Off-axis interferometer

摘要

An Interferometer for off-axis digital holographic microscopy includes a recording plane, and a grating located in a plane optically conjugated with the recording plane. The grating defining a first and a second optical path, the optical path corresponding to different diffraction order.

主权项

1. An off-axis digital holographic microscope comprising:
a spatially and temporally partially coherent light source arranged to produce a first partially coherent light beam; a recording plane; a microscope objective having a front focal plane; an object cell able to hold a specimen to be studied located in the front focal plane of said microscope objective; said object cell being optically conjugated with said recording plane; a grating located in a plane optically conjugated with said recording plane, said grating defining a first optical path and a second optical path, said optical paths corresponding to different diffraction orders; a first lens, said grating being located in the back focal plane of said first lens; a second lens having a front focal plane, the grating being located in the front focal plane of said second lens; and a third lens having a back focal plane and being optically coupled to said second lens, said recording plane being located in the back focal plane of said third lens; wherein temporal coherence and spatial coherence between light beams following said first and second optical paths are maintained on an entirety of the recording plane.