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Reviews (1)
Jul 14, 2017
True blue and bright, if not perfectly tight
3 of 3 found this helpful Your mileage may vary, but I'm quite pleased with the item that I received. I've waited nearly four nears for the price of blue lasers to come down far enough that I could buy one with a clear conscience, and at 22 bucks total, this one was a bargain.
The color is just what I wanted: cornflower / sapphire blue, not violet / purple like lasers with a wavelength of 405 nm. As I had expected from reading reviews of multiple blue-laser (~450 nm range) devices, the beam is invisible in clear air under most conditions (like the beams of most red lasers, but unlike those of most green ones). It is brighter than the reviews had led me to expect, easily bright enough for classroom use.
The only flaw that I perceive is a trivial one: the dot isn't perfectly circular, but slightly oblong / elliptical. According to the reviews that I've read, this is not uncommon among blue laser pointers. I do not find the elliptical nature of the dot to be noticeable at any range that would be relevant to my use of the device in a classroom setting.