Browse Prior Art Database

Analog Light Scanner and Digital Light Deflector

IP.com Disclosure Number: IPCOM000093776D
Original Publication Date: 1966-Feb-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Duda, WL: AUTHOR [+2]

Abstract

This high-speed apparatus positions a small cross-sectional light beam in either an analog pattern, drawing A or a digital pattern drawing B. Encapsulated liquid crystals are used as birefringent elements.

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Analog Light Scanner and Digital Light Deflector

This high-speed apparatus positions a small cross-sectional light beam in either an analog pattern, drawing A or a digital pattern drawing B. Encapsulated liquid crystals are used as birefringent elements.

In drawing A at 2 and in drawing B at 22 are birefringent elements consisting of, for example, encapsulated deoxyribonucleic acid, DNA, in solution. Other large column-shaped molecules can also be utilized. In addition to having the properties of a liquid crystal these molecules, when placed in an electric field, align themselves in the field direction. The alignment of the molecules determines the optic axis OA of the encapsulated material and with respect to incident light affects the degree of angular separation of the extraordinary ray from the ordinary ray in the birefringent element.

In drawing A, there is a continuously operating analog light scanner. DNA in solution is encapsulated in container 2. Both surfaces of the container have transparent electrodes 4. On the top and bottom of container 2 are bulk electrodes 6. On the sides of container 2 are bulk electrodes 8. A longitudinal electric field, generated by electrodes 4, aligns the molecules parallel to the field. Thus, a liquid crystal is ordered with its optic axis parallel to the field. A voltage applied to electrodes 6 causes a vertical field which adds vectorially to the longitudinal field. Similarly a voltage applied to electrodes 8 causes a horizontal field which adds vectorially to the other fields. The DNA...