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. 13, 1976
Filed:
Nov. 01, 1972
Richard M Malueg, Glendora, CA (US);
Actron Industries, Inc., Monrovia, CA (US);
Abstract
A two-axis image motion detector detects two separate velocity channels through a single optical channel with a single photo detector. A single disc rotates at a substantialaly constant rotational speed and contains a pair of orthogonal grid patterns of different spatial frequencies. Preferably, each grid pattern is at 45.degree. with respect to a radial. An image focused on the grid pattern modulates the carrier frequencies determined by the different grid patterns, thereby generating a composite output in the single photo detector representing the sum of the two image motion channels. Standard filtering and demodulating techniques generate a DC voltage proportional to the image rate for each of the orthogonal axes.