公开(公告)号：US20190265101A1

公开(公告)日：2019-08-29

申请号：US16310563

申请日：2016-07-25

Applicant: SHIMADZU CORPORATION

Inventor： Hiroyuki TOGO ,  Shinji TSUJI

IPC: G01J3/02 ,  G01N21/01 ,  G01J3/10 ,  G03B21/20

Abstract: A photometer (100), which includes a light source (1), an optical element (30) disposed on an optical path P of light emitted from the light source (1), and a detector (5), includes: an attenuating filter (24a) that is disposed on the optical path P and between the light source (1) and the optical element (30), and blocks a portion of the light emitted from the light source (1) and allows the rest of the light to be transmitted through the attenuating filter (24a); and a state monitoring unit (83) that monitors whether or not the light source (1) and the optical element (30) are in a stable state by monitoring light that has been transmitted through the attenuating filter (24a) on the side of a stage subsequent to the optical element (30).