| 摘要 |
PROBLEM TO BE SOLVED: To provide a dark-field cube which can use an objective with a small external diameter for dark-field observation and a microscope equipped with the dark-field cube. SOLUTION: The dark-field cube equipped with a ring slit and a ring-shaped reflecting member which reflects light from the ring slit to a specific direction is characterized in that the reflecting surface of the reflecting member is made concave.
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