Ruby laser weaknesses in the lining. Ruby lasers were used extensively in tattoo and hair removal, but are being replaced by alexandrite and s in this application. The ruby laser was the first laser to be made functional. Built by Theodore Maiman in 1960, the device was created out of the concept of an "optical maser," a maser that could operate in the visual or infrared regions of the spectrum. In 1958, after the inventor of the maser, Charles Townes, and his colleague, Arthur Schawlow, published an article in the "Physical Review" regarding the idea of optical masers, the race to build
VTech Laser 200 with a slightly updated 16k ROM version, it was driven by a television colour burst (3.54 MHz) crystal. It came with 16k of RAM for programming, along with the same 2k of Video Ram as that of the Laser 200. Within a year of the Laser 310's release, an 80k disk drive unit was released on to the market, of which two could be connected to the computer at the same time. A plug-pack cartridge containing the DOS ROM was required to operate the drives. The DOS ROM and diskette drives were backwards compatible with the Laser 200. A number