公开(公告)号：US11002708B2

公开(公告)日：2021-05-11

申请号：US15637605

申请日：2017-06-29

Applicant: OLYMPUS CORPORATION

Inventor： Ikutoshi Fukushima ,  Asuka Mukai ,  Yoshiaki Murayama

IPC: G01N29/06 ,  G02B21/02 ,  G02B21/00 ,  G01N29/22 ,  G01N29/24 ,  A61B5/00 ,  A61B8/13 ,  G10K11/30

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.