Patent ID: 11879731
Assignee: HAMAMATSU PHOTONICS K.K.
Field: Measurement (Instruments)
Classification: CPC G  B | IPC B  G

Claim 0:
1. A mirror unit comprising:
a mirror device that includes a base including a first surface and a second surface opposite to the first surface, and a movable mirror supported in the base to be movable along a first direction that intersects the first surface;
an optical function member including a third surface that faces the second surface, and a fourth surface opposite to the third surface; and
a fixed mirror that is disposed on a side opposite to the mirror device with respect to the optical function member,
wherein the optical function member is provided with a light passage portion that constitutes a partial portion of an optical path between a beam splitter unit and the fixed mirror, the light passage portion formed by a hole or a notch,
the beam splitter unit constituting an interference optical system in combination with the movable mirror and the fixed mirror, and
the second surface of the base and the third surface of the optical function member are joined to each other.