On 07/31/2018 09:03 AM, Mr. Man-wai Chang wrote:
On 7/31/2018 8:13 PM, Paul wrote:
...
Â*Â*Â*Â* however, an unsafe power level may be collected by a
Â*Â*Â*Â* magnifying optic with larger aperture."

Looks like that baby is safe. Nothing to worry about.

There are counters with handheld laser scanner. And those handheld
scanners are NOT placed carefully to avoid customers, at least I saw
that in Hong Kong.

Did they do it deliberately? Is it a secret laser experiment? Well...


That beam is moving so fast that the dwell time on the retina is really,
really short--probably tens of microseconds. That helps a lot.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com