Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

LPF Donation via Stripe | LPF Donation - Other Methods

Links below open in new window

ArcticMyst Security by Avery

LD efficiency

Joined
Sep 7, 2008
Messages
396
Points
18
Obviously green modules are far less efficient than red and blue diodes. But is a 405nm diode more efficient than a red? I'm usually seeing numbers on a PHR something like 110mA and 98 mW or so, but on LPCs I usually see something like 400mA and 270mW or so. However, the red diodes are fine around 3 volts, where the PHR needs 5. Mathematically, the red diode seems more efficient (W in vs. W out). Would that be an accurate assessment?
 





Joined
Jun 13, 2007
Messages
5,410
Points
113
For efficiency you would take W out over W in. So if an open can outputs 300mW @ 3V and 420mA you would get 1.26W in, so take .3/1.28 and you get ~24%, where a BR outputting 100mW at 5V and 110mA you would get ~18% efficiency. For true efficiency you have to measure the power without the lens. So at these currents and powers the red would be more efficient, but that could change with current and with different LDs.
 




Top