Overview
Surface roughness is a critical parameter to measure and control during optical manufacture. Optical Perspective’s unique new MFT is a simple, low cost solution to surface roughness measurement.
The MFT has three unique configurations: Measurement sensor, and its large and small optics configurations.
The measurement sensor is a modified PSM, also made by Optical Perspectives Group. The sensor (pictured at right) is designed for on machine metrology, integration into custom fixturing or a multi-axis test stand.
The large optic configuration (pictured below) sets directly on an optical surface larger than 100 mm diameter. Ease of use is assured by design. Simply place the MicroFinish Topographer on the surface to be measured. Its three nylon support balls gently contact the surface. Simple tip/tilt and focus controls adjust the instrument for high contrast fringes. The next time you place the MFT on the surface it is ready to measure again.
The small optic configuration (pictured below) is upward looking with a self-aligning fixture. Simply place the optic on the fixture and test.
All units utilize phase shifting interferometry for data acquisition and 10X or 20X Mirau objectives for surface imaging.
