To provide an optical measuring device and optical current measuring device of high practical use, which are highly precise and stable for a long period of time.
An optics storage box 21 stores a collimator of a transmission fiber 3, polarizer 4, sensor fiber 5 and the collimator, analyzer 7, and optical components except the sensor fiber 5 among optics including collimators of receiving fibers 8. Fiber connectors 15 for constituting respective collimators, attaching members 16 for constituting the collimators of the transmission fiber 3 and reception fibers 8, fixing members of a lens holder 22, adjustment sleeve 23, and connector holder 24 or the like for constituting the collimator of the sensor fiber 5 and the optics storage box 21 are made of nickel alloy steel containing nickel at 30-40%. Spacings between each fixing member, and between each fixing member and the optics storage box 21, are fixed by means of laser welding (laser welding part WL), respectively.
TERAI KIYOHISA
TAKAHASHI MASAO
NIWA KEIKO
