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:
Sep. 25, 1990
Filed:
Nov. 30, 1989
Nobuhiko Kubo, Hino, JP;
Yamashita Denso Corporation, Tokyo, JP;
Abstract
A method of adjusting a light source position in a convergence device is employed for a convergence device having a spheroidal mirror and a discharge tube disposed within the spheroidal mirror, such that the vicinity of a tip of a cathode of the discharge tube is generally aligned with a first focal point of the spheroidal mirror whereby light from the discharge tube converges at a second focal point, and wherein two peep holes are provided in the spheroidal mirror at locations corresponding to a plane surface including the first focal point and perpendicular to an optical axis of the spheroidal mirror, wherein in said peep holes are offset by 90 degrees with respect to one another in the plane surface. The method includes the steps of projecting light from a point source or an optical fiber light guide from the second focal point toward the spheroidal mirror, such that the projected light converges at the first focal point, when the discharge tube is off, observing the projected light and the discharge tube through the two peep holes, and adjusting the position of the discharge tube based upon the observed position of the projected light and the discharge tube from the two peep holes, such that the vicinity of the tip of the cathode of the discharge tube is aligned with the first focal point.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile