Patent ID: 6674492
Filing Date: 2004-01-06
Classification: H04N

Abstract:
A transparent filter comprising a sheet-shaped body and numerous linear conductive elements arrayed on a surface thereof, which is adapted to be disposed in front of an image device having rectangular pixels; wherein the conductive elements with a linewidth of 50 &mgr;m or less are arrayed on the sheet-shaped body in two directions with a pitch P1 and a pitch P2, respectively; an aperture ratio of the filter is not less than 70%; and when lengths of a pixel of the image device in vertical direction Y and in horizontal direction X are denoted by W1 and W2, respectively, P1, P2, W1 and W2 satisfy one of relations expressed by following equations, that is, both Equation (1) and Equation (2), both Equation (3) and Equation (4), both Equation (5) and Equation (6), or both Equation (7) and Equation (8),n1+0.35&lE;W1/P1&lE;n1+0.65â€ƒâ€ƒ(1) n2+0.35&lE;W2/P2&lE;n2+0.65â€ƒâ€ƒ(2) n1+0.35&lE;P1/W1&lE;n1+0.65â€ƒâ€ƒ(3) n2+0.35&lE;P2/W2&lE;n2+0.65â€ƒâ€ƒ(4) n1+0.35&lE;W1/P2&lE;n1+0.65â€ƒâ€ƒ(5) n2+0.35&lE;W2/P1&lE;n2+0.65â€ƒâ€ƒ(6) n1+0.35&lE;P1/W2&lE;n1+0.65â€ƒâ€ƒ(7) n2+0.35&lE;P2/W1&lE;n2+0.65â€ƒâ€ƒ(8) (Each of n1 and n2 is an integer from 1 to 5).