Browse Prior Art Database

Light Deflector

IP.com Disclosure Number: IPCOM000095299D
Original Publication Date: 1965-Nov-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Berkowitz, AE: AUTHOR [+2]

Abstract

Multiposition light deflection unit 2 employs prisms 4, 6, 8, etc. Each prism is made from a material, such as europium selenide whose index of refraction changes with a magnetic field applied across a predetermined axis of such prism. Each prism is made narrow, i. e., has a small vertex angle 0. Electrodes 10 and 12 are placed across each prism so that potentials can be applied to them.

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Light Deflector

Multiposition light deflection unit 2 employs prisms 4, 6, 8, etc. Each prism is made from a material, such as europium selenide whose index of refraction changes with a magnetic field applied across a predetermined axis of such prism. Each prism is made narrow, i. e., has a small vertex angle 0. Electrodes 10 and 12 are placed across each prism so that potentials can be applied to them.

Bistable register 14 contains binary information so that each bit of register 14 can be either in 0 or 1 state. When the bit is in its 1 state, a deflecting voltage is applied to its corresponding electrodes 10 and 12. Thus, incoming light 16 entering the deflecting unit from the left is deflected by prism 4. If the binary bit is in the 0 state, no deflecting voltage is applied to electrodes 10 and 12 and no deflection of light 16 takes place.

By changing the binary information in register 14, the amount of deflection D of light 16 can be varied and such variation can be seen at the face of window
18. By the proper selection of materials to be used for prisms 4, 6, 8, etc., and the use of many thin prisms, the number of resolvable spots seen at window 18 can be greater than would be attained if wide prisms are used having multiple, instead of binary, deflecting states.

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