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 Z-Plane Sensor


The NSI-OP-5904 Z-Plane Sensor is used along with the Z-Plane Laser to measure the planarity of a planar near-field scanner.  The NSI-OP-5904 sensor is mounted to a 45-degree angle bracket on the probe antenna platform. The sensor is illuminated by the rotating Z-plane laser beam. As the beam rotates, the sensor detects and processes probe Z-plane error and provides that information to the computer for analysis. The sensor has a measurement range of ±0.1-inch with 0.001-inch rms accuracy. Power on and beam detection LEDs provide visual indications of status. When combined with the NSI 2000 software, the sensor provides an automated technique to acquire an XY measurement grid of Z-error data. Using the Z-sensor and Z-laser, the grid can be easily updated to monitor scanner deformation over time. The Z-error grid may be used with NSI's on-the-fly error correction capability (requires probe Z-stage) to correct the probe position during antenna measurements.

  • Detects pulses from spinning plane laser
  • 25 µm (0.001”) accuracy
  • 10 mm (0.4”) sensor range
  • Requires Z-plane laser, DSP interface unit and software (included with NSI-OP-5908 and NSI-OP-5929 Measurement Systems)

Accuracy 0.001" (.025 mm)
Range 0.4" (10 mm)
Interface connector DB25(m)
Mounting Four (4) 0.154" diameter thru holes
Mounting angle (typical) 45 degrees
Z-Sensor mounted to probe Z-Translation Stage


  • Width - 6.38" (162 mm)
  • Depth - 1.13" (29 mm)
  • Height - 3.00" (76 mm)

Please contact the NSI Sales department to order this product.

Nearfield Systems, Incorporated
19730 Magellan Drive, Torrance, CA 90502, USA, Tel: 310.525.7000, Fax: 310.525.7100
Email: sales@nearfield.com. Visit our website: www.nearfield.com