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:
Nov. 25, 2008
Filed:
Feb. 04, 2005
Tadashi Okuno, Okayama, JP;
Akira Watanabe, Okayama, JP;
Tadashi Okuno, Okayama, JP;
Akira Watanabe, Okayama, JP;
Photo-Physics Laboratory Inc., Okayama, JP;
Cyber Laser Inc., Tokyo, JP;
Abstract
The energy conversion efficiency from light that is to be converted to converted light of a wavelength conversion device is adjusted so as always to be kept stably at a maximum. The wavelength conversion device is provided with a laser light sourcefor generating a fundamental wave light, a nonlinear optical crystalinto which the fundamental wave light is made to enter to generate converted light, and an optical path adjusting portionfor adjusting the direction of propagation of the fundamental wave light and the position of the light beam of the fundamental wave light in order to make the fundamental wave light enter the nonlinear optical crystalwhile satisfying phase matching conditions. The optical path adjusting portionis constituted so as to be provided with a first reflecting mirrorand a second reflecting mirrorand the first reflecting mirror is provided with adjustment means driven by motors Mand Mand the second reflecting mirror is provided with adjustment means driven by motors Mand MAdditionally, the wavelength conversion device is provided with a semi-transparent mirrorfor splitting off and taking out one portion of output lightand a photodetectorfor detecting this split off output light. An electrical signalthat is output from the photodetectoris input into an adjustment value calculating meansand in this adjustment value calculating means, the necessary adjustment values for the adjustment means in the optical path adjusting portionare calculated using fuzzy inference, and this result is output to an optical path adjusting portion control deviceThe optical path adjusting portion control devicecarries out adjustment of the optical path based upon output signalsfrom the adjustment value calculating means