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

Claim 11:
12. An optical adjustment method for use in coupling a first optical fiber to an optical substrate being a coupling destination, the optical adjustment method comprising:
holding, with an optical fiber block, an exit-side end portion of the first optical fiber and exit-side end portions of a plurality of second optical fibers for use in measurement;
emitting, with respective timings different from each other, a plurality of lights having a single wavelength via the plurality of second optical fibers;
receiving and detecting a plurality of reflected lights via the plurality of respective second optical fibers, the plurality of reflected lights being reflected off a substrate-end surface of the optical substrate and corresponding to the plurality of lights;
comparing, with each other, variations with time of intensities of the plurality of respective reflected lights and calculating 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
calculating an inter-end surface distance between the substrate-end surface of the optical substrate and a 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.