Color holography and its use in display and archiving applications

An overview of the color holographic recording technique is presented along with the equipment and materials required to record, replay and display a color hologram. Color holography is the most accurate imaging technology known to science. It is now possible to produce 3D holographic images for display that are almost indistinguishable from the original object or scene. The application of color holography to museum cataloging, documentation, display and archiving is dThat' siscussed. Color holography offers an alternative route for the display, dissemination, study and investigation of rare or fragile or culturally sensitive artifacts. It offers new possibilities for studying, cataloging, authenticating, the examination, investigation and security of many types of precious objects and artifacts large and small. It also offers a route to novel display techniques and enables artifacts too fragile for normal display to be shown. An advantage is that rare, precious or high value artifacts can be displayed without any concern about theft or damage thus reducing costs for insurance, shipping, etc. The use of scanned digital recording can be used for recording very large objects or the production of displays for exhibition promotion. Until recently display holography was usually associated with monochrome 3D imaging. After the appearance of color holography it has become possible to record holographic images of 2D objects, such as oil paintings. A holographic contact recording of a painting reproduces the painting with all its surface texture details preserved, such as brush strokes, the painter's signature, etc. Possessing an exact copy of the painting could be important for insurance and restoration purposes, in case of theft or damage. The paper also discusses the rendition of color in a hologram. The major advantages of holographic reproduction are discussed together with its limitations.