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. 03, 2005
Filed:
Mar. 28, 2002
Shoji Yamada, Konan, JP;
Mitsuyoshi Watanabe, Hashima, JP;
Shoji Yamada, Konan, JP;
Mitsuyoshi Watanabe, Hashima, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
In an optical scanning device, a housinghas a spacein the inside thereof. A floating rotational plateis housed in the space, and is caused to float and to rotate by a magnetic force. The floating rotational platehas an optical deflection layerthereon. A diffraction gratingis formed on the optical deflection layeron and around the center axis Z of the floating rotational plate. When a beam of light falls incident on the diffraction gratingin a direction normal to the surface of the optical deflection layer, the diffraction gratingdiffracts the light in a radius direction of the circular-shaped floating rotational plate. The light is transmitted through optical waveguidesandto be emitted outside from the housing. By rotating the small-sized floating rotational plateat a high speed inside the housing, it is possible to scan the light at a high speed and with a high resolution.