In the field of industrial measurement and machine vision, whenever it comes to high-precision, high-stability lens solutions, double telecentric lenses are always the first choice, becoming the first choice of many professionals. So, what exactly makes the double telecentric lens so highly respected?

Eliminate parallax and distortion to ensure high accuracy

The special optical design of the double telecentric lens effectively eliminates parallax and aberrations, ensuring high accuracy of measurements. Traditional industrial lenses often have the problem of parallax, which leads to inaccurate measurement results. The double telecentric lens solves this problem by receiving parallel light, making the image consistent and highly accurate at all positions in the field of view.

Constant magnification when the object distance changes

Another significant feature of the double telecentric lens is that its magnification does not change with the object distance. Conventional lens magnification is usually inversely proportional to the object distance, i.e., the larger the object distance, the smaller the magnification. However, the double telecentric lens is able to maintain a constant magnification at different object distances through the rational design of its internal lens group. This feature makes the double telecentric lens particularly suitable for applications that require precise measurement of dimensions, such as semiconductor chip manufacturing and inspection of precision mechanical parts.

Large Depth of Field for Clear Imaging of Objects in Different Positions

Double telecentric lenses have a large depth of field, enabling clear imaging of objects in different positions at the same time. This feature makes the double telecentric lens excellent for measuring objects with large height differences. For example, in the semiconductor chip manufacturing process, multiple features on the surface and edge of the chip need to be detected at the same time, and the double telecentric lens ensures that these features can be clearly imaged at different heights, thus improving measurement efficiency and accuracy.

Stable Imaging, Reduced Errors

The double telecentric lens has high image stability and is not affected by the position of the object. This feature makes it possible to minimize errors caused by changes in the position of the object during the measurement process. The special optical design of the double telecentric lens allows the light to remain parallel and stable as it passes through the lens, thus ensuring consistent image quality.

Adaptation to Complex Lighting Environments

In complex lighting environments, traditional lenses are often susceptible to external light interference, resulting in a decline in image quality. But the double telecentric lens through its special optical design, can effectively avoid the interference of stray light, to ensure that the image outline is clear. This feature makes the double telecentric lens perform well in complex lighting environments such as defect detection of transparent glass bottles, and can accurately identify small defects, such as scratches, white spots and so on.

Wide range of applications

Double telecentric lenses are not only widely used in semiconductor chip manufacturing and precision machinery parts inspection, but also in the medical industry, laser systems and other fields to show its unique advantages. In the medical industry, double telecentric lenses can excellently fulfill the inspection tasks and greatly improve the accuracy of inspection; in the laser system, double telecentric lenses can avoid the problem of actual magnification deviation caused by the inaccurate position of the point of light.