and optical stability, which can reduce image jitter and distortion and ensure the stability of the measurement results.

Size measurement project, the use of telecentric lenses can greatly improve the accuracy, efficiency and reliability of size measurement, reducing the degree of error and tediousness of manual measurement. Therefore, telecentric lenses have been widely used and promoted in the field of industrial inspection.