Patent ID: 11933609
Assignee: YOKOGAWA ELECTRIC CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An interferometer, comprising:
a first optical component that splits each of a P polarization component and an S polarization component of a light to be measured that is incident on the interferometer into a first optical path and a second optical path and combines the light to be measured that is split into the first optical path and the second optical path;
a second optical component placed in the first optical path;
a third optical component that splits the light to be measured, which is combined by the first optical component, into the P polarization component and the S polarization component; and
a P polarization detector and an S polarization detector that detect respectively the P polarization component and the S polarization component that are split by the third optical component, wherein
the second optical component includes a prism made of glass material which has an optical surface that changes a propagation direction of the light to be measured and gives a phase difference between the P polarization component and the S polarization component,
the first optical component, the second optical component and the third optical component are all integrated, and
the second optical path passes only inside the first optical component.