Old 11-02-2015, 04:46 AM #81
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Default Re: Post your pics of hosts awaiting a build

Looking good Alaskan.


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Old 11-02-2015, 05:26 AM #82
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Default Re: Post your pics of hosts awaiting a build

Thanks, but it's all Ehgemus work, he designed every bit of how it looks, I just asked for the number of 32650 batteries, a higher current switch and a four inch long tube. Here are some more photo's of it, I can't wait for him to finish the inner aluminum tube which will hold the lens that will slide in and out for telescoping focus and to get it in my chilly Alaskan hands.

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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

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

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Last edited by Alaskan; 11-02-2015 at 05:55 AM.
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Old 11-02-2015, 08:53 AM #83
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Default Re: Post your pics of hosts awaiting a build

Alaskan wow, yes Ehgemus did the host but you are the other half of this creation. You are great with lenses and just being able to comunicate with someone online to do what you need is a gift in its self. You both have great chemistry "lots of possibilitys " Im curious as to what Ehgemus has for machinery? Those focus threads are sweet.
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Old 11-02-2015, 03:07 PM #84
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Default Re: Post your pics of hosts awaiting a build

Thanks, I really don't have a college level understanding of optics, but I keep trying to understand them and apply the findings to my hosts. My expanders aren't anything more than rough seat of my pants creations using lenses i find on ebay, none of the beams have correction to even the size of the slow axis to match the fast which without it produces a rectangle output beam instead of a spot, but I'm going to try that soon. I recently asked Ehgemus what his mill setup is, no answer yet. He did a fine job on those threads, wish I had a video showing how he makes these.

Last edited by Alaskan; 11-03-2015 at 03:39 AM. Reason: to make the text flow better
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