Patent ID: 6525546
Filing Date: 2003-02-25
Classification: G01B,G01D

Abstract:
A capacitive displacement sensor comprising:a subsidiary scale, said subsidiary scale including a plurality of emitting electrodes and a receiver electrode said plurality of emitting electrodes having a plurality of electrode groups, said plurality of electrode groups have a first electrode group and a second electrode group, said first electrode group having a plurality of first electrodes of said plurality of emitting electrodes, said second electrode group having a plurality of second electrodes of said plurality of emitting electrodes, and said receiver electrode having a first side and a second side opposite to said first side, said first electrode group being spaced from said first side, said second electrode group being spaced from said second side, said first side being closer to said first electrode group than to said second electrode group, said second side being closer to said second electrode group than to said first electrode group.