Abstract: Provided is an optical measurement apparatus including: a polarized light irradiation unit 10 that irradiates a subject Ob with irradiation light of which polarization is controlled; and a polarization imaging unit 20 that images a polarization state of measurement light occurring due to scattering or the like of the irradiation light by the subject Ob, calculates Stokes parameters of the measurement light, and measures a variation of a polarized component occurring between the irradiation light and the measurement light. Since the subject is irradiated with irradiation light of which a polarization state is controlled, it is possible to acquire subject information that is difficult to measure in a case of irradiating the subject with natural light, and it is also possible to suppress noise or the like that occurs when measuring polarization by irradiating the subject with irradiation light of which a polarization state is unstable.

Abstract: To provide a reflected light measurement device capable of efficiently performing disconnection inspection on an optical connector, and a plurality of optical fibers. The reflected light measurement device 1 includes a laser light source 2, a beam splitter 3 that branches measurement laser light L into measurement laser light L1 to be transmitted and reference laser light L2 to be reflected, a reference mirror 4 including an optical path length varying mechanism capable of adjusting an optical path length of the reference laser light L2, an optical path length switching unit 5, and switches the optical path length of the reference laser light L2 to a plurality of fixed lengths, and a photometer 6 that receives measurement laser light L1? reflected at defect sites D1 and D2 such as disconnection inside connectors C1 and C2, and reference laser light L2? reflected by the reference mirror 4.