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Old 09-15-2008, 11:35 PM #1
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Default optics for budget scanner

hi everyone. ive built a scanner from scan pro20's on a budget using a DX green labby style module!

now im a llittle bored with it and want red aswell (blue is too expensive at the moment)

what optics do i need to get the green and red working? but remember its on a budget... so nothing eg.200
lol

thanks!


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Old 09-17-2008, 08:12 AM #2
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Default Re: optics for budget scanner

You want to turn it into a RGY?

You just need a dichro and a mirror for that, although the mirror is not so nessicery it just depends on how you prefer to set it up.

All you need is a dichro which simple reflects one colour and lets another pass straight through it. A red laser will pass right through it and the green will reflect for example. You just need to place the lasers so that the beams cross eah other at a 90 degree angle and then place the dichro at a 45 degree angle where the beams meet.

Both red and green lasers turned on with the dichro placed where the beam meets as said above will give you a yellow beam, turning off the green will allow the whole red to pass through and turning the red off and green on will reflect the green.

A note to remember though is the reflected colour needs to be around 3mm away from the passed colour as if it were running paralell to the other beam. That gives the impression of a yellow beam.
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Old 09-18-2008, 08:32 PM #3
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Default Re: optics for budget scanner

edmund optics
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Old 09-18-2008, 08:45 PM #4
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Default Re: optics for budget scanner

i would recommend going with laser wave optics people have reports less loss from them compared to other companies
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Old 09-25-2008, 01:46 PM #5
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Default Re: optics for budget scanner

for combining "only" two lasers, you can use stuff from dvd-sleds too. in detail, the polarising beamsplitting-cube. a 3mm or 5mm cube, you place it exactly as lamborgini wrote. you have to rotate the lasers so the right beam goes through the cube and the other one reflects at an angle. theres much more info about "pbs" cubes, have a look!
well, best option for a budget, i'd say!

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