has anyone seen these beam expanders before? the "BEW Series Beam Expanders" look very large?
Beam Expander for green, blue, red DPSS laser.
Beam Expander for green, blue, red DPSS laser.
Thanks, another source for some nice beam expanders, but don't let the input aperture fool you, they show fairly large expansion factors together with large input diameters which at the stated X are greater than the diameter of the output lens will allow. i.e. 17x at 5 mm input with a 25 mm diameter output lens aperture. That won't work, for that to produce 17X the output lens would be more than three inches, probably closer to four inches diameter to have that much expansion, they show 1 inch output aperture diameter.
Most of the output lens diameters don't match the expansion factor at their stated input apertures. What they are showing are probably the input lens diameters, not the input clear aperture at the expansion factor. This is how Laserlands got me bad, I bought a "20x" expander from them which they said could take up to a 2 mm input beam, nope! 1 mm max clear input aperture, it was really a 10x because the output lens wasn't the 40 mm diameter they told me it was, it was closer to 25 mm. Never mind there wasn't enough adjustment thread to reach infinity focus too.
Good morning
Whether this particular beam expander will be suitable for your needs depends also on the diameter of your beam.
In case you have more questions please let us know.
Have a nice day,
Jonas Kniūkšta
STANDA UAB
Thanks, another source for some nice beam expanders, but don't let the input aperture fool you, they show fairly large expansion factors together with large input diameters which at the stated X are greater than the diameter of the output lens will allow. i.e. 17x at 5 mm input with a 25 mm diameter output lens aperture. That won't work, for that to produce 17X the output lens would be more than three inches, probably closer to four inches diameter to have that much expansion, they show 1 inch output aperture diameter.
Most of the output lens diameters don't match the expansion factor at their stated input apertures. What they are showing are probably the input lens diameters, not the input clear aperture at the expansion factor. This is how Laserlands got me bad, I bought a "20x" expander from them which they said could take up to a 2 mm input beam, nope! 1 mm max clear input aperture, it was really a 10x because the output lens wasn't the 40 mm diameter they told me it was, it was closer to 25 mm. Never mind there wasn't enough adjustment thread to reach infinity focus too.
Linos beam expanders seem to come up often for good prices on eBay --everyone seems to like them
There are a lot of them at the moment on eBay and several other makes also see: https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2380057.m570.l1313.TR0.TRC0.H0.Xlinos+beam+expander.TRS0&_nkw=linos+beam+expander&_sacat=0