I was reading this thread http://laserpointerforums.com/f45/1-...ild-98289.html
dden bought a G7 lens to replace a G2 lens only to find out that his 520nm laser build was just barely able to accommodate this new lens, coming up almost to short in host length. What they didn't know to take into account is the focal length of this lens. Here's what he should have known. Using a single lens to collimate a diode needs to be a distance from the diode equal to a lenses focal length. Keep that in mind when building a laser or swapping for a new lens..
dden bought a G7 lens to replace a G2 lens only to find out that his 520nm laser build was just barely able to accommodate this new lens, coming up almost to short in host length. What they didn't know to take into account is the focal length of this lens. Here's what he should have known. Using a single lens to collimate a diode needs to be a distance from the diode equal to a lenses focal length. Keep that in mind when building a laser or swapping for a new lens..