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:
Mar. 24, 1998
Filed:
Sep. 20, 1996
Applicant:
Inventor:
Paul Zorabedian, Mountain View, CA (US);
Assignee:
Hewlett-Packard Company, Palo Alto, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 22 ; 372105 ; 372 98 ; 372 92 ;
Abstract
The ideal source for air-turbulence-corrected distance-measuring interferometry is a single laser that generate overlapping beams at two widely separated wavelengths .lambda..sub.1 and .lambda..sub.2. At least one of the wavelengths, as well as the wavelength ratio, must be known to high degrees of accuracy. Furthermore, at each wavelength, the Iaser should produce a pair of orthogonally polarized frequencies with a frequency splitting that is adjustable over the range of approximately 0.5 MHz to 20 MHz to facilitate AC interferemetric distance measurements with a variety of measurement-mirror velocities.