A ultra-high sensitivity holographic "Ultimate" emulsion (10 nm grains) has been produced, which allows the realization with short exposure times of bright, large sized, with wide view angle and full color holograms of fragile still subjects or monochromatic pulsed reflection holograms of alived subjects. The high transparency of "Ultimate" emulsions as color transmission holograms makes them highly suitable for mastering, the copies keeping the same performances as the master.Copies on other materials, especially polymer emulsions are possible. Coating machines have been performed for the production of 36 x 44 cm triacetate films and 60 x 84 cm glass plates under controlled conditions of temperature and humidity. Also, a homemade portable camera with pulsed YLF or ruby lasers allows to realize holograms in situ of alive subjects on Hi transmission holograms up to 60x80 cm and instant H2 reflection copies up to 30 x 40 cm. Some examples of holograms are displayed.
This paper presents an evaluation of the realism of a full-color reflection H2 analog hologram recorded on ultra-fine-grain silver-halide material. An H2 hologram is a transplane image that is different from the well-known Denisyuk hologram in which the final image appears fully behind the surface of the glass plate. We explain how to record this type of transplane image on the silver-halide holographic material Ultimate 04. Evaluations are performed using a mixed reality experience questionnaire. The realism of our full-color H2 hologram is successfully demonstrated and shows the potential for its integration into a diorama.
When a near-eye display (NED) device reproduces an image at a location close to the eye, the virtual image is implemented at a large angle. The uniformity of the image is unbalanced due to the change in diffraction efficiency by the hologram recording angle and angular selectivity. This study proposes a method for implementing an optimal uniform image by analyzing the diffraction efficiency and the reconstructed image was analyzed using angular selectivity generated while reproducing the source point of the diffused image as an intermediate element by holographic optical element (HOE). This research provides practical results for displaying high diffraction efficiency and immersive holographic images in the NED system with HOE as uniformed intermediate elements.
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