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:
Jun. 19, 1990
Filed:
Jan. 17, 1989
Applicant:
Inventors:
Ranjan C Patel, Little Hallingbury, GB;
John H Stibbard, Harlow, GB;
Ronald G Tye, Bishop's Stortford, GB;
Donald J Newman, White Bear Lake, MN (US);
Assignee:
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ; G01D / ; G02F / ;
U.S. Cl.
CPC ...
358302 ; 3461 / ; 350332 ; 3503 / ;
Abstract
Method and apparatus for producing a color image on a photosensitive medium having low sensitivity in which color separation image masks are sequentially generated in a smectic liquid crystal device which may be controlled by a computer and the photosensitive medium is exposed through the image mask. The separation image masks may be altered during exposure to compensate for uneven illumination and to achieve tonal scales.