Endoscope system for generating a composite image from optical images of different focus

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United States of America Patent

PATENT NO 9949622
SERIAL NO

15342414

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Abstract

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An endoscope system includes an objective optical system OBL, an optical path splitting unit which splits an object image acquired by the objective optical system OBL into two optical images having a different focus, an image pickup element which acquires the optical images, and an image synthesis processing section which selects in a predetermined area an image with a relatively high contrast from the two optical images acquired, and generates a composite image, wherein the objective optical system OBL includes a first lens L1 having a negative refractive power which is nearest to object, and the endoscope system satisfies the following conditional expressions (1) and (2).

description='In-line Formulae' end='lead'3<D_diff/im_pitch≤100  (1)description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'0.005<D_diff/R1_r<1.0  (2)description='In-line Formulae' end='tail'

    where,D_diff denotes an air conversion length of a difference in length of optical paths of the two optical images,im_pitch denotes a pixel pitch of the image pickup element, andR1_r denotes a radius of curvature at an image-side surface of the first lens having a negative refractive power.

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Patent Owner(s)

Patent OwnerAddress
OLYMPUS CORPORATION2951 ISHIKAWA-MACHI HACHIOJI-SHI TOKYO 192-8507

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Katakura, Masahiro Chofu, JP 41 143

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