| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical waveguide element evaluation apparatus that can separate stray light and evaluate distribution of optical angle distribution in optical waveguide elements.SOLUTION: An optical waveguide element evaluation apparatus comprises optical path setting means (6 and 7) that form an image of a near field pattern 5 of the emitted light end face of an optical waveguide element in the air, a pinhole plate 14 provided with an aperture that transmits an imaged near field pattern 13, and a detector 18 that detects the spreading angle of light at the emitted light end face by using a far field pattern formed by light transmitted by the pinhole plate 14. |
