LANO TECHNOLOGY CO., LTD.
LANO TECHNOLOGY CO., LTD.
  • The machine vision telecentric lens adopts a far-field design from the object side to ensure measurement accuracy

  • Shorter working distance brings convenience for installation in  narrow spaces

How Does A Telecentric Lens Work?

A telecentric camera lens maintains constant magnification regardless of the object's distance or position along the optical axis. It achieves this by having parallel chief rays (rays that pass through the center of the aperture stop) which ensures the entrance pupil is effectively located at infinity. There are two main types: object-space telecentric, with parallel rays on the object side, and image-space telecentric, with parallel rays on the image side. Double telecentric lenses combine both features.


These lenses eliminate parallax errors and provide consistent image magnification, making them ideal for precision measurement, machine vision, and microscopy. They offer improved depth of field and uniform image brightness. Telecentric lenses are constructed using complex optical designs, often including aspheric elements, to correct aberrations and maintain image quality across the field of view.


FAQs of Telecentric Lens

  • What are the benefits of using a telecentric lens?

    Telecentric lenses offer several benefits, including consistent magnification regardless of object distance, eliminating parallax errors and ensuring precise measurements. They provide a uniform image brightness across the field of view and improve depth of field, maintaining sharpness over a greater range of distances. These lenses are ideal for high-precision applications such as machine vision, metrology, and microscopy, where accurate, distortion-free imaging is critical. Their design ensures reliable and repeatable measurements, enhancing overall imaging accuracy and quality.

  • Primary applications of telecentric lenses

    Telecentric lenses are primarily used in applications requiring high precision and consistent imaging. These include machine vision systems for automated inspection and quality control, metrology for accurate dimensional measurements in manufacturing, and microscopy for detailed and distortion-free imaging in biological and material sciences. They are also crucial in semiconductor inspection, ensuring consistent magnification and eliminating parallax errors, making them ideal for industries where precise, repeatable measurements and uniform image brightness are essential.

  • What are the types of telecentric lenses?

    There are mainly two types of telecentric lenses: object-space telecentric lenses and image-space telecentric lenses. Object-space telecentric lenses have parallel chief rays on the object side, while image-space telecentric lenses have parallel chief rays on the image side. Additionally, there are double telecentric lenses that combine both features.