High resolution halftone microimages and method therefor

Details High resolution halftone microimages and method therefor High resolution halftone microimages and method therefor

1978-01-16

1979-05-08

Brown, J. Travis

Gas separation: apparatus

Electric field separation apparatus

With means to add charged solid or liquid particles to...

96 45, 96 46, 96116, 96118, G03C 504, G03C 1100

Patent

active

041534573

ABSTRACT:
High resolution microimages of continuous tone photographs must be prepared in halftone form to enable inexpensive duplication of the microimages by conventional graphic arts processes. The halftone pattern in such microimages must have a spatial frequency of not less than about 40 line pairs per millimeter in order to enable the projection of an acceptably detailed enlarged image. In the present invention, such halftone microimages are prepared using an ultra-high resolution gradient density screen having therein an image of an interference fringe field resulting from an exposure of a preform of the screen to two interferring mutually coherent beams of radiation.

REFERENCES:
patent: 3589899 (1971-06-01), Hersh
patent: 3748019 (1973-07-01), Bestenreiner et al.
patent: 3885971 (1975-05-01), Kato
patent: 3992206 (1976-11-01), Lamberts
patent: 4069049 (1978-01-01), Reich et al.

Affiliated with

Also associated with

Rating

High resolution halftone microimages and method therefor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High resolution halftone microimages and method therefor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High resolution halftone microimages and method therefor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1232121