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:
Apr. 28, 1987
Filed:
Feb. 10, 1986
Thomas E Welmers, Santa Monica, CA (US);
Theodore R Whitney, Woodland Hills, CA (US);
T. R. Whitney Corporation, Reseda, CA (US);
Abstract
Apparatus (10) for controlling a beam (12) of coherent light includes a reference scale (38, 138) provided with indicia forming a plurality of spokes having two sets of properties. The first of the two sets of properties is an evenly spaced first set of edges (41) arranged for generating a data clock exactly referenced to a position of a first of the two separate, perpendicular directions. A second set of edges (44) are each spaced variably from an associated one of the first set of edges (41) as a function of the other of the two separate, perpendicular directions, making the second of the two sets of properties a variable width of each of the spokes.