COOLENS DTCM118 Bi-Telecentric Machine Vision Lenses for 1/1.8" Sensors
The COOLENS DTCM118 series consists of 20 bi-telecentric lenses for industrial cameras with sensors up to 1/1.8" (9.0 mm diagonal). These lenses are designed for precise dimensional inspection applications requiring constant magnification, low optical distortion and reliable edge detection.
The bi-telecentric optical design maintains nearly constant magnification when the object distance changes slightly. Both optical distortion and telecentricity are specified at less than 0.1%. This makes the series suitable for diameter and width measurements, contour inspection and precise component positioning.
Field of view, magnification and working distance
The DTCM118 series offers object-side FOV diagonals from 26 to 300 mm, with optical magnifications ranging from 0.346x to 0.030x. Nominal working distances range from 73 to 465 mm. All models feature a standard C-mount camera interface.
Lens selection depends on the required field of view, camera sensor dimensions and available installation space. Using a smaller sensor also reduces the available field of view.
Optical measurement accuracy
Bi-telecentric optics help reduce perspective errors when components have small height variations. However, the final measurement accuracy also depends on pixel resolution, calibration, mechanical stability and image processing. The specified depth of field should therefore not be interpreted as the range over which identical measurement accuracy is guaranteed.
Key features
20 bi-telecentric C-mount lenses
Designed for sensors up to 1/1.8" (9.0 mm diagonal)
Object-side FOV diagonals from 26 to 300 mm
Optical magnifications from 0.346x to 0.030x
Nominal working distances from 73 to 465 mm
Optical distortion below 0.1%
Telecentricity below 0.1°
