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Here's a few pictures of a 20mW yellow in operation:
http://store.oemlasersystems.com/index.php?main_page=product_info&cPath=6_53&products_id=332darklandz said:that looks amazing!!
whats the retail on one of those?
Jimmymcjimthejim said:Can I have one as a review unit?
brtaman said:I completely agree on the part of limited thermal cooling available in portable lasers (very cool as novelties though). You can have all the TEC power you want, what matters is removing the built up heat from the hot side, this can be done passively through mass as you mentioned or actively (I always used a copper block attached to 1/2 inch tubing cooled by water rushing through a huge copper radiator, even with this system water heat build-up was an issue without actively cooling the radiator with huge fans, though it was a 226w pelt). Like the Wicked Lasers Spyder II, with a TEC being one of its main features, the lack of mass means that not only is it not stable it heats up faster than it would without the TEC.
In a way its somewhat surprising that higher power portables (excluding hercules), have not adopted some sort of fan based cooling system to aid the tec. Fans can be found in extremely small packages and due to their brushless design would not be to big of a drain on the power source. This sort of system would not be that hard to implement into a laser, while it could potentially decrease weight. With active cooling the amount of mass needed would go down drastically. Looking at PCs for instance a CPU with 35w thermal specs needs a tiny ammount of actively cooled alu or cu to run within its parameters.
BTW: What was the pump diodes output in that laser, I am really interested how much 808 it takes to produce that much yellow. Oh and the 50mw is mighty impressive!
Thanks
brtaman