- "3D Photography by holography", Opt.Eng. V29 N1 (1990) p.9-14, having the cover, the editorial section and color anaglyphic pictures dedicated. Click on the image to see more.

A simple photograph of a hologram can render the original 3D image by chromatic encoding ofparallax!

You can appreciate some depth in the photograph showed here by using celophane paper, red in your right eye, blue or green in your left eye. The "blurring" on the hologram is revealed as a perfect encoding of depth.

 

This discovery was stimulated by my daughter Silvia in 1984, 9 years old at that time.

 

 

In "Holophotography with a diffraction grating", Opt.Eng.V29 N1 (1990) pp.15-18, I showed that the same effect is possible by just using a diffraction grating for photographing through, no laser light being involved!.

This encoding by diffraction conducted to the idea of a decoding by diffraction too, allowing direct visualization of a holographic-like image.

- The projection of this kind of encoded images for direct visualisation had a first description of principles in "New possibilities in the utilisation of holographic screens", Proc. of the SPIE meeting "Electronic Imaging", conference "Practical Holography VI", San Jose-CA-USA, 1992.02.9-14, p.289-293. Available in pdf format . After patent of the idea in 1989, a complete description only came twenty years later.

No glasses are needed by using a diffractive screen!

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