Patent ID: 11874172
Assignee: SHIMADZU CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A Fourier transform infrared spectrophotometer comprising:
a main interferometer including an infrared light source that emits an infrared light beam, a beam splitter, a fixed mirror, and a moving mirror;
a control interferometer including a control light source that emits a control light beam, the beam splitter, the fixed mirror, and the moving mirror;
an infrared detector that detects an infrared interference light beam that is generated by the main interferometer and passes through a sample or is reflected by the sample;
a control light detector that detects a control interference light beam generated by the control interferometer;
a waveplate disposed on an optical path of the control light beam and between the fixed mirror or the moving mirror and the beam splitter; and
a support member that supports the waveplate,
wherein an outer perimeter of the waveplate includes
a supported region supported by the support member, and
a released region spaced apart from the support member.