Optical beam scanning by phase delays

Details Optical beam scanning by phase delays Optical beam scanning by phase delays

1978-06-26

1980-08-26

Davie, James W.

Oscillators

Molecular or particle resonant type

331 945K, 357 18, H01S 319

Patent

active

042197856

ABSTRACT:
A light beam scanner of the moving interference fringe pattern type which includes a body of semiconductor material having a source of coherent radiation and wave guides for guiding the coherent radiation along a plurality of spatially displaced paths which are optically uncoupled, and means associated with the spatially displaced paths for producing relative phase changes between radiation in the different paths whereby interference fringes in the far field are spatially scanned. In addition, wavelength modulation of the laser over a range of about 80 A can be achieved. The source of the coherent radiation can be a single laser or a plurality of optically coupled lasers, and the optical uncoupling can be achieved by spatial displacement of the paths or by insertion of a high loss medium between the paths.

REFERENCES:
patent: 3436679 (1969-04-01), Fenner
patent: 3626321 (1971-12-01), Smith
patent: 3691483 (1972-09-01), Klein
patent: 3701044 (1972-10-01), Paoli et al.
patent: 4159452 (1979-06-01), Logan et al.

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