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 sensor diagonal up to 2/3″ (16.9 mm)

ModelImage circleObject circleMagnificationWorking distanceCamera mountData sheetCADPrice
BTL-11.5-2511.5 mm25 mm0.4645 mmC – MountData sheetCADSend request
BTL-11.5-3511.5 mm35 mm0.32955 mmC – MountData sheetCADSend request
BTL-11.5-4511.5 mm45 mm0.25665 mmC – MountData sheetCADSend request
BTL-11.5-6011.5 mm60 mm0.19280 mmC – MountData sheetCADSend request
BTL-11.5-7011.5 mm70 mm0.16495 mmC – MountData sheetCADSend request
BTL-11.5-8511.5 mm85 mm0.135120 mmC – MountData sheetCADSend request
BTL-11.5-10511.5 mm105 mm0.11155 mmC – MountData sheetCADSend request
BTL-11.5-12511.5 mm125 mm0.092195 mmC – MountData sheetCADSend request
BTL-11.5-15511.5 mm155 mm0.074255 mmC – MountData sheetCADSend request
BTL-11.5-18511.5 mm185 mm0.062320 mmC – MountData sheetCADSend request
BTL-11.5-21511.5 mm215 mm0.053375 mmC – MountData sheetCADSend request
BTL-11.5-24511.5 mm245 mm0.047420 mmC – MountData sheetCADSend request
BTL-11.5-27011.5 mm270 mm0.043480 mmC – MountData sheetCADSend request
BTL-11.5-31511.5 mm315 mm0.037545 mmC – MountData sheetCADSend request

BTL 18.5 – Bi-telecentric lenses for sensor diagonal up to 1.1″ (27.9 mm)

ModelImage circleObject circleMagnificationWorking distanceCamera mountData sheetCADPrice
BTL-18.5-2518.5 mm25 mm0.7445 mmC – MountData sheetCADSend request
BTL-18.5-3518.5 mm35 mm0.52955 mmC – MountData sheetCADSend request
BTL-18.5-4518.5 mm45 mm0.41165 mmC – MountData sheetCADSend request
BTL-18.5-6018.5 mm60 mm0.30880 mmC – MountData sheetCADSend request
BTL-18.5-7018.5 mm70 mm0.26495 mmC – MountData sheetCADSend request
BTL-18.5-8518.5 mm85 mm0.218120 mmC – MountData sheetCADSend request
BTL-18.5-10518.5 mm105 mm0.176155 mmC – MountData sheetCADSend request
BTL-18.5-12518.5 mm125 mm0.148195 mmC – MountData sheetCADSend request
BTL-18.5-15518.5 mm155 mm0.119255 mmC – MountData sheetCADSend request
BTL-18.5-18518.5 mm185 mm0.1320 mmC – MountData sheetCADSend request
BTL-18.5-21518.5 mm215 mm0.086375 mmC – MountData sheetCADSend request
BTL-18.5-24518.5 mm245 mm0.076420 mmC – MountData sheetCADSend request
BTL-18.5-27018.5 mm270 mm0.069480 mmC – MountData sheetCADSend request
BTL-18.5-31518.5 mm315 mm0.059545 mmC – MountData sheetCADSend request

BTL 23 – Bi-telecentric lenses for sensor diagonal up to 4/3″ (33.9 mm)

ModelImage circleObject circleMagnificationWorking distanceCamera mountData sheetCADPrice
BTL-23-2523 mm25 mm0.9245 mmM42Data sheetCADSend request
BTL-23-3523 mm35 mm0.65755 mmM42Data sheetCADSend request
BTL-23-4523 mm45 mm0.51165 mmM42Data sheetCADSend request
BTL-23-6023 mm60 mm0.38380 mmM42Data sheetCADSend request
BTL-23-7023 mm70 mm0.32995 mmM42Data sheetCADSend request
BTL-23-8523 mm85 mm0.271120 mmM42Data sheetCADSend request
BTL-23-10523 mm105 mm0.219155 mmM42Data sheetCADSend request
BTL-23-12523 mm125 mm0.184195 mmM42Data sheetCADSend request
BTL-23-15523 mm155 mm0.148255 mmM42Data sheetCADSend request
BTL-23-18523 mm185 mm0.124320 mmM42Data sheetCADSend request
BTL-23-21523 mm215 mm0.107375 mmM42Data sheetCADSend request
BTL-23-24523 mm245 mm0.094420 mmM42Data sheetCADSend request
BTL-23-27023 mm270 mm0.085480 mmM42Data sheetCADSend request
BTL-23-31523 mm315 mm0.073545 mmM42Data sheetCADSend request

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

ModelImage circleObject circleMagnificationWorking distanceCamera mountData sheetCADPrice
BTL-39.2-2539.2 mm25 mm1.56845 mmM58Data sheetCADSend request
BTL-39.2-3539.2 mm35 mm1.1255 mmM58Data sheetCADSend request
BTL-39.2-4539.2 mm45 mm0.87165 mmM58Data sheetCADSend request
BTL-39.2-6039.2 mm60 mm0.65380 mmM58Data sheetCADSend request
BTL-39.2-7039.2 mm70 mm0.5695 mmM58Data sheetCADSend request
BTL-39.2-8539.2 mm85 mm0.461120 mmM58Data sheetCADSend request
BTL-39.2-10539.2 mm105 mm0.373155 mmM58Data sheetCADSend request
BTL-39.2-12539.2 mm125 mm0.314195 mmM58Data sheetCADSend request
BTL-39.2-15539.2 mm155 mm0.253255 mmM58Data sheetCADSend request
BTL-39.2-18539.2 mm185 mm0.212320 mmM58Data sheetCADSend request
BTL-39.2-21539.2 mm215 mm0.182375 mmM58Data sheetCADSend request
BTL-39.2-24539.2 mm245 mm0.16420 mmM58Data sheetCADSend request
BTL-39.2-27039.2 mm270 mm0.145480 mmM58Data sheetCADSend request
BTL-39.2-31539.2 mm315 mm0.124545 mmM58Data sheetCADSend request

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

ModelImage circleObject circleMagnificationWorking distanceCamera mountData sheetCADPrice
BTL-44-2544 mm25 mm1.7645 mmM58Data sheetCADSend request
BTL-44-3544 mm35 mm1.25755 mmM58Data sheetCADSend request
BTL-44-4544 mm45 mm0.97865 mmM58Data sheetCADSend request
BTL-44-6044 mm60 mm0.73380 mmM58Data sheetCADSend request
BTL-44-7044 mm70 mm0.62995 mmM58Data sheetCADSend request
BTL-44-8544 mm85 mm0.518120 mmM58Data sheetCADSend request
BTL-44-10544 mm105 mm0.419155 mmM58Data sheetCADSend request
BTL-44-12544 mm125 mm0.352195 mmM58Data sheetCADSend request
BTL-44-15544 mm155 mm0.284255 mmM58Data sheetCADSend request
BTL-44-18544 mm185 mm0.238320 mmM58Data sheetCADSend request
BTL-44-21544 mm215 mm0.205375 mmM58Data sheetCADSend request
BTL-44-24544 mm245 mm0.18420 mmM58Data sheetCADSend request
BTL-44-27044 mm270 mm0.163480 mmM58Data sheetCADSend request
BTL-44-31544 mm315 mm0.14545 mmM58Data sheetCADSend request