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Light Deflection Apparatus

IP.com Disclosure Number: IPCOM000075099D
Original Publication Date: 1971-Jul-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 61K

Publishing Venue

IBM

Related People

Lipp, J: AUTHOR

Abstract

The plane of polarization of light beam 22 is controllably rotated by rotator 20 and deflected as a function of the angular position of its plane of polarization by a device generally comprising prism 18. Prism 18 is provided with two birefringent plate elements 14 and two containers 4 filled with liquid 36, (e.g., Dow Corning refringent elements 14. Each container 4 also encloses an isotropic aligning element 24. When beam 22 is polarized in a first direction, it is reflected by a birefringent element 14 towards the other element 14 and leaves prism 18 along a first path.

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Light Deflection Apparatus

The plane of polarization of light beam 22 is controllably rotated by rotator 20 and deflected as a function of the angular position of its plane of polarization by a device generally comprising prism 18. Prism 18 is provided with two birefringent plate elements 14 and two containers 4 filled with liquid 36, (e.g., Dow Corning refringent elements 14. Each container 4 also encloses an isotropic aligning element 24. When beam 22 is polarized in a first direction, it is reflected by a birefringent element 14 towards the other element 14 and leaves prism 18 along a first path. When beam 22 is polarized perpendicularly to the first direction it passes birefringent element 14, is reflected by the corresponding isotropic aligning element 34 towards the other element 34, and leaves prism 18 along a second path generally parallel to the first path.

Refraction matching liquid 36 is confined by containers 4 to elements 14 and 34, thus avoiding contact with high-voltage controlled rotator 20 and hence voltage breakdown encountered with known devices wholly immersed in a refraction index matching liquid.

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