- Dec 30, 2010
sorry it took so long to respond/ thanks a lot for the help Dave. i'm going to leave it as it is. i bought it more for the beam anyhow. and with the focusing lens it doesn't really matter. thanks againThis is simply your lens focusing the spurious emission from around the edge of the die. We have seen this since the release of the 6X 405nm diodes. These 445nm diodes are built the same way. The front of the die in the diode is rectangular, but the main beam only emits from the center of one spot, on the edge of, the die.
With the "better" (higher output) lenses this "phantom square" is more easily seen, but it is always there. Yours looks like a better lens. There is nothing wrong with this output. If it bothers you, get a lower quality lens. It will reduce both the mW and the brightness of this "phantom square."