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A light pen is a computer input device in the form of a light-sensitive wand used in conjunction with a computer's cathode-ray tube (CRT) display. It allows the user to point to displayed objects or draw on the screen in a similar way to a touchscreen but with greater positional accuracy.
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.
A pen is a handheld device used to apply ink to a surface, usually paper, for writing or drawing. [1] Additional types of specialized pens are used in specific types of applications and environments such as in artwork, electronics, digital scanning and spaceflight, and computing.
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A light pen is a device similar to a touch screen, but uses a special light-sensitive pen instead of the finger, which allows for more accurate screen input. As the tip of the light pen makes contact with the screen, it sends a signal back to the computer containing the coordinates of the pixels at that point.
The light pen allows the user to "draw", to create images and to indicate, on the screen. It has a photo-detector that can see the bright spot of the vector-drawing display monitor when it goes by under the light pen's position where it is being held to the screen.
The Waterman Hémisphère is a pen introduced in 1994 [1] by the French pen company, Waterman. The Hémisphère is a light pen that has a cigar shaped barrel with a beveled top and usual Waterman clip. It comes in many colours (metallic, blue, green, red, cognac), a lacquer finish, or a brushed chrome or gold finish.
It is stated that the first light pen was also called the "light gun" which, while correct as referenced in Everett 1980, has little to do with the article - light gun - linked, which is the video-game peripheral. Although they could use the same CRT technology (although the article also includes non-examples such as the Wii Remote which is an ...