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Machine Vision Telecentric Lens

A Telecentric lens is a kind of lens that the chief rays are parallel to the optical axis. There are three kinds of telecentric lens, that is the object-space telecentric lens, image-space telecentric lens, and the bi-telecentric lens. Telecentric lens is always the core business of Canrill Lens. After continuous research and development for 11 years, Canrill has successfully developed 1700+ kinds of lenses, and the number is still increasing, to meet the diverse and growing applications at the best telecentric lens price.


Difference Between Object Space Telecentric Lens And Bi Telecentric Lens

Telecentric lenses have two types of telecentricity: object space and image space telecentricity (referring to the entrance and exit pupil positions, respectively). Therefore, telecentric lenses are divided into: object space telecentric lens, image space telecentric lens, and bi telecentric lens.


Object Space Telecentric Lens

In general, a machine vision telecentric lens refers to an object space telecentric lens. If the entrance pupil of the lens is located at an infinite position in the image side (all objects behind the objective lens), it can be called an object space telecentric lens. The chief ray originated from optical axis is parallel with optical axis in object side ( or to say have very small angle θ which is called telecentricity in telecentric lens specs), while in image side is not parallel.


Object Space Telecentric Lens

object space telecentric lens with entrance pupil projected to infinity on the image side


In the optical design, object space telecentricity is achieved by placing the system's iris diaphragm at the intersection of the front-end groups. Since the entrance pupil is at infinity, the field of view is constant and has no field angle. Since the chief ray (which defines the system's field of view) passes through the optical axis at the aperture stop, when the pupil is at infinity, the ray is parallel to the optical axis and the field of view is zero. By contrast, any entrance pupil within a finite distance of the lens results in a non-parallel fiber.


telecentric objective

An object space telecentric lens in which the chief ray is completely parallel to the optical axis in the object space. Note that the field of view does not change no matter where the object plane is, because the chief ray that defines the field of view is perfectly parallel to the optical axis.


object space telecentric lenses


The entrance pupil is located where the object-side principal ray passes through the optical axis.



Bi Telecentric Lens

Although object space telecentric lenses can provide much higher measurement accuracy than conventional lenses, bi telecentric lenses can also achieve higher accuracy if the lens is object and image space telecentric. The principle of image space and object space telecentricity also applies in bi telecentric lenses. In a bi-telecentric lens, the entrance and exit pupils project to their respective infinity. The chief ray originated from optical axis is parallel with optical axis in both object side and image side ( or to say have very small angle θ which is called telecentricity in telecentric lens specs).


Bi Telecentric Lens

Bi-telecentric lens with the entrance and exit pupils projected to infinity in the image and object spaces respectively



Bi-telecentric lenses are the most accurate type of telecentric lenses because their field of view is completely unaffected by changes caused by changes in object position or sensor position, nor does it operate any cos4θ attenuation. The diagram below shows the comparison of three different lenses: fixed focal length lens,  object space telecentric lens, and double-telecentric lens. The X-axis represents the change in working distance (mm) from the nominal value, and the Y-axis represents the dimensional error percentage from the actual value.

double telecentric lens

As you can see, the bi -telecentric lens is the most accurate lens in the group, with a working distance offset of 4mm and an error of less than 0.2% during this period. Bi-telecentric lenses should be used in applications that require the highest accuracy and precision.



Non Telecentric Lens

The chief ray originated from optical axis has a angle θ with optical axis. For objects at different WD from the lens, the lens will have either smaller or larger mag.


non telecentric lens effect

non telecentric lens effect

Types Of Telecentric Lens For Sale

  • 16k Line Scan (82mm) Telecentric Lens 16k Line Scan (82mm) Telecentric Lens
    • Specially designed for large image circle up to 82mm in length

    • Suitable for line scan cameras such as 16K x 5μm,16K x 3.5μm,12K x 5μm, 8K x 7μm, etc, and area scan camera such as 155 mega pixels, 151 mega pixels

    • Long working distance from 120mm to 700mm

  • 12k Line Scan (62mm) Telecentric Lens 12k Line Scan (62mm) Telecentric Lens
    • 151Mega Pixel Super High-Resolution Lens

    • Suitable for Area Scan Camera 151 Mega Pixel-3.76μm, 120 MegaPixel-2.2μm and Line Scan Camera 16Kx3.5μm,12Kx5μm, 8Kx7μm

    • 17 standard models available, various magnifications from 1.755X to 0.165X

  • 8k Line Scan (57.4mm) Telecentric Lens 8k Line Scan (57.4mm) Telecentric Lens
    • Suitable for large format Area Scan Camera Line Scan Camera 16Kx3.5μm, 8Kx7μm, 8Kx5μm

    • 17 standard models available, various magnifications from 1.618X to 0.152X

    • M72 Mount, support customized mount

  • Full Frame Telecentric Lens Full Frame Telecentric Lens
    • High mag from 1.5X to 4X, object telecentric design, coaxial type for option, high resolution with good consistency, suitable for high precision semiconductor & display board inspection

    • Low mag from 0.114X to 1.213X, bi-telecentric design, design for large aperature

  • 38mm Sensor Telecentric Lens 38mm Sensor Telecentric Lens
    • Sensors with a diameter of 38mm can fully utilize this series to produce high-resolution images

    • With the low magnification bi-telecentric lens, can achieve adjustment from 1.0703X to 0.101X

    • Models of mag below to 0.3X can adjust DOF

    • F mount

  • 35mm Sensor Telecentric Lens 35mm Sensor Telecentric Lens
    • Suitable for sensor size of 35mm or below

    • Low magnification bi-telecentric lens series, from 0.988X to 0.0929X

    • High resolution from 5um to 53.3um

    • F mount

  • 2' (32mm) Sensor Telecentric Lens 2' (32mm) Sensor Telecentric Lens
    • Suitable for middle-sized line scan and large area scan sensor, such as 4Kx7μm, 2Kx10μm

    • Low magnification bi-telecentric lens series, from 0.896X to 0.084X

    • F mount

  • 7/4' (28mm) Sensor Telecentric Lens 7/4' (28mm) Sensor Telecentric Lens
    • Suitable for middle-sized line scan and large area scan sensor, such as 4Kx7μm, 2Kx10μm

    • Low magnification bi-telecentric lens series, from 0.793X to 0.0746X

    • Similar to 2' (32mm) Sensor Telecentric Lense

    • High resolution from 5.8um to 62um

  • 4/3' (23mm) Sensor Telecentric Lens 4/3' (23mm) Sensor Telecentric Lens
    • The series of sensor diameter of 23mm is designed to suit the larger 1.1' sensor

    • Support 1.1' and 4/3' sensor as well

    • Bi-telecentric design

    • 0.634X-0.0596X Magnification,total 17 models

    • C Mount

  • 1.1' (18mm) Sensor Telecentric Lens 1.1' (18mm) Sensor Telecentric Lens
    • Optimized bi-telecentric lens for 1.1' 3.45um cameras

    • High mag from 1X to 4X, bi-telecentric design, working distance from 65mm to 178mm. Built-in coaxial illumination is available. 

    • Low mag from 0.504X to 0.0475X,  large aperature for high brightness, widely applied in instant measurement


  • 1' (16.2mm) Sensor Telecentric Lens 1' (16.2mm) Sensor Telecentric Lens
    • Support max 18mm chip Bi telecentric lens for 1' sensor

    • Low mag from 0.504X to 0.0475X, supporting working distance from 65mm to 700mm, widely applied in instant measurement

  • Low Mag 2/3' Sensor Telecentric Lens Low Mag 2/3' Sensor Telecentric Lens
    • Wide magnification ranges from 0.0282X to 0.5X

    • Bi-telecentric design and object telecentric design

    • Compact design, short OI and high NA

    • Reduce hot spot for the coaxial type

  • High Mag 2/3' Sensor Telecentric Lens WD 65mm High Mag 2/3' Sensor Telecentric Lens WD 65mm
    • Wide magnification ranges from 0.5X to 6X

    • Bi-telecentric design and object telecentric design

    • 16 standard models of working distance 65MM

    • C mount

  • High Mag 2/3' Sensor Telecentric Lens WD 110mm High Mag 2/3' Sensor Telecentric Lens WD 110mm
    • Wide magnification ranges from 0.5X to 6X

    • Bi-telecentric design and object telecentric design

    • 16 standard models of working distance 110MM

    • C mount

  • Low Mag 1/2' Sensor Telecentric Lens Low Mag 1/2' Sensor Telecentric Lens
    • Magnification ranges from 0.0205X to 0.218 X

    • Bi-telecentric design and object telecentric design

    • Suitable for various applications, alignment, inspection, measurement, etc.

    • C mount

  • High Mag 1/2' Sensor Telecentric Lens WD 65mm High Mag 1/2' Sensor Telecentric Lens WD 65mm
    • Wide magnification ranges from 0.3X to 8X

    • Bi-telecentric design and object telecentric design

    • 21 standard models of working distance 65MM

    • 2 standard models of working distance of 40MM

  • High Mag 1/2' Sensor Telecentric Lens WD 110mm High Mag 1/2' Sensor Telecentric Lens WD 110mm
    • Wide magnification ranges from 0.3X to 6X

    • Bi-telecentric design and object telecentric design

    • 20 standard models of working distance 110MM

  • High Mag 1/2' Sensor Telecentric Long Working Distance Lens High Mag 1/2' Sensor Telecentric Long Working Distance Lens
    • Wide magnification range from 0.5X to 2X

    • Bi-telecentric design and object telecentric design

    • Support long telecentric lens working distance up to 300MM

Buying Guide For Canrill Machine Vision Telecentric Lens

Canrill has mainly two types of telecentric lens for sale: bi telecentric lens and object space telecentric lens. For your selection more quicker, we sorted out different types of telecentric lens. If you have any questions on buying telecentric lens, welcome to inquiry us. We are gladly to offer answers,



Bi Telecentric Lens

F mount bi telecentric lens for 38mm Sensors

F mount bi telecentric lens for 35mm Sensors

F mount bi telecentric lens for for middle-sized line scan and large area scan sensors

F mount bi-telecentric lens for middle-sized line scan and large area scan sensors

bi telecentric lens for larger 23mm 1.1' sensors

C mount bi telecentric lens for 1.1' 3.45um cameras

C mount Bi-telecentric lens for 1' sensor



Object Space Telecentric Lens

High mag & low mag full frame object telecentric telecentric lens



Bi-telecentric Design Object Space Telecentric Lens

Compact design telecentric lens for low mag 2/3' sensors

Compact telecentric lens for high mag 2/3' sensors

Compact telecentric lens for high mag 2/3' sensors of working distance 110MM

Telecentric lens for low mag 1/2' sensors suitable for various applications, alignment, inspection, and measurement

Telecentric lens for high mag 1/2' sensors of working distance 65MM

Telecentric lens for high mag 1/2' sensors of working distance 100MM

Telecentric lens for high mag 1/2' sensors of long working distance up to 300MM



Telecentric Lens Of Different Types of Mounts

M95 Mount telecentric lens for large image circle

M72 Mount 151mega pixel Super high-resolution telecentric lens

M72 Mount for large format area scan camera



Advantages Of Telecentric Imaging Lens System

  • High telecentricity and little-to-no distortion for accurate measurements.
    High telecentricity and little-to-no distortion for accurate measurements.
  • Good consistency for better telecentric imaging system.
    Good consistency for better telecentric imaging system.
  • Extensive range of machine vision telecentric lens covering sensor size from 4.8mm to 82mm and supporting object FOV from 0.7mm to 390mm.
    Extensive range of machine vision telecentric lens covering sensor size from 4.8mm to 82mm and supporting object FOV from 0.7mm to 390mm.
  • Considerable inventory offers the quickest leading time in industry.
    Considerable inventory offers the quickest leading time in industry.
  • Quick customization service, break the customization record by producing a new telecentric lens machine vision within 12 days from design to finished product.
    Quick customization service, break the customization record by producing a new telecentric lens machine vision within 12 days from design to finished product.
  • World-famous brands endorsement, like Apple, Samsung, Huawei, Han's Laser, Foxconn, etc.
    World-famous brands endorsement, like Apple, Samsung, Huawei, Han's Laser, Foxconn, etc.

Telecentric Lens FAQs

Telecentric Imaging System Application

  • Guidance

  • Inspection

  • Gauging

  • Identification


Visit here for more supports or any inquires about machine vision system.

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