| 摘要 |
A test pattern (40) for use with an optical sensor (200) for an inkjet printer (10). The inventive pattern (40) comprises a first plurality of vertical bars (404, 406) horizontally spaced and a second plurality of horizontal bars (408) vertically spaced. The spacing between the bars is approximately equal to the width of the bars. In particular implementation, the pattern (40) is adapted for use with an inkjet printer (10) having a plurality of pens (102, 104, 106, 108). The first plurality of bars (406) includes a first set of bars (420, 422, 424, 426) printed by each of the pens (102, 104, 106 and 108 respectively). The first plurality of bars includes a second set of bars (430, 432, 434, 436, 438, 440) printed by one of the pens (102) moving at at least two different horizontal speeds. The second plurality of bars (408) includes one column of vertically spaced bars (1, 2, 3, 4) for each of the pens (102, 104, 106, and 108 respectively). Each column of vertically spaced bars includes a first plurality of vertically spaced bars (1,1; 1,2; 1,3; 1,4; and 1,5) printed by the first pen (102). A respective column of vertically spaced bars (2,2; 2,3; 2,4) includes a second plurality of vertically spaced bars (2,2; 2,3; 2,4) printed by a respective one of the pens (104, 106, 108). Each column of vertically spaced bars (3,1; 3,2; 3,3; 3,4, 3,5) includes a third plurality of vertically spaced bars printed by the first pen (102). The inventive pattern allows for considerable information with respect to pen alignment to be determined by optical scanning. <IMAGE> |
