Rainbow hologram

Holograms as videos

Submitted by Jürgen Tenckhoff on Sat, 09/26/2020 - 18:22

The three-dimensional effect of holograms is particularly impressive when the viewer can move around and see the holographic motif from several sides. If you photograph holograms, you inevitably only depict one viewing angle and get a two-dimensional impression.

For this article, we mounted holograms on a rotating body and let them rotate slowly around the vertical axis when illuminated with parallel light. The holographic motif was recorded as HD video with a Nikon D850.

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Holography Museum Lauk in Pulheim

Submitted by Jürgen Tenckhoff on Fri, 09/25/2020 - 16:58

In October 1982 I published an article entitled "Laser technology - breakthrough successful" as the specialist editor of "Idea - Das Magazin für Ingenieure". Since holography was one of my areas of specialization during my studies at the Ruhr University in Bochum, this interesting and future-oriented technology should of course not be missing. In order to cover the wide range of their areas of application, e.g. to round off the nondestructive testing of materials, etc., the artistic aspects of holography should also be examined. While researching, I found Mr.

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Rainbow holograms in art

Submitted by Jürgen Tenckhoff on Fri, 09/25/2020 - 15:47

This example nicely shows the special effect of rainbow holograms: If you tilt them around the horizontal axis, the photo runs through the spectral colors. If you move them around the vertical axis, they show the three-dimensionality of the recorded object. This opens up many possibilities for art projects, since with this method you not only have three representable dimensions but also colors for designing the art object.

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Holography for science and art

Submitted by Jürgen Tenckhoff on Thu, 09/24/2020 - 18:11

While the intensity (amplitude) of the light is recorded in black and white photography, color photography also uses its frequency. In this way, two-dimensional images of our four-dimensional world are generated, which, with the appropriate image composition, can also create a perspective-spatial, three-dimensional impression and, through the choice and representation of a suitable motif, can also create the impression of a temporal component.

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Rainbow holograms for ID cards and art projects

Submitted by Jürgen Tenckhoff on Thu, 09/24/2020 - 14:43

Rainbow holograms are a special type of white light holograms. The technique for generating rainbow holograms was developed in 1968 by Dr. Stephen A. Benton designed. Rainbow holography uses a horizontal slit and / or cylindrical lenses to remove vertical parallax in the output image. This reduces the spectral blurring while maintaining the third dimension in the observation. If you look at a rainbow hologram that is moved around the horizontal axis, you only see the change in colors.

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