​Paper on Ultra-Realistic Imaging and OptoClones

Recent improvements in solid state CW lasers, recording materials and light sources (such as LED lights) for displaying colour holograms are described. Full-colour analogue holograms can now be created with substantially better image characteristics than previously possible. To record ultra-realistic images depends on selecting the optimal recording laser wavelengths and employing ultra-fine-grain, silver-halide materials. The image quality is improved by using LED display light with improved spatial coherence. Recording museum artifacts using mobile holographic equipment is described. The most recent recorded such holograms (referred to as OptoClones) are the Fabergé Eggs at the Fabergé Museum in St. Petersburg, Russia.

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Yuri Denisyuk looking at a single-beam Denisyuk colour hologram 

Paper on Colour Holography

A paper on colour holography showing how museums have been using ultra-realistic images to display artefacts without having the real object on display. British Museum in London as well as other UK museums have used ultra-realistic images. In particular Museums in Greece have started using  ultra-realistic images when it is not possible to display the real art object. Mobile recording equipment has been developed in Greece, which means that the artefacts can be recorded within a museum. No need to bring objects to a holographic lab.  

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Analogue and digital colour holography is described in the new book Ultra-Realistic Imaging by Hans Bjelkhagen and David Brotherton-Ratcliffe.  This book is only focused on colour holography and how to record ultra-realistic images. Only full colour holography can provide such unique images. Museums have already started to use this 3D imaging technique for recording artefacts which, when on display, the viewer is not able to tell whether he or she is looking at the object itself or an image of it. 

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Buddha Recording

To provide an overhead reference beam, it is sometimes suitable to place the object up-side-down on the table, if possible.

Buddha Colour Hologram.

The Principle of Colour Holography

Recording a Denisyuk colour hologram with three lasers (RGB)

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