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:
Apr. 21, 2015
Filed:
Sep. 24, 2010
Yoshio Natsume, Hamamatsu, JP;
Yoshio Natsume, Hamamatsu, JP;
Hamamatsu Photonics K.K., Hamamatsu-shi, Shizuoka, JP;
Abstract
The present invention aims to provide a highly reliable relief pattern detection device, including a slant FOPhaving an input end surfacewith which an object surface makes contact and an output end surfacesubstantially parallel to the input end surface, an irradiation light sourcedisposed on the output end surfaceside of the slant FOP, for irradiating the output end surfacewith light, and a CCD cameradisposed on the output end surfaceside of the slant FOP, for detecting a relief pattern based on light emitted from the output end surface, in which optical axes Rf of optical fibers are inclined so as to create a first angle α less than 90° in one direction from the output end surfacewithin a predetermined plane substantially perpendicular to the output end surface, the irradiation light sourceirradiates the output end surfacewith light in a direction to create a second angle β less than 90° in the other direction from the output end surfacewithin the predetermined plane, and the first angle α and the second angle β are set so that light made incident from the output end surfaceinto a coreof the optical fiberenters into a cladding