The LMS200 from Pratt & Whitney Measurement Systems is a He-Ne Laser Interferometer that operates at a wavelength of 632.8 nm. It has a measurement range of up to 200 mm and direct reading range of 200 mm. This interferometer has an uncertainty of 0.05 + 0.5L µm and repeatability of 0.04 µm. It has a Tungsten Carbide Flatt (1/10 wave) measuring probe with a Ø 0.25" diamond tip. The probe is motorized & remote-controlled to improve system stability and eliminate operator influence. It can measure specimens of up to 293 mm x 203 mm in size and has a probe contact force of 14 grams. This interferometer has two-step calibration, an advanced time-saving feature that allows calibration using two lab-grade, traceable gage blocks and takes only 30 seconds from start to finish.
The LMS200 can operate in direct reading or comparator modes and has a programmable automatic cycling feature that supports a user-defined constant throughput rate. This interferometer stores the summation of all measurements on command and can display stats indicating the computed mean value & one standard deviation. It requires an AC supply voltage of 110/120 V - 220/240 V and consumes 1 A - 2 A of current. This interferometer is available in a package that measures 56 cm x 41 cm x 79 cm and is ideal for the measurement of balls/spheres, magnetic tape/disk substrates, optical components, poly films, gage blocks/slip gauges, coating thickness standards, plug & pin gauges, thread wires, film thickness, gauge block stacks, mesh thickness, textiles, and precision parts.