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:
May. 29, 2018
Filed:
Jul. 31, 2015
Kabushiki Kaisha Topcon, Itabashi-ku, JP;
Yoshikatsu Tokuda, Itabashi-ku, JP;
Yoshiaki Goto, Itabashi-ku, JP;
KABUSHIKI KAISHA TOPCON, Itabashi-ku, JP;
Abstract
Light with a short pulse width is emitted using a simple structure. A light source, a differentiation circuit, and a switchare connected in series. When the switchis switched on, inrush current flows in a capacitorforming the differentiation circuit, and accordingly the light sourceis supplied with electric current and thereby emits light. When the capacitoris charged, electric current flows in a resistor, and voltage drops at the resistor. Then, the voltage applied to the light sourceis decreased, whereby the light sourcestops emitting light. By using the inrush current at the capacitor, light with a short pulse width can be generated.