Cryptography – By modifying optical image
Patent
1989-01-03
1991-07-23
Buczinski, Stephen C.
Cryptography
By modifying optical image
380 9, 273139, 283 94, 283102, 283903, H04K 100, B42D 1500
Patent
active
050349821
ABSTRACT:
A method for producing a scrambled image for deciphering by a lenticular lens having a specific regular lineation, by exposing two photographic film negatives to two desired images and processing each film negative to form two image negatives, and by contacting and exposing one of said image negatives to a working negative through a first grating screen having the same regular lineation as the lenticular lens, to create a lineated image of said first image negative on said working negative, and then contacting and exposing the other image negative to said working negative through a second grating screen having the same regular lination as the lenticular lens, whereby said second grating screen is aligned with respect to said working negative complementary to the alignment of said first grating screen during said first contacting and exposing step such that lineated images of one negative are formed on said working negative which are parallel to and between the lineations of the image of the other image negative. The working negative is then exposed to create the desired positive scrambled lineated image.
REFERENCES:
patent: 1592034 (1926-07-01), Macy
patent: 1882424 (1932-10-01), Ives
patent: 1984004 (1934-12-01), Wildhaber
patent: 1989552 (1955-01-01), Kawolt
patent: 2815310 (1956-12-01), Anderson
patent: 2952080 (1960-09-01), Avakian et al.
patent: 3178993 (1965-04-01), Ferris et al.
patent: 3241429 (1966-03-01), Rice et al.
patent: 3524395 (1970-08-01), Alasia
patent: 3676000 (1972-07-01), Mayer, Jr. et al.
patent: 3692312 (1972-09-01), Meyer
patent: 3769890 (1973-11-01), Alasia
patent: 3781104 (1973-12-01), Dubuisson
patent: 3914877 (1975-10-01), Hines
patent: 3937565 (1976-02-01), Alasia
patent: 4092654 (1978-05-01), Alasia
patent: 4198147 (1980-04-01), Alasia
Heninger Bryne E.
Sullivan Philip B.
Buczinski Stephen C.
Dittler Brothers, Inc.
Gregory Bernarr Earl
LandOfFree
Lenticular security screen production method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Lenticular security screen production method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lenticular security screen production method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-438549