Patent ID: 11965830
Assignee: EVIDENT CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A data acquisition apparatus comprising:
a light source;
a first beam splitter;
a predetermined beam splitter;
a first light deflector;
a second light deflector;
a first measuring unit;
a second measuring unit;
a second beam splitter; and
a photodetector, wherein
a first measurement optical path, a second measurement optical path, and a reference optical path are positioned between the light source and the photodetector,
each of the first beam splitter, the predetermined beam splitter, and the second beam splitter has an optical surface on which an optical film is formed,
at the first beam splitter, from an incident light, light travelling in a first direction and light travelling in a second direction are generated by the optical film,
the second measurement optical path is positioned in the first direction,
the reference optical path is positioned in the second direction,
the predetermined beam splitter is disposed in the second measurement optical path or the reference optical path,
the first measurement optical path is positioned between the predetermined beam splitter and the photodetector,
the first light deflector and the first measuring unit are disposed in the first measurement optical path,
the second light deflector and the second measuring unit are disposed in the second measurement optical path, and
the first measurement optical path and the second measurement optical path intersect.