Those handheld Laser Pointer 50000mw

Those handheld Laser Pointer 50000mw may not be as harmless as you thought.A recent study released by researchers at the National Institute of Standards and Technology (NIST) has revealed an alarming trend. Of 122 hand-held laser pointers tested, 44% of red lasers and 90% of green lasers tested failed federal safety regulations.
The primary culprit was overpowered units. The Code of Federal Regulations in the United States limits commercial class IIIa lasers to 5 milliwatts (mW). And yes, 5mW laser pointer are commercially available in the United States, but it is illegal to market them as Class IIIa devices. Some units in the NIST study tested as high as 13 times over the legal limit at 66.5 mW. For context, many military grade rifle mounted lasers are rated at 50 mW.
A Vacaville man was arrested this week for allegedly shining a bright Laser Pointer Blue 30000mw at two aircraft, the latest in a spate of incidents that have increased in intensity in recent years, authorities say.

The number of incidents of 50mw Green Laser Pointer strikes at aircraft has increased dramatically, Federal Aviation Administration statistics show. While there were 2,837 such cases in 2010, there were 3,984 in 2014.


“Our results raise numerous safety questions regarding laser pointers and their use,” stated NIST laser safety officer in the recent paper presented at the Laser Safety Conference in Orlando, Florida.
Why should backyard astronomers care? Well, since hand-held lasers first became commercially available they’ve become a familiar staple at many public star parties. Reflecting back off of the dust and suspended particles in the atmosphere, a green laser provides a pointer beam allowing the user to trace out constellations and faint objects.
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