This is a slightly different take on a quad 660nm module i made in a week using scrap metal.

Each diode is running at 250mw so im getting a total of 1watt. Each diode is insulated from the aluminium block and there are two diodes per driver.

IM using roithner h7020 lens and telescopics from Edmund optics.

Im getting a final out put beam of 2mm by 3mm @ 1mR

My rebuilt quad -