The Gracing Incidence Interferometer from Plano Optics Private Limited is an Interferometer that has a resolution of 0.03 μm. It has an accuracy of 0.1 μm - 0.4 μm + 2% of the measured value and a repeatability of 0.03 μm. This interferometer has a sensitivity of 0.5 μm, 1 μm, 2 μm, and 4 μm per fringe and flatness of 0.06 μm. It has a dynamic range of over 100 μm and measurement time of 5 seconds. This interferometer uses the grazing incidence principle and has ground, lapped, or polished surfaces. It can be monitored using a computer and is available in a housing that measures 65 cm x 65 cm x 35 cm. This interferometer is ideal for applications such as flatness measurement of reflective or non-reflective surfaces.