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Targets Calculator

Targets Calculator

4-bar target

Collimator's Focal Length

Calculate bar width

Calculate the bar width (inches and mm) from a known collimator focal length and a specific spatial frequency value (cy/mrad)

Spatial Frequency
Bar Width (t)
0.002(inches) 0.05(inches)

Calculate Spatial Frequency

Calculate the spatial frequency value (cy/mrad) from a known collimator focal length and a specific bar width (inches)

Bar Width (t)
Spatial Frequency
30.05(cy/mrad)
  • Standard feature tolerance is 5 % for target features equal or larger than 0.0012 " 30 µm), and 20 % for target features smaller than 0.0012 " 30 µm ). Tighter tolerances are available upon request.
  • Please refer to collimator's datasheets for more technical information or Contact CI Systems

Pinhole target

Collimator's Focal Length

Calculate pinhole diameter

Calculate the pinhole diameter from a known collimator focal length and a specific angular size of pinhole (mrad)

Angular size of pinhole
Pinhole diameter (d)
0.002(inches) 0.05(inches)

Calculate angular size of pinhole

Calculate the angular size of a pinhole target from a known collimator focal length and a specific pinhole diameter (inches)

Pinhole diameter (d)
Angular size of pinhole
30.05 (mrad)
  • Standard feature tolerance is 5 % for target features equal or larger than 0.0012 " 30 µm), and 20 % for target features smaller than 0.0012 " 30 µm ). Tighter tolerances are available upon request.
  • Please refer to collimator's datasheets for more technical information or Contact CI Systems
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