Chinese Mirror and 6W

[polishedball]

Nope that light isn't missing the mirror it is going right through it. opps about 700mw right through it. Seems worse in the lower spectrum Blue, but alittle of everything makes its way through. Add a mirror up top to reflect it forward and it will be like i have dual heads

[dsli_jon]

Nope that light isn't missing the mirror it is going right through it.

You forgot the 'second' "s" in chinese... (hint: it's right after the 'n'..

...Maybe you can pick it off and use it for another lumia-section??
j

[gottaluvlasers]

I have personally measured losses on some "popular" Chinese scanners in the >50% range. ESPECIALLY with 445 and at larger angles.
Shoot 5+W of 445 at a DT mirror and have fun with that also. Makes a GREAT lumia effect. lol...

Chinese scanners= $500
CTS / Eye Magic= $1200+ Hmmm......wonder why??

[planters]

Where did you get these scanners? The waste beam coming out of the scanner appears to be deflected about 10 degrees off the main beam. I don't understand this. Typically the leakage THROUGH the mirror would be at 90 degrees to the reflected beam and parallel to the incident beam. Also at about 40 seconds the blue beam seems to be scanning a wider pattern in the waste beam than in the main beam. Have you tried turning off the scanner and reflecting each color off the two mirrors. Sometimes the peripheral leakage only occurs during scanning when the increased angle of incidence reduces the apparent width of the mirror.

[polishedball]

It is 90. Just the video angle to capture it was. Trying to remember the source of the mirrors. I replaced them as I needed the wides.

Where did you get these scanners? The waste beam coming out of the scanner appears to be deflected about 10 degrees off the main beam. I don't understand this. Typically the leakage THROUGH the mirror would be at 90 degrees to the reflected beam and parallel to the incident beam. Also at about 40 seconds the blue beam seems to be scanning a wider pattern in the waste beam than in the main beam. Have you tried turning off the scanner and reflecting each color off the two mirrors. Sometimes the peripheral leakage only occurs during scanning when the increased angle of incidence reduces the apparent width of the mirror.

[mixedgas]

Just get the ONE STOP dielectric and get it over with. I've blasted it to 10x rated power, and if its clean, it will take it.

Steve

[planters]

Steve,

This brings up an interesting point. Replacing scanner mirrors... really? A scanner set I received from Omar did come with a replacement pair, but I dreaded the occasion where I might need them. They seem so small, precariously mounted and requiring precision alignment while at the same time I wouldn't be surprised that they are expected to survive 1000's of G's. Oh boy!

Any pointers, tutorials or suggestions?

[polishedball]

I've done it twice, both times by eye. They fit in the slot pretty tightly so it just comes down to centering. I shouldn't say how well this has gone as I am about to swap out some mirrors to a size larger on another set. Now I'm sure I just gave myself the kiss of death. Besure to know how to walk and tune your scanners though as the different weight from mirrors or epoxy can effect the tune.

Steve,

This brings up an interesting point. Replacing scanner mirrors... really? A scanner set I received from Omar did come with a replacement pair, but I dreaded the occasion where I might need them. They seem so small, precariously mounted and requiring precision alignment while at the same time I wouldn't be surprised that they are expected to survive 1000's of G's. Oh boy!

Any pointers, tutorials or suggestions?

[dsli_jon]

Any pointers, tutorials or suggestions?

Mr Murphy is right.. it's a bit of a 'tense' few moments whist the epoxy is setting, but, as with many laser-related things (ie: optics cleaning, pre 'first-contact'-era.. , etc..) learning the 'art' is just a matter of practice.. Yes, there are 'jigs' out there, for 6800-style glue-ups, but.. I've always preferred to do it by eye / gentle-touch...

..Acetone-cleaned fingertips (..finger-oils are a definite no-no.), a brief-kiss from a soldering-iron tip to loosen the old mirr, and a good sharp exacto-blade (..for removing all excess epoxy from the shaft-slot...) will get you ready, and a left-over wooden-stick from one of those 'long-reach' cotton-swabs - whittled to a razor needle-point, for gently-depositing *just* the right amount of epoxy in the shaft, to 'base-set' the mir, then later, deftfully 'drawing it', on-sides of the shaft / on the rear, to 'lock' it in, is pretty-much all it 'takes'...

..and ya know, it's a really great way to practice slow-breathing / relaxation techniques... I'm thinking: Yoga / Scanner-mirror Mounting Classes at SELEM, whaddaya think?

Really, the 'hero' is that little 'needle-tip wooden stick', for applying the epoxy in the ever-so conservative, yet ample, way.. Imagine, ya know, for-example, yer 'gluing-up someones cornea after performing a nice radial-K'.. Careful, but 'determinate' werk.. (..Mozart, optional..)

Don't fear the reaper, just go for it..
j

[taggalucci]

You can also use gravity to centre the mirror once the glue has sufficiently cured to hold the mirror to the galvo shaft - i.e. suspend the galvo in a mounting block with the shaft straight down on a level surface.