New challenges and approaches to interferometric MEMS and MOEMS testing

The paper gives the overview of various concepts of optical measurements of microelements including MEMS, MOEMS and electronic packages. In particular it describes waveguide microinterferometer which enables an alternative usage of conventional interferometry (CI), grating interferometry (GI) and digital holographic interferometry for shape in-plane and out-of-plane displacement measurements of static and dynamic microobjects. Additionally interferometric thermography (IT) is presented for determination of 3D refractive index distribution in fibre optics and waveguide microelements. To prove the applicability of these experimental tools, the wide selection of measurement examples is given.