US Patent 10488175 Multi wavelength multiplexing for quantitative interferometry

The present invention relates to a new interferometric module which may be implemented as holographic/interferometric portable optical setups that are based on the interferometry with multiple wavelengths acquired simultaneously, without changing the imaging parameters, such as the magnification and the resolution, and recording the quantitative complex wave front (i.e. amplitude and phase) imaging in several wavelengths simultaneously. This may be used for multiple-wavelength phase unwrapping, for recording higher or optically thicker samples or for spectroscopic holography, without loss of camera frame rate due to wavelength scanning.