Patent ID: 11934012
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC F  G

Claim 0:
1. An optical adjustment apparatus for use in coupling a first optical fiber to an optical substrate being a coupling destination, the first optical fiber having an exit-side end portion, the optical substrate having a substrate-end surface, the optical adjustment apparatus comprising:
a measurement-light irradiation part including
a plurality of second optical fibers having exit-side end portions,
the measurement-light irradiation part being configured to emit a plurality of lights with respective timings different from each other via the plurality of second optical fibers, the plurality of lights having a single wavelength;

an optical fiber block configured to hold the exit-side end portion of the first optical fiber and the exit-side end portions of the plurality of second optical fibers, the optical fiber block having a block-end surface;
a light detection part configured to receive and detect a plurality of reflected lights via the plurality of second optical fibers, the plurality of reflected lights being reflected off the substrate-end surface of the optical substrate and corresponding to the plurality of lights;
a tilt calculation part configured to compare, with each other, variations with time of intensities of the plurality of respective reflected lights and to calculate a tilt of the optical fiber block relative to the optical substrate based on a result of the comparison of the variations with time; and
a distance calculation part configured to calculate an inter-end surface distance between the substrate-end surface of the optical substrate and the block-end surface of the optical fiber block, based on a variation with time of an intensity of at least one of the plurality of reflected lights.