With standard lenses an object appears to be smaller or bigger when it is closer or farther away from the lens. Unlike common optics, telecentric lenses only accept incoming ray bundles that are parallel to the optical axis; therefore the object size remains unchanged. This is essential when you must measure objects that cannot be precisely positioned (e.g. on a conveyor belt).
Moreover, telecentric lenses eliminate any perspective error and are therefore perfect when thick objects must be measured.
Telecentric lenses also outperform standard lenses when it comes to distortion: An image is distorted when straight lines in the object space appear as curved lines in the image space. Distortion is measured as a percent deviation. Opto Engineering telecentric lenses feature incredibly low distortion, typically under 0.05 % and deliver extremely accurate geometrical information.
The Opto Engineering TC 12K telecentric lenses are designed to fit very large format line scan cameras. The 62.5mm image circle diameter combined with high resolution capabilities makes these lenses the ideal choice for 12KP and 16KP pixel line cameras.
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|Model||Camera mount (optics)||Max. sensor size (mm)||Manufacturer||Magnification (max)||Working distance (mm)|
|OE TC 12K 064-M72||M72 x 0.75||62.4||Opto Engineering||0.96||162.8|
|OE TC 12K 080-M72||M72 x 0.75||62.4||Opto Engineering||0.698||157.4|
|OE TC 12K 120-M72||M72 x 0.75||62.4||Opto Engineering||0.529||254.0|
|OE TC 12K 144-M72||M72 x 0.75||62.4||Opto Engineering||0.439||237.9|
|OE TC 12K 192-M72||M72 x 0.75||62.4||Opto Engineering||0.320||265.5|
|OE TC 12K 240-M72||M72 x 0.75||62.4||Opto Engineering||0.26||492.8|