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:
Jan. 10, 2006
Filed:
Dec. 13, 2002
Kazuhiro Kumei, Tachikawa, JP;
Takeshi Suga, Hachioji, JP;
Hisao Yabe, Hachioji, JP;
Tsutomu Hirai, Sagamihara, JP;
Jun Hiroya, Iruma, JP;
Hiroshi Ishii, Tokyo, JP;
Kazuhiro Kumei, Tachikawa, JP;
Takeshi Suga, Hachioji, JP;
Hisao Yabe, Hachioji, JP;
Tsutomu Hirai, Sagamihara, JP;
Jun Hiroya, Iruma, JP;
Hiroshi Ishii, Tokyo, JP;
Olympus Corporation, Tokyo, JP;
Abstract
An endoscope system consists mainly of: an endoscope having a solid-state imaging device and an objective optical system that converges an object image on said solid-state imaging device; and a signal processing unit that processes an image signal produced by the endoscope so as to produce a video signal. The objective optical system includes an optical phase modulation member. The optical phase modulation member exhibits a response of 0.2 or more derived from an optical transfer function relative to a spatial frequency on the solid-state imaging device determined based on the Nyquist theorem, that is, a Nyquist frequency, over a wider range of distances than a depth of field offered by an objective optical system not having the optical phase modulation member.