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:
Feb. 07, 2012
Filed:
Nov. 18, 2008
Akinori Araya, Yokohama, JP;
Akinori Araya, Yokohama, JP;
Olympus Corporation, Tokyo, JP;
Abstract
A light source apparatus is provided which includes semiconductor laser elements that emit laser light according to an inputted current signal, a light receiving element that receives the laser light emitted from the semiconductor laser elements, and a controller that controls light emission of the semiconductor laser elements. The controller includes a first semiconductor laser element drive circuit that outputs a current signal to the semiconductor laser elements according to an instruction signal, a second semiconductor laser element drive circuit that adjusts the current signal based on a light quantity of the laser light received by the light receiving element, and outputs the adjusted current signal to the semiconductor laser elements, and a circuit switching section that switches between the first and the second semiconductor laser element drive circuits according to an instruction signal.