optical flat वाक्य
उदाहरण वाक्य
मोबाइल
- 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.
- Therefore, any errors or irregularities that exist on the optical flat will affect the results of the test.
- The photons that were scattered by the sample were collected through an optical flat at the end of the tube.
- Then, the bottom of the gauge block is observed ( through the optical flat ) for oil or color.
- Optical flats are extremely sensitive to temperature changes, which can cause temporary surface deviations resulting from uneven thermal expansion.
- To determine whether the surface being tested is concave or convex with respect to the reference optical flat, any of several procedures may be adopted.
- The optical flat should usually never be allowed to fully wring to the surface, otherwise it can be scratched or even broken when separating them.
- These interference fringes determine the flatness of the work piece, relative to the optical flat, to within a fraction of the wavelength of the light.
- The lower section shows how the ? / 4 harmonic interacts in visible light ( green and red ), as photographed in an optical flat . ]]
- To provide an even flatter surface, sometimes the test may be performed on top of another optical flat, with the test surface sandwiched in the middle.
- Testing flatness with an optical flat is typically done as soon a viable interference pattern develops, and then the surfaces are separated before they can fully wring.
- Optical flats are sometimes given an optical coating and used as precision mirrors or optical windows for special purposes, such as in a Fabry P�rot interferometer or laser cavity.
- "' Clear filters "', also known as window glass filters or optical flats, are transparent and ( ideally ) perform no filtering of incoming light.
- The fringes only appear in the reflection of the light source, so the optical flat must be viewed from the exact angle of incidence that the light shines upon it.
- However, if the optical flat is rotated 90 degrees and retested, the fringes will run perpendicular to the valley and it will show up as a row of " V " or " U " shaped contours in the fringes.
- Flatness and parallelism are typically measured with a gauge called an optical flat, a disc of glass or plastic ground with extreme accuracy to have flat, parallel faces, which allows light bands to be counted when the micrometer's anvil and spindle are against it, revealing their amount of geometric inaccuracy.
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