| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical observation device and optical observation method that easily acquire an overall in-focus image of works having an entire plane thereof to be observed focused on, and can visually grasp a height of each part of a surface.SOLUTION: An optical observation device comprises: a light source 10 that emits wide-band light; an image fiber 20 that has a first end surface 20a and second end surface 20b, and has an end surface of a plurality of cores arrayed two-dimensionally in the first end surface and second end surface; an image formation optical system 30 that is provided on a first end surface side of the image fiber, and causes light emitted from the first end surface to be formed on an image formation plane; and a longitudinal chromatic aberration optical system 40 that is provided on a second end surface side of the image fiber, has a longitudinal chromatic aberration on an optical axis, and converges light to be emitted from the second end surface and heading for a work. The image fiber is configured to: take in the light emitted from the light source from the first end surface; transmit the taken-in light to the second end surface; take in light reflected and diffused upon a surface of the work, converged via the longitudinal chromatic aberration optical system and focused for each of the plurality of cores on the second end surface from the second end surface; and transmit the take-in light to the first end surface.SELECTED DRAWING: Figure 1 |
