公开(公告)号：US10914936B2

公开(公告)日：2021-02-09

申请号：US16579601

申请日：2019-09-23

申请人： OLYMPUS CORPORATION

发明人： Hiroshi Tsuyuki

IPC分类号： G02B23/24 ,  H04N5/225 ,  G02B21/18

摘要： An endoscope includes in order from an object side to an image side, an objective optical system, an optical-path splitter which splits light from the objective optical system into two, and an image sensor which picks up two split images.
A multi-order λ/4 wavelength plate made of a birefringent material is disposed in an optical path between the objective optical system and the optical-path splitter, and the multi-order λ/4 wavelength plate satisfies the following conditional expressions (1) and (2)′. 10≤(d/d0)×0.25≤85  (1) 0.08

公开(公告)号：US11857158B2

公开(公告)日：2024-01-02

申请号：US17009840

申请日：2020-09-02

申请人： OLYMPUS CORPORATION

发明人： Hiroshi Tsuyuki

IPC分类号： G02B17/04 ,  A61B1/00 ,  A61B1/05 ,  G02B27/28 ,  G02B23/24 ,  A61B1/06

CPC分类号： A61B1/00096 ,  A61B1/000095 ,  A61B1/05 ,  A61B1/0655 ,  G02B23/2407 ,  G02B23/2484 ,  G02B27/283

摘要： An optical system includes in order from an object side, an objective optical system, a λ/4 wavelength plate including one birefringent material, a polarizing beam splitter which splits light from the objective optical system into two, and an image sensor which picks up two images split. The polarizing beam splitter causes to occur an axial astigmatism of an opposite sign with respect to an axial astigmatism occurred due to the λ/4 wavelength plate, the following conditional expression (1) is satisfied.

1.1≤Fno/(d/|Δn|)≤49  (1)



where,
Fno denotes an effective F-number of the objective optical system,
d denotes a thickness of the λ/4 wavelength plate, and
Δn denotes a birefringence of the λ/4 wavelength plate for an e-line, provided that, |0.01|

公开(公告)号：US11607114B2

公开(公告)日：2023-03-21

申请号：US16583124

申请日：2019-09-25

申请人： OLYMPUS CORPORATION

发明人： Hiroshi Tsuyuki

IPC分类号： G02B27/14 ,  G02B27/28 ,  A61B1/00 ,  G02B23/04 ,  G02B23/26 ,  G02B23/24

摘要： An endoscope includes in order from an object side, an objective optical system, an optical-path splitter, an image sensor, and an image processor. A λ/4 wavelength plate is disposed between the objective optical system and the splitter. The splitter includes first and second prisms, and has a beam splitting surface at which the first prism and the second prism are brought into close contact. The splitter splits light at the beam splitting surface, into a first optical path through which P-polarized light is transmitted and a second optical path through which S-polarized light is reflected. The first and second prisms are slid relative to one another along the beam splitting surface to adjust optical path lengths of the first and second optical paths, and are disposed at positions to cancel an amount of shift in focusing positions of extraordinary and ordinary light, and satisfy specific conditional expressions.

公开(公告)号：US10893793B2

公开(公告)日：2021-01-19

申请号：US16185064

申请日：2018-11-09

申请人： OLYMPUS CORPORATION

发明人： Hiroshi Tsuyuki

IPC分类号： A61B1/00 ,  A61B1/05 ,  G02B23/24 ,  A61B1/04 ,  A61B1/06 ,  G02B27/12 ,  G02B23/26

摘要： An objective optical system includes a lens group and an optical path splitting element. The optical path splitting element is disposed on an optical path of the lens group, the optical path splitting element includes an optical path splitting surface configured to form a first optical path and a second optical path, an optical path length in the first optical path is different from an optical path length in the second optical path, a sum total of the number of transmissions of light and the number of reflections of light in the second optical path is larger than a sum total of the number of transmissions of light and the number of reflections of light in the first optical path, and an optical surface satisfying following conditional expression (1) is disposed on the first optical path, 0.8≤MR650/MR550≤0.9  (1).

公开(公告)号：US10205888B2

公开(公告)日：2019-02-12

申请号：US15457654

申请日：2017-03-13

申请人： OLYMPUS CORPORATION

发明人： Hiroshi Tsuyuki ,  Mitsujiro Konno ,  Akikazu Yachi

IPC分类号： H04N5/235 ,  A61B1/04 ,  H04N5/232 ,  A61B1/00 ,  A61B1/06 ,  G02B5/30 ,  G02B23/04 ,  G02B23/24 ,  G02B27/00 ,  G02B27/28 ,  H04N5/225 ,  H04N5/265 ,  H04N5/243 ,  H04N9/04

摘要： An endoscope system includes: a generating means generating a compositing mask that serves as compositing ratios of the corresponding pixels between a pair of images acquired by simultaneously imaging two optical images having different focus positions, into which a subject image is divided on the basis of the ratios of contrasts; a correcting means subjecting compositing masks generated for pairs of images acquired in time series, to weighted averaging for respective pixels, thus generating a corrected mask; and an compositing means compositing the two images according to the corrected mask. The correcting means subjects the compositing masks to weighted averaging by performing weighting such that the percentage of the past compositing masks is higher at pixels constituting a static area and an area having contrast lower than a threshold than at pixels constituting a moving-object area or an area having contrast equal to or higher than the threshold.

公开(公告)号：US09030543B2

公开(公告)日：2015-05-12

申请号：US14138083

申请日：2013-12-22

申请人： Olympus Medical Systems Corp. ,  Olympus Corporation

发明人： Hiroshi Tsuyuki ,  Takeshi Suga ,  Masao Sambongi

IPC分类号： H04N9/47 ,  H04N7/18 ,  A62B1/04 ,  A61B1/04 ,  A61B1/06 ,  H04N5/265 ,  G02B23/24 ,  A61B1/00 ,  H04N5/217 ,  H04N5/225 ,  H04N9/07 ,  H04N5/232 ,  H04N5/235 ,  A61B1/05

CPC分类号： H04N5/265 ,  A61B1/00009 ,  A61B1/00096 ,  A61B1/00188 ,  A61B1/05 ,  G02B23/2423 ,  G02B23/2469 ,  G02B23/2484 ,  H04N5/2173 ,  H04N5/2256 ,  H04N5/23212 ,  H04N5/23229 ,  H04N5/2354 ,  H04N7/183 ,  H04N9/07 ,  H04N2005/2255

摘要： An image with an expanded depth of field is more effectively acquired while reducing the manufacturing cost, without enlarging the apparatus.Provided is an endoscope system including: an objective optical system that is provided at an insertion portion tip and that acquires a subject image; an optical path division means for dividing the subject image into two optical images with different focuses; an imaging element that forms the two optical images with different focuses at the same time to acquire two images; an image correction means that corrects the two images acquired by the imaging element so that differences other than the focuses become substantially the same; and an image combination processing unit that selects an image with a relatively high contrast in predetermined corresponding areas between the two images corrected by the image correction means to generate a combined image.

摘要翻译： 在不扩大设备的情况下，更有效地获得具有扩大景深的图像，同时降低制造成本。 提供一种内窥镜系统，包括：物镜光学系统，其设置在插入部分尖端并获取被摄体图像; 光路分割装置，用于将被摄体图像分成具有不同焦点的两个光学图像; 成像元件，同时形成具有不同焦点的两个光学图像以获取两个图像; 图像校正装置，其校正由成像元件获取的两个图像，使得除了焦点之外的差异变得基本相同; 以及图像组合处理单元，其在由所述图像校正装置校正的所述两个图像之间的预定对应区域中选择具有相对较高对比度的图像，以生成组合图像。