We are trying to reduce laser beam spot with a different lens.
Standard 3 element lens
Adding additional semicilindrical lens
Original images where you can measure the actual size
The problem that existing 3 elements, G2, G7 lens only decrease laser spot in one axis but do not decrease in the other. The is why you always see a rectangle and can not make it smaller to round or square.
We add a new flat convex lens.
We setup a flat convex lens on 80 mm range from the laser diode. Closer to the surface.
we added Laser Beam Corrective Cylindrical Mirro set/For High Power 450nm laser Diode
For 405nm-450nm-465nm-473nm High Power Laser Diode’s Beam Collimation and correction.
With AR Coating.
Width reduction：~2 times
200*350 microns final beam spot vs. initial 400*600
this means that the density of the laser spot will be 400*600 / 200*350 = 3.4 times more, therefore, Endurance lasers can be ~3-3.4 times more efficient compared to standard 3 element
New laser lens developing scetch