Optical device for printing planar objects

Details Optical device for printing planar objects Optical device for printing planar objects

1980-02-13

1982-10-12

Evans, F. L.

350 385, G03H 122, G03H 128, G03H 132

Patent

active

043536166

ABSTRACT:
The invention relates to an optical printing device with unity magnification using coherent light and making it possible to significantly reduce speckle on the print.
It relates to a printing device comprising a device for illuminating the object, a device receiving the object wave and in real time restoring a wave phase conjugate with the object wave to form a real image of the object. The printing device also comprises a photosensitive support placed in the image plane. The object illuminating device forms on the object to be reprinted a lighting spot which is of small size compared with the object, and the printing device also comprises scanning means for completely scanning the object a number of times by the lighting spot so as to superimpose a large number of images of the same zone having uncorrelated noises on the photosensitive support.
The invention, more particularly, finds application in the printing of high resolution masks and large surface areas.

REFERENCES:
patent: 3542452 (1970-11-01), Gerritsen
patent: 3640599 (1972-02-01), Van Ligten
patent: 3677616 (1972-07-01), Lewis
patent: 3682526 (1972-08-01), Matsumoto
patent: 3717415 (1973-02-01), Woerdman
patent: 3819248 (1974-06-01), Takeda et al.
patent: 3847465 (1974-11-01), Micheron et al.
patent: 4035055 (1977-07-01), Lurie
patent: 4138189 (1979-02-01), Huignard et al.
patent: 4256363 (1981-03-01), Briones
Physics Letters, vol. 24 (A), No. 2, Jan. 16, 1967-W. Martienssen et al., "Holographic Reconstruction without Granulation", pp. 126-128.
Applied Optics, vol. 14, No. 7, Jul. 1975-S. Som et al., "Noise Reduction by Continuous Addition of Subchannel Holograms", p. 1702.
Journal of the Optical Society of America, vol. 67, No. 1, Jan. 1977, New York-R. Hellwarth "Generation of Time-Reversed Wave Fronts by Nonlinear Refraction", pp. 1-3.
Applied Physics Letters, vol. 32, No. 3, Feb. 1978, New York, S. Jensen et al., "Observation of the Time Reversed Replica of a Monochromatic Optical Wave", pp. 166-168.

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