| http://www.w3.org/ns/prov#value | - Then, the ocular lens 12 is attached, the IDC prism 20 adapted to the type of the objective lens 6 a is inserted into the illumination light axis L1, the focus is brought on the specimen 1 as described above, and thereby, DIC observation visually or with the image pickup device such as a CCD can be made.
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