Recording digital holograms of optically transparent objects in arbitrary spectral intervals based on acousto-optic filtration of radiation

The problem of obtaining digital holographic images of optically transparent objects in arbitrary spectral intervals is considered. A Mach–Zehnder interferometer based optical scheme with acousto-optic spectral filtration of the broadband radiation is presented. The spectral selection allows one to increase the informativeness of digital holograms due to the choice of spectral channels in which elements with different physico-chemical properties have a sufficient contrast. Examples of recorded spectral holographic images of a test object and real objects are presented.