| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of inspecting microneedles, which enables highly accurate inspection of transparent or translucent microneedles.SOLUTION: A method of inspecting microneedles involves capturing an image of transparent or translucent microneedles arranged on a transparent or translucent sheet with a camera from an oblique direction relative to a surface with the microneedles arranged thereon, and inspecting the microneedles based on the acquired image. Defining a sheet surface having the microneedles arranged thereon as a first sheet surface and a sheet surface opposite the first sheet surface as a second sheet surface, the method includes irradiating the second sheet surface with illumination light from an oblique direction to make tip portions of the microneedles appear dark and a base portion thereof bright, capturing an image of the microneedles, and inspecting the microneedles based on the acquired image.SELECTED DRAWING: Figure 6 |
