Old 02-25-2017, 06:07 PM #1
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Default Complete Newb, project help

Hey Laser enthusiasts! i need some help and my knowledge of electronics is extremely low.

I'm trying to find a laser for some painting projects.

I need a laser that will project a single dot centered, and two rings, one at 12 inches and one at 24 inches. Preferably with US power supply and an on/off switch.

Any help would be greatly appreciated! this would solve 3 weeks of searching for a solution!


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Old 02-25-2017, 06:17 PM #2
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Default Re: Complete Newb, project help

I can offer this much

10pcs Whirl Diffraction Gratings Coated Glass Lens for Laser Stage Lighting | eBay

Not exactly what you are looking for, but putting this in front of a small green laser you can get your point and circle, then move the pointer closer or further away for the second circle. My guess is you don't really need my help on this.
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Attention new brothers of the collimated light!

Newbie advice: Please take the time to first make an introduction in the Welcome section before posting questions.


Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be very roughly ~10% the diameter of the moon or sun at their distances.

Divergence Calculator: pseudonomen137's JScript mRad Calculator - Measure your lasers beam dia. at 1 foot & then 20'.

Online calc. to determine spot intensity at different mRad's & powers: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: Laser Power Density Calculator - Ophir

Build a beam expander to reduce divergence: http://tinyurl.com/BeamExpander

University YAG Project The Professor's Homebuilt Lasers Site - YAG Lasers

YAG Power Calc. Laser Peak Power Calculator - Ophir

Angular Size Calculator; use with diode angle of radiation spec. for lens dia. at FL: Angular Size Calculator

Compare different colors: http://lsrtools.1apps.com/RelativeBr...&useRaleigh=on

High Current Pulse Drivers: https://tinyurl.com/ya7whuk3
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Old 02-25-2017, 06:42 PM #3
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Default Re: Complete Newb, project help

Depending on the angle of defraction/distance the laser needs to be away to get the rings i need, this maybe just what i need!

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Old 02-28-2017, 01:26 AM #4
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Default Re: Complete Newb, project help

Something like this?
https://www.laserglow.com/int-alignment.htm
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