The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 19, 2005
Filed:
Feb. 11, 2003
James E. Roddy, Rochester, NY (US);
Robert J. Zolla, Rochester, NY (US);
Leslie Gutierrez, Rochester, NY (US);
James E. Roddy, Rochester, NY (US);
Robert J. Zolla, Rochester, NY (US);
Leslie Gutierrez, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A printing method and apparatus () for pre-exposing a digital watermark image onto a photosensitive medium () at the time of manufacture is disclosed. For exposure energy, the apparatus employs a single color light source () consisting of an array of LEDs. The LEDs are spatially modulated in intensity by means of a reflective LCD array (). The photosensitive medium () may be compensated to allow such single color pre-exposure while avoiding hue shift and contrast loss. The exposure at the film may be increased by: employing partial frame illumination, pulsing the LEDs with high currents with short pulse durations and low duty cycles, employing two LCD devices () to utilize both polarizations, and dichroically combining two LED () arrays of slightly different wavelengths.