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Showing 1 of 17 conversations about:
fourbyfive
20
Feb 19, 2019
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This is a rather odd offering I must say. If memory serves, a 1 watt krypton generates so much heat that it requires liquid cooling and chillers to operate continuous . 2.5 watts at 445nm would run hot as well. Is this listing a typo? I think CDRH certification would be necessary to fire this up legally, but maybe times have changed. *If* this unit were placed in a housing with all the mandated safety shutoffs it could be used safely. Otherwise, this would be a dangerous toy to have sitting around. Here’s a thought, those safety glasses don’t look near strong enough to stop a 2.5 watt beam, unless doped with some pretty exotic coatings, which would costs hundreds.
Question: Is this a single line emitter or multi-line? If multi-line it could be integrated into a laser light show along with a separate red beam (HeNe). A proper beam splitter would be necessary. Frankly I have never seen this much power for such a small price. Also, I don’t see all the safety warnings and lock-outs normally seen on high powered lasers for sale. I’m curious as to how this could be legally imported in the form shown above. I’ll sign up, but only if multi- line. That’s a whole lot of blue for $75, and I could have a ball with some hi frequency galvos.
OrangeShadow
215
May 1, 2019
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fourbyfiveIsn't Krypton laser basically a vacuum tube? No wonder it produces a lot of heat. That's like comparing a 1 W incandescent bulb with LED of the same light output. Semiconductor laser will produce far less heat.
fourbyfive
20
May 6, 2019
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OrangeShadowOrange Shadow. Lasers employ many different cavities to produce coherent light. Yes, solid state cavities generate less heat than gas tubes, generally speaking. Heat produced in the cavity has no bearing on heat produced by the beam. Beam energy (joules usually) is determined by wavelength, frequency density, doping, and target substrate among other factors. That’s why I asked if this is a single frequency or a multi-line emitter. This can be crudely tested by firing the beam through a coated prism. If multi-line it will be a higher energy beam. Being solid state, and inexpensive, it is probably single line. A characteristic of many solid state lasers is invisible spurious emissions, some of which can damage vision. Above certain power levels CDRH mandates full optical enclosure of a laser system. So how many one-eyed jacks does it take to turn off the laser?
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