公开(公告)号：US20170299553A1

公开(公告)日：2017-10-19

申请号：US15637605

申请日：2017-06-29

Applicant: OLYMPUS CORPORATION

Inventor： Ikutoshi FUKUSHIMA ,  Asuka MUKAI ,  Yoshiaki MURAYAMA

IPC: G01N29/06 ,  A61B8/13 ,  G01N29/24 ,  G02B21/00

CPC classification number: G01N29/0663 ,  A61B5/0073 ,  A61B5/0095 ,  A61B8/13 ,  G01N29/06 ,  G01N29/0672 ,  G01N29/22 ,  G01N29/24 ,  G01N29/2418 ,  G02B21/002 ,  G02B21/0028 ,  G02B21/02

Abstract: A photoacoustic microscope objective lens unit includes: an objective lens which irradiates a sample with excitation light L; a photoacoustic wave detection unit which detects a photoacoustic wave U generated from the sample; and a photoacoustic wave guide system. The photoacoustic wave guide system includes: a photoacoustic wave separation member; and an acoustic lens that is disposed between the photoacoustic wave separation member and the sample and has a focus position that substantially matches with a focus position of the objective lens. The acoustic lens is obtained by cementing a main acoustic lens and a correction acoustic lens to each other. The main acoustic lens and the correction acoustic lens satisfy predetermined Conditional Expressions.

公开(公告)号：US20160338576A1

公开(公告)日：2016-11-24

申请号：US15225892

申请日：2016-08-02

Applicant: OLYMPUS CORPORATION

Inventor： Yasushi NAMII ,  Ikutoshi FUKUSHIMA

IPC: A61B1/00 ,  G02B23/24

CPC classification number: A61B1/00193 ,  A61B1/00096 ,  G02B13/04 ,  G02B23/2415 ,  G02B23/243 ,  G02B23/26

Abstract: Provided is a small endoscope objective optical system that allows stereoscopic viewing even though a wide angle is used, that reduces the F-number, and that also reduces vignetting.Provided. is an endoscope objective optical system that consists of, sequentially from the object side, a negative first lens group, a positive second lens group, and a pair of third lens groups that are disposed side-by-side in the direction of parallax and that form two optical images with parallax, wherein aperture stops are individually provided in the third lens groups, and conditional expression M below is satisfied: Fob_n/Fob_p>−0.5   (1), where Fob_n is a focal length of the first lens group, and Fob_p is a focal length of the second lens group.

Abstract translation: 其中Fob_n是第一透镜组的焦距，Fob_p是第二透镜组的焦距。