Patent ID: 11971296
Assignee: KABUSHIKI KAISHA NIHON MICRONICS
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 7:
8. The measurement method according to claim 1, further comprising calculating a radiation angle γ of the emission light of the optical semiconductor element including a light-emitting part having a side with a length of a in a shifting direction in which the relative position is shifted, and a side with a length of b in a direction intersecting with the shifting direction in accordance with the following equation:

γ=2×tan−1{[Dm−(a+2Se)]/2WD}

where 2Se is an effective incident range of the emission light that is transmitted only through a core part of the optical probe, WD is the working distance, and Dm is a shifted distance in which the plurality of measured incident intensities are greater than zero in the incident intensity pattern.