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:
Sep. 08, 2009
Filed:
Aug. 30, 2005
Hiroyuki Homma, Sagamihara, JP;
Hiroyuki Homma, Sagamihara, JP;
Olympus Corporation, Tokyo, JP;
Abstract
An optical system for an endoscope can be used by being disposed in the distal end portion of the endoscope, the optical system having a plurality of illumination optical systems, which allow light emitted from a light source to diverge, and an observation optical system, in which at least one of the plurality of illumination optical systems satisfies the following formula (1):0≦−(θ)/θ≦0.025, 10°≦θ≦85°  (1),wherein θ denotes an angle of emission from a center of the illumination optical system, and f(θ) denotes a value obtained by standardizing, at an illuminance at a time when the angle θ of emission is 0°, an illuminance distribution (spherical light distribution characteristics) at a time when a spherical object is illuminated by the illumination optical system.
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