Digital holographic microscope (DHM)

With digital holographic microscopy (DHM), micro- and nanostructures can be characterized in 4D, i.e. time- and space-resolved. The method is based on the recording of phase interference images, which are generated by superimposing a reference laser beam with a beam from the same source penetrating the sample. In contrast to other microscopy methods, DHM is characterized by the fact that it is not the projected image of the object that is recorded, but a digital hologram from which an object image can be reconstructed. This approach allows both a precise imaging of complex structures with nanometer resolution and the analysis of dynamic processes such as vibrations with frequencies up to the MHz range.
The available system uses a relection configuration.