I have seen an application online in which a 405nm laser was able to successfully cure a 385nm resin, it was a resin from Bucktown Polymers.
I like the idea of driving the LD with a closed loop power supply, but from what I have seen few of the cheaper diodes out there have a PD in the can. Has anyone seen a project where they succesfully implemented an external PD? I would imagine that I would need to use a beam splitter to divert part of the beam into an external device (photo diode). In one thread on these forums someone mentioned that clear glass mounted at a 45* angle would do, but I would think that the losses would be tremendous, and there would be a fair amount of dangerous laser light being transmitted throughout the room due to the glass not being designed with optics in mind.
I like the idea of driving the LD with a closed loop power supply, but from what I have seen few of the cheaper diodes out there have a PD in the can. Has anyone seen a project where they succesfully implemented an external PD? I would imagine that I would need to use a beam splitter to divert part of the beam into an external device (photo diode). In one thread on these forums someone mentioned that clear glass mounted at a 45* angle would do, but I would think that the losses would be tremendous, and there would be a fair amount of dangerous laser light being transmitted throughout the room due to the glass not being designed with optics in mind.