| 摘要 |
Disclosed is an interferometer using therein a beamsplitter having a thin-film, transparent substrate; a plurality of stripes, each stripe being reflective from both sides and affixed to the substrate; and two mirrors positioned such that as a wavefront of light is divided by the beamsplitter, the divided beams impinge upon the mirrors, whereby when one mirror is moved toward or away from the beamsplitter, the beams impinging upon the movable mirror are changed in phase from the beams impinging upon the other mirror, the phase being measured by a light detector.
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