Patent ID: 6876452
Filing Date: 2005-04-05
Classification: G01B

Abstract:
1. Apparatus for the high accuracy, multiple degree of freedom metrology and positioning of a body, said apparatus comprising: a first element made preferably from a low temperature coefficient, temporally stable material including integral metrology surfaces each of which is used as one surface of a measuring system and are configured and arranged to serve as a metrology frame; a second element made from a low temperature coefficient, temporally stable material including integral metrology surfaces which are used in conjunction with the integral metrology surfaces on said first element; at least one slide and at least one actuator for moving said second element relative to the first element by a large distance in at least one dimension; and multiple measuring systems configured and arranged to operate in conjunction with said integral metrology surfaces of said first and second elements to provide information by which the position and angular attitude of said second element with respect to said first element can be determined.