CD rom drive laser type - Techist - Tech Forum

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Old 11-16-2006, 10:25 PM   #1 (permalink)
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Default CD rom drive laser type

What is the type of laser in a CD Rom drive?

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Old 11-16-2006, 11:30 PM   #2 (permalink)
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Compact Disc players use a 780nm laser diode. This is a bit outside the visible range of light, so I'm guessing you can't see the beam (it's still there even if you don't see it, so don't try it!).

From Wikipedia:

A CD is read by focusing a 780 nm wavelength semiconductor laser through the bottom of the polycarbonate layer.

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