Browse Prior Art Database

Hologram Light Deflector

IP.com Disclosure Number: IPCOM000091358D
Original Publication Date: 1968-Jan-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Habegger, MA: AUTHOR [+2]

Abstract

Light deflection is performed by a hologram. A hologram, formed after exposure to light from a laser source of a single wavelength, provides spatially separated real images when illuminated successively from a laser source having plural wavelengths.

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Hologram Light Deflector

Light deflection is performed by a hologram. A hologram, formed after exposure to light from a laser source of a single wavelength, provides spatially separated real images when illuminated successively from a laser source having plural wavelengths.

The hologram is formed on recording film 1 from a conventional laser 2 having a single-frequency output beam 3. Beam splitter 4 breaks the beam into two components 5 and 6 for interference at film 1 after reflection at mirrors 7 and
8.

Operation as a light deflector involves the selective illumination of the recorded area of hologram 9, the developed film, from laser cavity 10. At any one time a multiple wavelength Laser 11 and electro-optically controlled frequency selector 12 provide a single wavelength beam 15 for acting on hologram 9. Reconstructed image 13 is provided on screen 14. Successive illumination of hologram 9 by other wavelengths provides a one-dimensional spatial deflection of the reconstructed image at screen 14. The image is a circular spot having the same size as the source.

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