Jul 2000National Physical LaboratoryRequest Info
The National Physical Laboratory (NPL) in the UK says its laser interferometers offer subnanometer resolution with high accuracy rates in displacement measuring applications. The Michelson configuration is polarization-insensitive, uses a corner cube retroreflector and measures 23 x 36 x 12 mm. The interferometer in the Jamin configuration measures 120 x110 x 42 mm and uses a plane mirror as the reflecting target. Both devices provide phase quadrature outputs for reversible counting.