A Magneto-Optic Bubble Display

G. B. Scott; D. E. Lacklison; R. F. Pearson; J. L. Page

doi:10.1117/12.955333

10 April 1977 A Magneto-Optic Bubble Display

G. B. Scott, D. E. Lacklison, R. F. Pearson, J. L. Page

Proceedings Volume 0099, 3rd European Electro-Optics Conf; (1977) https://doi.org/10.1117/12.955333
Event: Third European Electro-Optics Conference, 1976, Geneva, Switzerland

Abstract

Using bismuth iron garnets it is now possible to produce magnetic bubbles in a material exhibiting a very large Faraday effect in the visible region of the spectrum. The magnetic bubbles, small cylindrical volumes of reversed magnetisation in a garnet layer, are very mobile and, as a result of the large Faraday rotation, clearly visible. Controlled generation and propagation of these mobile light spots (typically 10pm in diameter) allows the construction of patterns in which the bubble is the basic picture element. A prototype display which uses a display matrix of 36 x 36 has been made and used to display alphanumerics (capacity of 25) and simple facsimile. Although magnification is required for viewing the information (a 35 x 35 array occupies 1 mm2) a x 10 eyepiece provides good legibility of characters formed on a 7 x 10 matrix. Further properties of this novel display such as non-volatile memory, serial access and writing speed are described in conjunction with possible applications in the areas of radio communications and page composers.

Citation Download Citation

G. B. Scott, D. E. Lacklison, R. F. Pearson, and J. L. Page "A Magneto-Optic Bubble Display", Proc. SPIE 0099, 3rd European Electro-Optics Conf, (10 April 1977); https://doi.org/10.1117/12.955333

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KEYWORDS

Magnetism

Garnet

Bismuth

Geometrical optics

Magneto-optics

Polarizers

Prototyping

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