dc.description.abstract | By controlling the interference angle between the object wave and the reference wave, we can change the grating spacing in our holographic recording. Then, we can obtain the designated wavelength and diffraction angle of the diffracted image at the suitable viewing angle under white-light source illumination. Using this method, a colored transfer hologram will be achieved by which the reconstructed image in red, green, and blue at single viewing window can be perceived by the surrounding observers.
A two-step process is used in our holographic recording. First, by changing the angle between the object wave and the optical axis of object-beam system, we can make three master holograms for the corresponding wavelengths (red, green, and blue) designed for a colored holographic display. In the first-step recording, the size of object information on the image-plane is first determined, and then we can simulate the corrected image we need on the LCD plane. Then, under collimated laser-light illumination, diffracted object beams from three master holograms are retrieved to be imaged onto a single film to form a color hologram. Adopting a white-light source at the designated reconstruction source position, a color 3D image can be displayed for observers around the final hologram simultaneously. The experimental setup is designed based on the weak theory and numerical analysis with a computer. The effects of the parameters influencing the distortions of the final 3D images are also discussed in this study.
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