| helium-neon laser |
A continuous wave laser that contains a mixture of helium and neon gases and emits red coherent light. It is only used to record subjects that do not move. It is manufactured to various power ranges, from 0.5 to 50 milliwatts. Because it is reasonably priced, this type of laser is commonly used by artists and amateurs.
출처: muse.jhu.edu/journals/leonardo/v034/34.4poissant.h...
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