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. 07, 2017
Filed:
Nov. 29, 2012
Sharp Kabushiki Kaisha, Osaka-shi, Osaka, JP;
Yukio Watanabe, Osaka, JP;
Sharp Kabushiki Kaisha, Sakai, JP;
Abstract
Sensitivity is increased by enhancing the fluorescence collection efficiency while suppressing the increase in size of an objective lens. An objective lensis structured to have a convex lens partin a center portion and to have a truncated conical cylindrical bodyaround the convex lens part. Therefore, a fluorescence component b having too wide an emission angle to fit in the convex lens part, of fluorescence emitted from a sample, can be collected by total reflection on an outer peripheral surfaceof the cylindrical body. Thus, even light having too wide an emission angle to be collected by a normal convex lens can be collected. As a result, it is possible to suppress the increase in size of the objective lens, to enhance the fluorescence collection efficiency, and to prevent the S/N ratio from being decreased by the existence of undetected fluorescence that is blocked by a prism. This can realize a fluorescence information reading device having high sensitivity.