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Laser Beam Deflection Device

IP.com Disclosure Number: IPCOM000094838D
Original Publication Date: 1965-Jun-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Smith, WV: AUTHOR

Abstract

The laser deflector shown in A uses a right angle prism 10 of active laser material to which is affixed a pair of mirrors 12. Mirrors 12 form a corner reflector which reflects incident parallel light back in the direction of incidence over a wide range of acceptance angles. A number of individual cavities are completed by reflectors d. Each reflector d is separated from the laser material by a light switch formed of a polarizer a, analyzer c, and electrocoptical element b.

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Laser Beam Deflection Device

The laser deflector shown in A uses a right angle prism 10 of active laser material to which is affixed a pair of mirrors 12. Mirrors 12 form a corner reflector which reflects incident parallel light back in the direction of incidence over a wide range of acceptance angles. A number of individual cavities are completed by reflectors d. Each reflector d is separated from the laser material by a light switch formed of a polarizer a, analyzer c, and electrocoptical element b.

The application of voltages to elements b controls the particular path in which oscillations take place when pumping energy is applied to active material 10. Outputs may be taken through lenses e in which case, reflectors d pass a portion of the incident light. Light may also be coupled out as is in B. Prism 10 is partially silvered and light oscillating in any of the cavities passes through this surface and a body of matching dielectric. The output light for the deflection shown is focused by lens 14 at point 16.

Analyzer c can be eliminated if a quarter wave voltage is selectively applied to electro-optical elements b. A wave returning from the associated reflector d does not pass analyzer c as long as this voltage is applied. Alternatively, polarizer a can be eliminated by using properly cut laser material which produces a polarized output. Three right angle mirrors can be used with a properly formed body of isotropic laser material to produce deflections in thre...