Telecentric Lens for High Precision Detection

A telecentric lens is a special optical lens that is designed to correct the parallax of ordinary industrial lens.

It can only collect collimated light ray bundles, thus eliminating perspective

errors. Commonly, there are two kinds of telecentric lens. One is objective-space telecentric

and another one is image-space telecentric. With its unique parallel optical path design,

telecentric lens is usually used in machine vision applications, such as QR code scanning

and product defect detection. 

Challenge

Industrial lens is a very crucial imaging component of machine vision system. At the early stage

of 21st century, with the widespread application of machine vision system in precision

measurement, it set a higher standard for performance of industrial lens. Therefore,

telecentric lens came out to remedy the deficiency. For ordinary lens, the closer the target

object is, the larger the image will be. So it may cause different magnifications, high distortion rates,

low resolutions and blurred edges. While the telecentric lens can effectively solve the above problems

and provide superior image quality, less distortion, more symmetry for image and higher precision

for measurement.

Benefits

● Large depth of field, high definition

● Double telecentric design

● A perfect solution for high-precision measurement and inspection