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:
May. 31, 1983
Filed:
Mar. 27, 1981
Applicant:
Inventor:
Gerhard Westerberg, Djursholm, SE;
Assignee:
Micronic AB, Danderyd, SE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01B / ;
U.S. Cl.
CPC ...
356358 ;
Abstract
A compensating device in combination with a laser interferometer, which laser interferometer comprises a laser (1), a prism (6) rigidly connected to a movable object, a beam splitter prism (2) and a stationary prism (3). The wavelength of the laser light is subject to changes by external factors, for example meteorologic ones. The compensating device includes mechanism (4,5) capable to change the position of the stationary prism (3) in response to and by means of an electric signal, which represents the desired compensation for magnitudes affecting the accuracy of the laser interferometer.