公开(公告)号：EP3329832A1

公开(公告)日：2018-06-06

申请号：EP16830231.3

申请日：2016-07-01

申请人： Olympus Corporation

发明人： KATO Takayuki ,  TOMIOKA Makoto ,  INOUE Takahiro ,  MORITA Kazuo

IPC分类号： A61B1/04 ,  A61B1/00

CPC分类号： A61B1/051 ,  A61B1/00096 ,  A61B1/00165 ,  A61B1/00186 ,  A61B1/00188 ,  A61B1/042 ,  A61B1/043 ,  A61B1/045 ,  A61B1/055

摘要： There is provided a camera head for endoscope which enables to achieve a favorable fluorescent image in any wavelength band when the observation is switched over from a normal white-light image observation to an observation of fluorescent images of different wavelength bands.
The camera head for endoscope includes a camera-head optical system LS which includes a spectral prism 10 having a dichroic film 13 which splits light from the endoscope into white light and fluorescent light, and a first image pickup element 14 and a second image pickup element 15 which are disposed in respective optical paths split into two by the spectral prism 10, and the first image pickup element 14 is for the white-light image observation in which a white-light image is captured, and the second image pickup element is for a fluorescent-image observation in which two fluorescent images of different wavelengths are captured, and the first image pickup element 14 is disposed at a position at which an image is formed in an optical path for the white-light image observation, and the second image pickup element 15 is disposed at a position between two positions at which the two fluorescent images are formed in an optical path for the fluorescent-mage observation, and the camera head for endoscope satisfies the following conditional expression (1). d ≤ 9 × P × Fno

公开(公告)号：EP3306388A1

公开(公告)日：2018-04-11

申请号：EP16803047.6

申请日：2016-05-18

申请人： Olympus Corporation

发明人： KATO Takayuki

IPC分类号： G03B3/04 ,  A61B1/00 ,  A61B1/04 ,  G02B7/105 ,  G02B7/28 ,  G02B13/04 ,  G02B23/24 ,  G03B3/06

CPC分类号： G02B23/2407 ,  A61B1/00 ,  A61B1/04 ,  G02B7/105 ,  G02B7/28 ,  G02B13/04 ,  G02B23/2423 ,  G02B23/243 ,  G02B27/642 ,  G03B3/06 ,  G03B3/10 ,  G03B5/00 ,  G03B17/17

摘要： There is provided an image pickup unit which is capable of achieving a focused image of a favorable depth of field while changing a visual field direction of observation.
The image pickup unit comprises a front group FG which includes prisms P1, P2, and P3 which can be rotated for changing the visual field direction, and a rear group RG which includes a lens group LNS and an image pickup element 15, and includes a prism rotating section 16 which rotates the prism P1 for changing the visual field direction, and a focusing section 17 which moves a focused range toward a near-point side, as an angle of visual field direction with respect to a longitudinal direction of the image pickup unit becomes larger than a specific angle, in accordance with the rotation of the prism P1.

摘要翻译： 提供了一种图像拾取单元，其能够在改变观察的视野方向的同时实现有利景深的聚焦图像。 图像拾取单元包括前组FG和后组RG，前组FG包括可旋转以改变视场方向的棱镜P1，P2和P3，后组RG包括透镜组LNS和图像拾取元件15，并且包括 使棱镜P1旋转以改变视野方向的棱镜旋转部分16以及将聚焦范围朝向近点侧移动的聚焦部分17作为视场方向相对于图像拾取器的纵向的角度 单元根据棱镜P1的旋转变得大于特定角度。