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:
Nov. 28, 2017
Filed:
Oct. 17, 2016
Hoya Corporation, Tokyo, JP;
Fumika Yokouchi, Tokyo, JP;
Chinari Tanaka, Saitama, JP;
HOYA CORPORATION, Tokyo, JP;
Abstract
A light source device for an electronic endoscope includes a light source that emits light having a visible light wavelength region and an optical filter that has transmission peaks at a plurality of particular wavelengths in a continuous wavelength region including the visible light wavelength region. The plurality of particular wavelengths include wavelengths of around 420 nm, around 550 nm and around 650 nm. The optical filter has a constant transmissivity higher than zero and lower than a half of each of the transmission peaks in a wavelength region between the transmission peaks and the constant transmissivity in the wavelength region between the transmission peaks is higher than a transmissivity in a wavelength region other than between the transmission peaks.