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Optical Radius Gages

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For the most demanding optical radius inspections, ORS gages feature a fully captured linear air bearing straight to 100 micro-inches (2.5 microns) over the full 40 inches (1 meter) of travel. The optical radius slide has a fine adjustment feature that incorporates a 40 pitch screw with worm gear and hand wheel that allows for precise movements below 40 micro-inch (1 micron) steps. A high-resolution glass scale provides 1 micron/meter accuracy and a high-resolution digital readout (DRO) displays the encoder position.

Optical Radius Gages

Download a product datasheet for the Air Bearing Optical Radius Gages, Model ORS1000


Measurement and inspection of radius of curvatures for optics and linear accuracy of precision manufactured parts.


Straightness of travel accuracy of 100 micro-inches over 40” of travel (2.5 micron/meter).


  • Various high-resolution optical encoders (available with millions of counts per inch)
  • high-resolution glass scale and digital readout (DRO).


  • Part-holding and alignment fixtures; optical benches
  • multiple probes and gage stands.


ORS1000: 40” (1000mm) optical radius slide