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Title: Ultra-precision positioning assembly

An apparatus and method is disclosed for ultra-precision positioning. A slide base provides a foundational support. A slide plate moves with respect to the slide base along a first geometric axis. Either a ball-screw or a piezoelectric actuator working separate or in conjunction displaces the slide plate with respect to the slide base along the first geometric axis. A linking device directs a primary force vector into a center-line of the ball-screw. The linking device consists of a first link which directs a first portion of the primary force vector to an apex point, located along the center-line of the ball-screw, and a second link for directing a second portion of the primary force vector to the apex point. A set of rails, oriented substantially parallel to the center-line of the ball-screw, direct movement of the slide plate with respect to the slide base along the first geometric axis and are positioned such that the apex point falls within a geometric plane formed by the rails. The slide base, the slide plate, the ball-screw, and the linking device together form a slide assembly. Multiple slide assemblies can be distributed about a platform. In such a configuration, the platform may bemore » raised and lowered, or tipped and tilted by jointly or independently displacing the slide plates.« less
Authors:
 [1] ;  [2] ;  [3]
  1. (San Francisco, CA)
  2. (Livermore, CA)
  3. (Pleasanton, CA)
Publication Date:
OSTI Identifier:
874535
Report Number(s):
US 6408526
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Patent
Research Org:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA
Country of Publication:
United States
Language:
English
Subject:
ultra-precision; positioning; assembly; apparatus; method; disclosed; ultra-precision; positioning; slide; base; provides; foundational; support; slide; plate; moves; slide; base; geometric; axis; ball-screw; piezoelectric; actuator; separate; conjunction; displaces; slide; plate; slide; base; geometric; axis; linking; device; directs; primary; force; vector; center-line; ball-screw; linking; device; consists; link; directs; portion; primary; force; vector; apex; located; center-line; ball-screw; link; directing; portion; primary; force; vector; apex; set; rails; oriented; substantially; parallel; center-line; ball-screw; direct; movement; slide; plate; slide; base; geometric; axis; positioned; apex; falls; geometric; plane; formed; rails; slide; base; slide; plate; ball-screw; linking; device; form; slide; assembly; multiple; slide; assemblies; distributed; platform; configuration; platform; raised; lowered; tipped; tilted; jointly; independently; displacing; slide; plates; substantially parallel /33/269/