lazerov
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- Sep 21, 2009
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I'm working on a portable RGV build. One of the goals is to power all three laser modules by single Li-ion 3,7V battery (18650). This is the red laser module I'm going to use in it. It's a LPC-815 LOC diode, pressed in a custom machined aluminium heatsink, driven by low voltage drop linear driver. The lens is the one found in the LPC-815 sled (so it's free).
Picture of the experimental measurement setup (I know it looks bad ):
The driver used can easily provide 0,41A to the diode at only 3,6V. It can supply much more but I don't want to push the diode so far. Current remains stable at higher voltage.
Picture of the driver used:
This is a modified driver from the cheap "50mW" 2xAA green laser Focalprice sells. I changed the resistor from 1Ohm to 0,5Ohm (the big black resistor). A driver with the same design and different component values can be found in the green modules available on DX (here). Their driver can be used with no modification at all.
This module can light matches and cut black tape without focusing. Beam diameter at aperture is ~2mm. Divergence is not great, though, and the "wings" around the dot are quite big.
The violet module in the RGV build is going to use same heatsink, lens from the PHR sled and O-like BR LD driver. With these lenses I should have matching beam diameters of all three colours (the green module has 2mm thick beam).
Picture of the experimental measurement setup (I know it looks bad ):
The driver used can easily provide 0,41A to the diode at only 3,6V. It can supply much more but I don't want to push the diode so far. Current remains stable at higher voltage.
Picture of the driver used:
This is a modified driver from the cheap "50mW" 2xAA green laser Focalprice sells. I changed the resistor from 1Ohm to 0,5Ohm (the big black resistor). A driver with the same design and different component values can be found in the green modules available on DX (here). Their driver can be used with no modification at all.
This module can light matches and cut black tape without focusing. Beam diameter at aperture is ~2mm. Divergence is not great, though, and the "wings" around the dot are quite big.
The violet module in the RGV build is going to use same heatsink, lens from the PHR sled and O-like BR LD driver. With these lenses I should have matching beam diameters of all three colours (the green module has 2mm thick beam).