Method for transmitting two-dimensional information and system f

Details Method for transmitting two-dimensional information and system f Method for transmitting two-dimensional information and system f

1977-07-07

1979-03-06

Corbin, John K.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

250199, 350 368, 350 382, G02B 2700, H04B 900

Patent

active

041427734

ABSTRACT:
A method is disclosed for transmitting two-dimensional information about an object with the aid of a two-dimensional reference signal and a two-dimensional useful signal through an optical communication line. The two-dimensional useful signal is formed by two-dimensional spatial modulation of a coherent light flux. The two-dimensional reference signal is displaced with respect to the two-dimensional useful signal by a time interval which is not in excess of the time instability interval of the communication line. A hologram is recorded at the output of the communication line, of the two-dimensional useful signal matched in time and space with the two-dimensional reference signal. A Fourier hologram can be made of the two-dimensional useful signal and the two-dimensional reference signal in relation to the two-dimensional reference signal, which, when reproduced, makes it possible to obtain the undistorted two-dimensional information that has been transmitted. In addition, a system is disclosed for transmitting two-dimensional information at optical frequencies in accordance with the above method.

REFERENCES:
patent: 3449577 (1969-06-01), Kogelnik
patent: 3567324 (1971-03-01), Brooks
patent: 3752992 (1973-08-01), Fluhr
patent: 3899430 (1975-08-01), Ancker et al.
patent: 3909102 (1975-09-01), Tsunoda et al.
patent: 3953727 (1976-04-01), D'Auria et al.
Goodman et al., Applied Optics, vol. 8, No. 8, Aug. 1969, pp. 1581-1586.
Hill et al., Journal of the Optical Society of America, vol. 61, No. 3, Mar. 1971, pp. 399-402.

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