COOLENS DTCM111 Bi-Telecentric Machine Vision Lenses for 1.1" Sensors

The COOLENS DTCM111 series consists of 20 bi-telecentric lenses for industrial cameras with sensors up to 1.1" (18.4 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 reduces perspective errors when the object distance changes slightly. The series has specified optical distortion below 0.1% and telecentricity below 0.1°. This makes the lenses suitable for diameter and width measurements, contour inspection and precise dimensional measurements.

Field of view, magnification and working distance

The DTCM111 series offers object-side FOV diagonals from 26 to 300 mm, with optical magnifications ranging from 0.708x to 0.061x. 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. The lenses can also be used with smaller sensors, resulting in a smaller available field of view.

Optical measurement accuracy

Bi-telecentric optics minimize changes in image magnification when object height varies. However, the final measurement accuracy also depends on camera resolution, calibration, mechanical stability and image processing. Larger lenses require particularly rigid mechanical mounting to prevent deflection and vibration.

Key features

• 20 bi-telecentric C-mount lenses

• Designed for sensors up to 1.1" (18.4 mm diagonal)

• Object-side FOV diagonals from 26 to 300 mm

• Optical magnifications from 0.708x to 0.061x

• Nominal working distances from 73 to 465 mm

• Optical distortion below 0.1%

• Telecentricity below 0.1°