Computar TEC55 – 55mm Telecentric Lens (C Mount)

Computar TEC55 – 55mm Telecentric Lens (C Mount)

55mm F/2.8 Telecentric Lens with a minimum working distance of 140 millimeters. Locking screws are provided for focus and aperture rings. 2X and 0.75X adapter are available.


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Product Description

55mm F/2.8 Telecentric Lens

The Computar TEC-55 is a 55mm telecentric lens designed for cameras with a 2/3 Format sensor array. It has a minimum working distance of 0.14 meters which produces an object size of 17x13mm. Locking screws secure both the focus ring and aperature.

Computar TEC-55 Telecentric Lens Dimensions

About Telecentric Lenses

In machine vision systems requiring accurate measurements an orthonormal view of the object (i.e. with no object sides imaging) is needed so that correct linear measurements may be performed. Furthermore, many mechanical parts cannot be precisely positioned (i.e. because of vibrations) or a measurement must be performed at different depths or, even worse, the object thickness (and therefore the object surface position) may vary; nevertheless, software engineers do need a perfect correlation between imaged and real dimensions.

On the left is an image of an internal spline on a cylindrical object taken with a telecentric lens (top) and the same object viewed by an ordinary lens (bottom). On the right an image of two identical machine screws set 100 mm apart, taken with a telecentric lens (top) and with an ordinary lens (bottom).

Model No. TEC-55
Focal Length 55mm
Aperture Range F2.8-F32C
Max Image Format 8.8mm x 6.6mm x 11mm
Working Distance 0.14m - Infinity
Iris Manual
Focus Manual
Mount C-Mount
Filter Size M43.0 P-0.75mm
Back Focal Length 29.8mm
Dimenions 53.0mm (D) x 92.9mm (L)
Weight 320.0g
Angle of View
2/3 Type 9.2 x 6.9
1/1.8 Type NA
1/2 Type NA
Computar TEC-55 Datasheet PDF 93 kb Download File
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