| 摘要 |
The differential interference microscope comprises a beam splitter and a compensator, either one being made of a positive birefringent substance and the other being made of a negative birefringent substance, which are arranged in such a manner that the optic axes of both the prisms are located substantially on the same plane, or a polarizing optical element composed by combining a wedge-shaped prism made of a positive birefringent substance with another wedge-shaped prism made of a negative birefringent substance in such a manner that the optic axes of both the prisms are located substantially on the same plane. The differential interference microscope is capable of providing a uniform visual field without enhancing manufacturing cost therefor nor enlarging the space to be occupied thereby.
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