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well i had a few dollars spare to test out the claims of suppliers on aliexpress. this example is pathetic and comes from china fantasy, an apt name seeing that all of its claims are nothing but fantasy. i raised a dispute with aliexpress to try and deny china fantasy that hard earned 20 bucks...

ok, starting this thread as a journal. first test is a block of styrofoam housing a 0.5 gram aluminium sheet blackened with marker pen. an aperture at the front and back allows laser to enter and hit the sheet, and a infrared thermometer secured to the rear to record temperature change over a...

hi, im new to playing with high power lasers, in fact i only recently found out laser tech has got tthis far. i just bought a 200mw green and 1000mw blue and the first thing i noticed exept for the power is that the dot shape and collimation on the green is far better (true dot) than the blue...