公开(公告)号：US20210389229A1

公开(公告)日：2021-12-16

申请号：US17292174

申请日：2019-11-11

Applicant: THERMO FISHER SCIENTIFIC (SHANGHAI) INSTRUMENTS CO., LTD.

Inventor： Shenghai WU ,  Bin HU ,  Xiaoxian GUO

IPC: G01N15/14 ,  G02B27/09 ,  G02B27/30

Abstract: An optical system is provided which comprises: a light source (1) for emitting light beam; an optical main axis; an optical shaping element (2) for shaping a light beam facing the light source (1) and directly adjacent to the light source (1), wherein the optical shaping element (2) includes a first freeform surface facing the light source (1), the light beam is shaped by means of the first freeform surface of the optical shaping element (2) in such a way that light intensity of the light beam has a flat-top profile on a first axis which is perpendicular to the optical main axis. With this optical system, a desirable light intensity profile can be achieved by using only a single optical element. Moreover, a flow cytometer including this optical system is provided.