Nanooptics and photonics
Portable device for digital holographic interferometry
H.A. Petrovska1, L.V. Bartkiv1, V.M. Fitio1
1 Department of Fotonics, Lviv Polytechnic National University, C. Bandera str. 12, Lviv-71013, Ukraine. 
E-mail: halyna.a.petrovska@lpnu.ua, liubomyr.v.bartkiv@lpnu.ua, v.m.fitio@gmail.com 

A portable device for the realization of the digital holographic interferometry method has been developed. The dimensions of the device are quite small, thus it can be used for research in unsuitable conditions and it is easy to transport. A small-sized semiconductor laser with enough power and suitable coherence is used in the interferometer scheme. Fig. 1 shows the optical scheme of the developed device. 

Fig.1. Optical scheme of portable interferometer: 1 is semiconductor laser, 2 is filtering laser beam device, 3 is light-splitting cube, 4 is mirror that can rotate around an axis perpendicular to the figure plane, 5 is studied object, 6 is diaphragm, which limits the spectral spatial frequencies of the reflected light from the object, L1, L2, L3 are condenser lenses with focal lengths F1, L4 is condenser lens with focal length F2.

The software for realization of digital holographic interferometry method has been developed. Conducted experimental tests have shown effectiveness of described device.