公开(公告)号：US20240142789A1

公开(公告)日：2024-05-02

申请号：US18495946

申请日：2023-10-27

Applicant: SYSMEX CORPORATION

Inventor： Takuya KUWANA ,  Takeshi SUGIYAMA ,  Kazuhiro YAMADA ,  Ayato TAGAWA

IPC: G02B27/42 ,  G01N15/14

CPC classification number: G02B27/4205 ,  G01N15/1436 ,  G01N15/1459 ,  G01N2015/0065

Abstract: Disclosed is an optical system including: a light source configured to emit light; an irradiation optical system including a diffractive optical element on which the light is incident, the irradiation optical system being configured to apply illumination light in which a plurality of diffracted lights generated by the diffractive optical element are distributed; a flow cell in which a sample containing cells is caused to flow to a position at which the illumination light is applied by the irradiation optical system; and a light receiver configured to receive light generated from each cell flowing in the flow cell, upon application of the illumination light by the irradiation optical system. The illumination light includes zero-order diffracted light whose relative intensity relative to another diffracted light is not greater than 10 times. The irradiation optical system applies the illumination light to a position through which the cell in the flow cell passes.