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  2. Laser pointer - Wikipedia

    en.wikipedia.org/wiki/Laser_pointer

    Laser pointer. Red (635 nm), blueish violet (445 nm), and green (520 nm) laser pointers. 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.

  3. Wheel tractor-scraper - Wikipedia

    en.wikipedia.org/wiki/Wheel_tractor-scraper

    In civil engineering, a wheel tractor-scraper (also known as a land scraper, land leveler or ' tournapull') is a type of heavy equipment used for earthmoving. It has a pan/hopper for loading and carrying material. The pan has a tapered horizontal front cutting edge that cuts into the soil like a carpenter's plane or cheese slicer and fills the ...

  4. Laser construction - Wikipedia

    en.wikipedia.org/wiki/Laser_construction

    Laser construction. Schematic diagram of a typical laser, showing the three major parts. A laser is constructed from three principal parts: An energy source (usually referred to as the pump or pump source ), A gain medium or laser medium, and. Two or more mirrors that form an optical resonator.

  5. The best laser levels for DIY and construction in 2022 - AOL

    www.aol.com/news/best-laser-levels-diy...

    A brighter laser will be visible further; laser glasses and sensors can also assist. A turret design offers beams 360˚ coverage so you can work round a whole room. The best laser levels in 2022

  6. Laser level - Wikipedia

    en.wikipedia.org/wiki/Laser_level

    A rotary laser level set up and used to level sand fill in trenches. The graduated staff is leaning on the pile of sand. In surveying and construction, the laser level is a control tool consisting of a rotating laser beam projector that can be affixed to a tripod. The tool is leveled according to the accuracy of the device and projects a fixed ...

  7. Laser safety - Wikipedia

    en.wikipedia.org/wiki/Laser_safety

    Laser safety. Laser radiation safety is the safe design, use and implementation of lasers to minimize the risk of laser accidents, especially those involving eye injuries. Since even relatively small amounts of laser light can lead to permanent eye injuries, the sale and usage of lasers is typically subject to government regulations.