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  2. Mitutoyo - Wikipedia

    en.wikipedia.org/wiki/Mitutoyo

    This led to the rapid growth of manufacturing across various sectors. This focus on manufacturing, allowed Numata to form a research and development facility in Kamata, Tokyo where he began to experiment with the creation of micrometers. Over a period of three years, Numata developed Mitutoyo's first product, a Japanese-manufactured micrometer.

  3. Micrometer (device) - Wikipedia

    en.wikipedia.org/wiki/Micrometer_(device)

    Vernier micrometer reading 5.783 ± 0.001 mm, comprising 5.5 mm on main screw lead scale, 0.28 mm on screw rotation scale, and 0.003 mm added from vernier. Some micrometers are provided with a vernier scale on the sleeve in addition to the regular graduations. These permit measurements within 0.001 millimetre to be made on metric micrometers ...

  4. Micrometer - Wikipedia

    en.wikipedia.org/wiki/Micrometer

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Help; Learn to edit; Community portal; Recent changes; Upload file

  5. Light-emitting diode physics - Wikipedia

    en.wikipedia.org/wiki/Light-emitting_diode_physics

    A LED is a long-lived light source, but certain mechanisms can cause slow loss of efficiency of the device or sudden failure. The wavelength of the light emitted is a function of the band gap of the semiconductor material used; materials such as gallium arsenide , and others , with various trace doping elements , are used to produce different ...

  6. Crystal detector - Wikipedia

    en.wikipedia.org/wiki/Crystal_detector

    This detector was also sometimes used with a small forward bias voltage of around 0.2V from a battery to make it more sensitive. [19] [33] Although the zincite-chalcopyrite "Perikon" was the most widely used crystal-to-crystal detector, other crystal pairs were also used. Zincite was used with carbon, galena, and tellurium.

  7. Infrared spectroscopy - Wikipedia

    en.wikipedia.org/wiki/Infrared_spectroscopy

    Units of IR wavelength are commonly given in micrometers (formerly called "microns"), symbol μm, which are related to the wavenumber in a reciprocal way. A common laboratory instrument that uses this technique is a Fourier transform infrared (FTIR) spectrometer. Two-dimensional IR is also possible as discussed below.