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. 24, 2005
Filed:
Sep. 12, 2002
Seiji Nishiwaki, Kobe, JP;
Youichi Saitoh, Hirakata, JP;
Junichi Asada, Kobe, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
The present invention provides the beam-shaping device which includes a first surface on which is formed a first grating through which a beam of light emitted from a light source on an optical axis passes; and a second surface on which is formed a second grating through which the beam of light having passed through the first surface passes; wherein the first grating and the second grating are designed, so as to maintain, when the wavelength of the emitted beam of light varies, a prescribed relationship between (1) the displacement of the first virtual light emitting point, in the first meridian plane containing the optical axis, and (2) the displacement of the second virtual light emitting point, in the second meridian plane perpendicular to the first meridian plane containing the optical axis.