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Prism Liquid Gate for Total Internal Reflection Holography

IP.com Disclosure Number: IPCOM000091168D
Original Publication Date: 1969-Nov-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Pennington, KS: AUTHOR

Abstract

A prism liquid gate rather than a solid prism is employed in the formation of a hologram using total internal reflection. The prism liquid gate is triangular in shape and has walls 10 of optical quality glass or quartz. The interior volume of the prism is filled with liquid 12 such as an oil or other liquid having an index of refraction matching that of the glass walls. Subject 14, for example, a microcircuit pattern, etc., is located slightly above one wall of the prism. Recording plate 16 for the hologram is located inside the prism slightly below the prism wall opposite the subject 14. The latter is illuminated by a first beam of coherent light 18 which is also directed onto plate 16. Such plate is also illuminated by a reference beam of light 20 which is mutually coherent with beam 18 to form the hologram.

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Prism Liquid Gate for Total Internal Reflection Holography

A prism liquid gate rather than a solid prism is employed in the formation of a hologram using total internal reflection. The prism liquid gate is triangular in shape and has walls 10 of optical quality glass or quartz. The interior volume of the prism is filled with liquid 12 such as an oil or other liquid having an index of refraction matching that of the glass walls. Subject 14, for example, a microcircuit pattern, etc., is located slightly above one wall of the prism. Recording plate 16 for the hologram is located inside the prism slightly below the prism wall opposite the subject 14. The latter is illuminated by a first beam of coherent light 18 which is also directed onto plate 16. Such plate is also illuminated by a reference beam of light 20 which is mutually coherent with beam 18 to form the hologram. The method is a high-resolution recording and reconstruction technique, particularly when photostorage materials are used on plate 16.

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