Erasable material bacteria rhodopsin: its characteristics and uses in holographic applications

Colleen Mary Fitzpatrick

doi:10.1117/12.59637

1 May 1992 Erasable material bacteria rhodopsin: its characteristics and uses in holographic applications

Colleen Mary Fitzpatrick

Proceedings Volume 1667, Practical Holography VI; (1992) https://doi.org/10.1117/12.59637
Event: SPIE/IS&T 1992 Symposium on Electronic Imaging: Science and Technology, 1992, San Jose, CA, United States

Abstract

The light-harvesting protein in the purple membrane of halobacterium halobium, called bacteria rhodopsin, has been proposed as an erasable holographic storage medium. It has demonstrated erase times on the order of psecs, with a natural reset time of msecs. It has been shown capable of storing both amplitude and phase holograms, or a combination thereof, with diffraction efficiencies on the order of 7%. While this is lower than in some silver halide applications, other properties, such as shelf life and resolution, are outstanding compared to conventional methods. There are many holographic applications of bacteria rhodopsin (bR), but by far one of the most interesting is its potential use in high speed interferometry. Theoretically, bR could act as a temporary recording material for storing interferograms which could then be transferred permanently to a computer via a CCD array. This would greatly increase both the speed and resolution of interferometric technology, and allow for the recording of interferometric 'movies', which is impossible using current holographic recording materials. This and other applications of bR will be discussed, along with its material chemistry and state of technology.

Citation Download Citation

Colleen Mary Fitzpatrick "Erasable material bacteria rhodopsin: its characteristics and uses in holographic applications", Proc. SPIE 1667, Practical Holography VI, (1 May 1992); https://doi.org/10.1117/12.59637

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