G - Physics – 03 – B
Patent
G - Physics
03
B
18/104, 26/197,
G03B 21/60 (2006.01) B29D 99/00 (2010.01) G03B 21/62 (2006.01) G03B 35/24 (2006.01) H04N 13/00 (2006.01)
Patent
CA 2030358
Improved screen for the reproduction of three-tridimensional still or moving images, and a method for manufacturing it. The screen is characterised in that the sheets of cylindrical lenses are optically convergent and/or divergent; both sheets of cylindrical lenses are formed by cylinders of semi-circular cross-section, juxta- posed in their axial direction, and are arranged on one or both faces of the screen, wherein it could occur that either a) the angle alpha between the two sheets is equal to 90°, the sheet of vertical cylindrical lenses then being covered by a transparent substance with a refractive index n'; or b) this angle is less than 90°; or c) this angle alpha is less than 90°, and that the sheets of cylindrical lenses are covered with a substance with a refractive index n'. The method involves: a) preparing a first mould; b) producing a counter-mould; c) producing a final mould; and d) moulding the sheets by pressing with the final mould.
Dominguez Montes Juan
Swabey Ogilvy Renault
LandOfFree
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