Hi, I am building a laser engraver and due to my mechanical ineptitude my base is somewhat wobbly, to get around this I need to use a very small working distance of ~ 1cm.
I'm hoping to use a 445nm 2 watt laser (DTR's 2W M140 445nm). However, I am a bit stumped on the optics. I was hoping to go for a 405-G-2 Glass Lens with an EFL of ~4mm.
However, I'm guessing this focal range is assuming that the laser beam is collimated. I plan to use laser.
I don't know much about optics. I know diode lasers have really bad outputs, but if I go ahead and assume that the beam is collimated and leave it as is... how terrible would the spot be? I was hoping for a spot that is on the order of .1mm (or less).
am I SOL?
I'm hoping to use a 445nm 2 watt laser (DTR's 2W M140 445nm). However, I am a bit stumped on the optics. I was hoping to go for a 405-G-2 Glass Lens with an EFL of ~4mm.
However, I'm guessing this focal range is assuming that the laser beam is collimated. I plan to use laser.
I don't know much about optics. I know diode lasers have really bad outputs, but if I go ahead and assume that the beam is collimated and leave it as is... how terrible would the spot be? I was hoping for a spot that is on the order of .1mm (or less).
am I SOL?