DIOPTIC Bi-Telecentric Lenses

Recording of two identical objects at different distances with a telecentric lens (left) and a standard lens (right)
Front view of a metal profile with a telecentric lens (left) and with a standard lens (right)
Telecentric lenses are ideally suited for image processing solutions such as the measurement of components due to their imaging properties. The special position of the entrance pupil at infinity provides telecentric lenses with properties that make them particularly suitable for measurement tasks in industrial environments. DIOPTIC’s bi-telecentric lens series is additionally telecentric on the image side and can be quickly and flexibly extended to special customer requirements due to its modular design. With the double-sided telecentric lens series, you can take advantage of all the benefits of this lens type as well as other special features:

  • Constant magnification: No matter at what distance within the field of view an object is located, the magnification is always the same. This means that the size of an object can be determined without further information about the object distance.
  • Perpendicular angle of view: The angle of view of a telecentric lens is perpendicular to the image plane over the entire field of view. Surfaces and edges perpendicular to the imaging plane are not imaged. This is of great advantage especially when measuring high components and long profiles.
  • Low distortion: DIOPTIC telecentric lenses exhibit extremely low distortion. Therefore, test objects can be measured and characterized extremely accurately without further calibration
  • Variable object distance: If the specified object distance does not fit your setup, you can change it yourself using the shim rings provided with the lens. Due to the bi-telecentric design, this does not change the magnification
  • Adaptability: If you cannot find a suitable lens for your application, there is the possibility to develop one especially for you. Due to the modular design of our lens series this can be done with little effort.
For advice, contact: Dr. Florian Hudelist | Tel.: +49 6201 65040-11

Product overview: DIOPTIC bi-telecentric lenses

BTL 11.5 – Bi-telecentric lenses for sensors up to 11.5mm diagonal

Modell Image circle Object circle Magnification Working distance Mount Price and availibility
BTL-11.5-25 11.5mm 25mm 0.46 45mm C on request
BTL-11.5-35 11.5mm 35mm 0.33 55mm C on request
BTL-11.5-45 11.5mm 45mm 0.26 65mm C on request
BTL-11.5-60 11.5mm 60mm 0.19 80mm C on request
BTL-11.5-70 11.5mm 70mm 0.16 95mm C on request
BTL-11.5-85 11.5mm 85mm 0.14 120mm C on request
BTL-11.5-105 11.5mm 105mm 0.11 155mm C on request
BTL-11.5-125 11.5mm 125mm 0.09 195mm C on request
BTL-11.5-155 11.5mm 155mm 0.074 255mm C on request
BTL-11.5-185 11.5mm 185mm 0.062 320mm C on request
BTL-11.5-215 11.5mm 215mm 0.053 375mm C on request
BTL-11.5-245 11.5mm 245mm 0.047 420mm C on request
BTL-11.5-270 11.5mm 270mm 0.043 480mm C on request
BTL-11.5-315 11.5mm 315mm 0.037 545mm C on request

BTL 18.5 – Bi-telecentric lenses for sensors up to 18.5mm diagonal

Modell Image circle Object circle Magnification Working distance Mount Price and availibility
BTL-18.5-25 18.5mm 25mm 0.74 45mm C on request
BTL-18.5-35 18.5mm 35mm 0.53 55mm C on request
BTL-18.5-45 18.5mm 45mm 0.41 65mm C on request
BTL-18.5-60 18.5mm 60mm 0.31 80mm C on request
BTL-18.5-70 18.5mm 70mm 0.26 95mm C on request
BTL-18.5-85 18.5mm 85mm 0.22 120mm C on request
BTL-18.5-105 18.5mm 105mm 0.18 155mm C on request
BTL-18.5-125 18.5mm 125mm 0.15 195mm C on request
BTL-18.5-155 18.5mm 155mm 0.12 255mm C on request
BTL-18.5-185 18.5mm 185mm 0.10 320mm C on request
BTL-18.5-215 18.5mm 215mm 0.09 375mm C on request
BTL-18.5-245 18.5mm 245mm 0.08 420mm C on request
BTL-18.5-270 18.5mm 270mm 0.07 480mm C on request
BTL-18.5-315 18.5mm 315mm 0.06 545mm C on request

BTL 23 – Bi-telecentric lenses for sensors up to 23mm diagonal

Modell Image circle Object circle Magnification Working distance Mount Price and availibility
BTL-23-25 23mm 25mm 0.92 45mm F on request
BTL-23-35 23mm 35mm 0.66 55mm F on request
BTL-23-45 23mm 45mm 0.51 65mm F on request
BTL-23-60 23mm 60mm 0.38 80mm F on request
BTL-23-70 23mm 70mm 0.33 95mm F on request
BTL-23-85 23mm 85mm 0.27 120mm F on request
BTL-23-105 23mm 105mm 0.22 155mm F on request
BTL-23-125 23mm 125mm 0.18 195mm F on request
BTL-23-155 23mm 155mm 0.15 255mm F on request
BTL-23-185 23mm 185mm 0.12 320mm F on request
BTL-23-215 23mm 215mm 0.11 375mm F on request
BTL-23-245 23mm 245mm 0.094 420mm F on request
BTL-23-270 23mm 270mm 0.085 480mm F on request
BTL-23-315 23mm 315mm 0.073 545mm F on request

BTL 39.2 – Bi-telecentric lenses for sensors up to 39.2mm diagonal

Modell Image circle Object circle Magnification Working distance Mount Price and availibility
BTL-39.2-25 39.2mm 25mm 1.57 45mm F on request
BTL-39.2-35 39.2mm 35mm 1.12 55mm F on request
BTL-39.2-45 39.2mm 45mm 0.87 65mm F on request
BTL-39.2-60 39.2mm 60mm 0.65 80mm F on request
BTL-39.2-70 39.2mm 70mm 0.56 95mm F on request
BTL-39.2-85 39.2mm 85mm 0.46 120mm F on request
BTL-39.2-105 39.2mm 105mm 0.37 155mm F on request
BTL-39.2-125 39.2mm 125mm 0.31 195mm F on request
BTL-39.2-155 39.2mm 155mm 0.25 255mm F on request
BTL-39.2-185 39.2mm 185mm 0.21 320mm F on request
BTL-39.2-215 39.2mm 215mm 0.18 375mm F on request
BTL-39.2-245 39.2mm 245mm 0.16 420mm F on request
BTL-39.2-270 39.2mm 270mm 0.15 480mm F on request
BTL-39.2-315 39.2mm 315mm 0.12 545mm F on request

BTL 44 – Bi-telecentric lenses for sensors up to 44mm diagonal

Modell Image circle Object circle Magnification Working distance Mount Price and availibility
BTL-44-25 44mm 25mm 1.76 45mm M58 on request
BTL-44-35 44mm 35mm 1.26 55mm M58 on request
BTL-44-45 44mm 45mm 0.98 65mm M58 on request
BTL-44-60 44mm 60mm 0.73 80mm M58 on request
BTL-44-70 44mm 70mm 0.63 95mm M58 on request
BTL-44-85 44mm 85mm 0.52 120mm M58 on request
BTL-44-105 44mm 105mm 0.42 155mm M58 on request
BTL-44-125 44mm 125mm 0.35 195mm M58 on request
BTL-44-155 44mm 155mm 0.28 255mm M58 on request
BTL-44-185 44mm 185mm 0.24 320mm M58 on request
BTL-44-215 44mm 215mm 0.21 375mm M58 on request
BTL-44-245 44mm 245mm 0.18 420mm M58 on request
BTL-44-270 44mm 270mm 0.16 480mm M58 on request
BTL-44-315 44mm 315mm 0.14 545mm M58 on request