Optical scanner

Details Optical scanner Optical scanner

1982-01-26

1984-07-31

Lee, John D.

350 61, G02B 5174

Patent

active

044626584

ABSTRACT:
An optical scanner with a thin waveguide medium on a substrate includes means to couple a wide collimated beam of radiation into one end of the medium. A periodic array of substantially parallel, spaced electrodes are associated with one major surface of the medium. At least a portion of their electrode lengths extend in a direction substantially parallel with the direction of radiation propagating through the medium. Supply means is provided to apply voltages in a pattern to the electrodes which varies from one electrode to the next adjacent electrode to a predetermined value over several of the electrodes and the same pattern of voltages or a similar pattern of different voltages is applied over several of the next adjacent electrodes up to the predetermined value. In this manner, the pattern is completed across the electrode array to produce a corresponding approximation of a desired phase retardation along a phase front of the propagating radiation in the medium. Further means is employed to change the magnitude of the applied voltages across the electrode array to vary the approximation of the phase retardation to cause the radiation beam to scan in a direction of radiation propagation in the medium.

REFERENCES:
patent: 4047795 (1977-09-01), Hughes et al.
patent: 4415226 (1983-11-01), Verber et al.
Holladay, "Integrated Optics Scanner," Xerox Disclosure Journal, vol. 2, No. 1, Jan./Feb. 1977, p. 49.
Sasaki et al., "Electro-Optic Multichannel Waveguide Deflector," Electron. Lett., vol. 13, No. 10, May 1977, pp. 295-296.

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