Patent ID: 8325400

Claim:
A multi-color off-axis digital holographic system, comprising: a plurality of light emitting diodes, for provide a red (R) beam, a green (G) beam and a blue (B) beam; an interference object lens module, for receiving the R, G, and B beams and generating a beam containing an interference signal by combining a reflected reference beam with a scattered object beam resulting from light being scattered by a sample; a color imaging device, for receiving the beam containing the interference signal and forming a respective hologram on a surface of the color imaging device by holographic interference while registering the hologram; and a processing device, for zero-filling the obtained red, green, and blue holograms respectively, to adjust the resolutions of each hologram having different wavelenths to a uniform hologram image array size by defining the uniform hologram image array size for holograms obtained from beams of different wavelen the and settin a reconstruction distance, and receiving the registered hologram from the color imaging device to perform a reconstruction operation using the reconstruction distance, the size and pixel size of the color imaging device, and a phase mask for compensating for lens aberration, obtaining phase information of the red, green, and blue beam, respectively.