Patent ID: 6570623
Filing Date: 2003-05-27
Classification: H04N

Abstract:
A system for blending a first I1 and a second I2 image as projected onto a screen said system comprising:a. a first projection means for projecting said first image I1, said first projection means including a first object plane and a first aperture located a distance Dscreen from said screen; b. a first frame means located a distance Dframe from said first aperture, wherein said first frame means occludes an overlapping portion of said first image I1 that overlaps said second image I2 thereby reducing the intensity of said first image I1 in said overlapping portion; c. a second projection means for projecting said second image I2, said second projection means including a second object plane and a second aperture located a distance Dscreen from said screen; and, d. a second frame means located a distance Dframe from said second aperture, wherein said second frame means occludes an overlapping portion of said second image I2 that overlaps said first image I1 thereby reducing the intensity of said second image I2 in said overlapping portion and, further, and, wherein the combined intensities of overlapping images I1 and I2 is substantially the same as the intensity of said images in regions adjacent to said overlapping images, wherein said first and second apertures each have a diameter Dlens and said images I1 and I2 have a half image width W1 and a region of common overlap Lovlp and, wherein said distance Dframe is optimally determined by the relationship: Dframe=(DlensLovlp+Dlens)Ã—Dscreen&it;â€ƒ.