| dc.description.abstract | In this study, we discuss how to create a 360-degree viewable achromatic image conical-type holographic stereogram, and the achromatic effect can be controlled to reconstruction white light. Moreover, we discuss blurry degree of the non-imaging plane.
To produce an achromatic effect in viewing window, we will extend the viewing window. Use the two-step holographic produce to achieve our purpose. In the first step, we will set a diffuser in the optic system to process master hologram. Each wavelength has its viewing window, and due to the extended viewing window, there will have an overlapping range. In the second step, we will divide the area in master hologram, and reconstruct part of master hologram to reconstruct part of the extended viewing window. The diffraction efficiency of each partial extended viewing window can be controlled by exposure energy. As the result, we control the intensity of red, green, blue diffraction light to make the final image’s color is very close to white. Because the hologram record image information on the conical surface that is not image plane. Consequently, we need to discuss image point diffusion on the image plane by image reconstruction to confirm image not blurry.
Use the two-step holographic process, in which we can observe achromatic image by extended viewing window. And due to the diffraction efficiency of red, green, blue wavelength can be controlled. Finally, we can control the color mixing to make achromatic effect obvious.
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