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:
Jan. 09, 2007
Filed:
Mar. 05, 2004
Yuji Ikeda, Mitaka, JP;
Michiko Takushima, Yokohama, JP;
Norihide Takeyama, Mitaka, JP;
Genesia Corporation, Tokyo, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
The present invention relates to an optical device having a structure that can make the diameter of the emitted Gaussian beam smaller. The optical device is arranged between a first and second positions, and comprises a first and second optical systems separated with a focus on an intermediate position between the first and second positions. The first optical system, arranged between the first and intermediate positions, comprises a first light entrance surface on which a Gaussian beam having a beam waist, whose radius becomes wat the first position, is incident, and a first light emission surface from which a Gaussian beam having a beam waist, whose radius becomes wat the intermediate position, is emitted. The second optical system, arranged between the intermediate and second positions, comprises a second light entrance surface on which the Gaussian beam emitted from the first optical system is incident, and a second light emission surface from which a Gaussian beam having a beam waist, whose radius becomes wat the second position, is emitted. The radial ratio of the beam waists (w/w) is set so as to become smaller than a geometrical-optical lateral magnification of the optical device.