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. 08, 2005
Filed:
Jan. 18, 2001
Koujirou Sekine, Ibaraki, JP;
Mitsuru Yokoyama, Takatsuki, JP;
Miyuki Teramoto, Osakasayama, JP;
Kyu Takada, Otsu, JP;
Takuji Hatano, Suita, JP;
Shinji Maruyama, Sapporo, JP;
Tsuyoshi Iwamoto, Nishinomiya, JP;
Koujirou Sekine, Ibaraki, JP;
Mitsuru Yokoyama, Takatsuki, JP;
Miyuki Teramoto, Osakasayama, JP;
Kyu Takada, Otsu, JP;
Takuji Hatano, Suita, JP;
Shinji Maruyama, Sapporo, JP;
Tsuyoshi Iwamoto, Nishinomiya, JP;
Minolta Co., Ltd., Osaka, JP;
Abstract
On a waveguideformed on a substrate, a plurality of comblike shaped electrodesthat generate surface acoustic wavesfrom different directions are provided. And a periodic refractive indices portionis formed, where the refractive indices are periodically distributed in accordance with the wavelengths of the surface acoustic wavesgenerated by applying a voltage to the comblike shaped electrodes. And by changing a frequency of the applying voltage for sequentially changing the wavelengths of the surface acoustic wavesthe exiting direction of the light exiting from the periodic refractive indices portionis scanned. This makes it possible to provide an optical functional device and an optical scanning apparatus that perform light scanning less costly but at a high speed, and that can secure a wide scanning angle.