The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 17, 1999
Filed:
Apr. 28, 1995
Lyle D Ostby, Sussex, WI (US);
Giddings & Lewis, Fond du Lac, WI (US);
Abstract
A measurement system for precisely measuring the distance between two points is disclosed. The measurement system includes a laser interferometer assembly having a beam splitter and a first reflector disposed to reflect a laser beam along a linear path. The laser interferometer assembly cooperates with a deadpath elimination cell having a sealed hollow interior region. The hollow interior region is sealed by at least one window disposed at the end of the hollow interior region proximate the first reflector. A second reflector is disposed on the opposite side of the hollow interior region and is oriented to reflect the laser beam back along the linear path. Thus, the volume and quantity of gas within the hollow interior remains constant to increase the accuracy in measuring the distance between the first and second reflectors.