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:
Oct. 24, 1989
Filed:
Jul. 01, 1988
Yasuo Matsumoto, Numazu, JP;
Kazunori Murakami, Shizuoka, JP;
Tomonori Ikumi, Shizuoka, JP;
Yasuo Iwafune, Tokyo, JP;
Tokyo Electric Co., Ltd., Tokyo, JP;
Abstract
A polygon mirror has a plurality of elliptically-curved convex mirror surfaces functioning as light reflection surfaces, each having substantially the same shape as the maximum curvature portion of an ellipse which has long axis b and short axis c. The convex mirror surfaces are uniformly arranged on the circumference of an inscribed circle whose center is set on the long axis b, whose radius is Rm, and which is in contact with the maximum curvature portion of the ellipse. The polygon mirror reflects an incident light beam while being rotated, and scans the incident light beam in the range of effective scanning length Lo on a preset scanning plane which is set at incident light beam travelling distance R from the center of the inscribed circle of the polygon mirror.