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  1. PEN - Penumbra, Inc.

    Yahoo Finance

    190.86+2.82 (+1.50%)

    at Tue, Jun 4, 2024, 4:00PM EDT - U.S. markets closed

    Delayed Quote

    • Open 188.00
    • High 193.38
    • Low 188.00
    • Prev. Close 188.04
    • 52 Wk. High 348.67
    • 52 Wk. Low 180.93
    • P/E 79.86
    • Mkt. Cap 7.4B
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  3. Laser pointer - Wikipedia

    en.wikipedia.org/wiki/Laser_pointer

    A laser pointer or laser pen is a (typically battery-powered) handheld device that uses a laser diode to emit a narrow low-power visible laser beam (i.e. coherent light) to highlight something of interest with a small bright colored spot. The small width of the beam and the low power of typical laser pointers make the beam itself invisible in a ...

  4. Diode-pumped solid-state laser - Wikipedia

    en.wikipedia.org/wiki/Diode-pumped_solid-state_laser

    A diode-pumped solid-state laser ( DPSSL) is a solid-state laser made by pumping a solid gain medium, for example, a ruby or a neodymium-doped YAG crystal, with a laser diode . DPSSLs have advantages in compactness and efficiency over other types, and high power DPSSLs have replaced ion lasers and flashlamp-pumped lasers in many scientific ...

  5. Blue laser - Wikipedia

    en.wikipedia.org/wiki/Blue_laser

    A blue laser emits electromagnetic radiation with a wavelength between 400 and 500 nanometers, which the human eye sees in the visible spectrum as blue or violet. [1] Blue lasers can be produced by: direct, inorganic diode semiconductor lasers based on quantum wells of gallium (III) nitride at 380-417nm [2] [3] or indium gallium nitride at 450 ...

  6. List of laser types - Wikipedia

    en.wikipedia.org/wiki/List_of_laser_types

    Nd:YAP laser (yttrium aluminium perovskite) 1.0646 μm [7] Flashlamp, laser diode. Surgery, tattoo removal, hair removal, research, pumping other lasers (combined with frequency doubling to produce a green 532 nm beam) Nd:Cr:YAG laser. 1.064 μm, (1.32 μm) solar radiation. Experimental production of nanopowders.

  7. Excimer laser - Wikipedia

    en.wikipedia.org/wiki/Excimer_laser

    An excimer laser. An excimer laser, sometimes more correctly called an exciplex laser, is a form of ultraviolet laser which is commonly used in the production of microelectronic devices, semiconductor based integrated circuits or "chips", eye surgery, and micromachining . Since the 1960s, excimer lasers have been widely used in high-resolution ...

  8. Helium–neon laser - Wikipedia

    en.wikipedia.org/wiki/Helium–neon_laser

    Helium–neon laser. A helium–neon laser or He-Ne laser is a type of gas laser whose high energetic medium gain medium consists of a mixture of ratio (between 5:1 and 20:1) of helium and neon at a total pressure of approximately 1 Torr (133 Pa) inside a small electrical discharge. The best-known and most widely used He-Ne laser operates at a ...

  9. Laser engraving - Wikipedia

    en.wikipedia.org/wiki/Laser_engraving

    Laser engraving. Laser marked electronic part. Laser engraving is the practice of using lasers to engrave an object. Laser marking, on the other hand, is a broader category of methods to leave marks on an object, which in some cases, also includes color change due to chemical/molecular alteration, charring, foaming, melting, ablation, and more. [1]

  10. Laser pen incident during Euro semi-final not yet a police ...

    www.aol.com/laser-pen-incident-during-euro...

    A laser shone in Denmark keeper Kasper Schmeichel’s face before he saved Harry Kane’s penalty in extra-time. Laser pen incident during Euro semi-final not yet a police matter, Met confirms ...

  11. Orders of magnitude (power) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(power)

    tech: Omega EP laser power at the Laboratory for Laser Energetics. There are two separate beams that are combined. 1.4 × 10 15 W geo: estimated heat flux transported by the Gulf Stream. 5 × 10 15 W geo: estimated net heat flux transported from Earth's equator and towards each pole. Value is a latitudinal maximum arising near 40° in each ...

  12. Nuclear pumped laser - Wikipedia

    en.wikipedia.org/wiki/Nuclear_pumped_laser

    Nuclear pumped laser. A nuclear pumped laser is laser pumped with the energy of fission fragments. The lasing medium is enclosed in a tube lined with uranium-235 and subjected to high neutron flux in a nuclear reactor core. The fission fragments of the uranium create excited plasma with inverse population of energy levels, which then lases.

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