例文
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- An optical flat is usually placed upon a flat surface to be tested.
- Optical flats have uses in spectrophotometry as well.
- The Fizeau interferometer is shown as it might be set up to test an optical flat.
- The interference fringes typically only form once the optical flat begins to wring to the testing surface.
- The block is then slid across a reference grade ( flatness ) quartz optical flat while applying moderate pressure.