A transmission holographic microscope is described. The technique consists of using a suitable holographic beamsplitter associated with the condenser of the microscope. An imaging system ensuring optical paths of equal length from the beamsplitter to the recording plane allows the use of this technique in nonmonochromatic light (spectral or arc lamps).
"Noncoherent Microholography Using A Holographic Optical Element As A Beamsplitter," Optical Engineering 20(2), 202233 (1 April 1981). https://doi.org/10.1117/12.7972696