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:
Mar. 12, 2013
Filed:
Sep. 14, 2010
Takeshi Tomoe, Tokyo, JP;
Takeshi Tomoe, Tokyo, JP;
The Yoshida Dental Mfg. Co., Ltd., Sumida-ku, Tokyo, JP;
Abstract
A dental x-ray photographing device includes a rotating means () for rotating an arm () which supports an x-ray source () and an x-ray imaging means (), a sliding means () for linearly moving the x-ray imaging means (). The dental x-ray photographing device obtains a first set of projection images which goes through a first region by moving the x-ray imaging means () to a first detection position, obtains a second set of projection images which goes through a second region by moving the x-ray imaging means () to a second detection position, and paste the first set of projection images and the second set of projection images together. An origin-position detecting means () for detecting an origin position of the x-ray imaging means () includes an optical sensor () that detects a position of an end () of a light blocking plate that linearly moves together with the x-ray imaging means (), and detects a time point at which the end () of the light blocking plate passes the optical sensor () in the forward direction as the origin position. According to such a configuration, it becomes possible to obtain a highly precise and large FOV using the x-ray imaging means that has a narrow photo receiving surface.