Old 08-11-2016, 05:29 PM #1
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Default Inside Infrared BU38 808nm 300mw Laser Diode

Inside infrared laser BU38 808nm 300mw

Edit: Here's a direct link https://youtu.be/8iTq6ZiDoxE



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Old 08-11-2016, 05:45 PM #2
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Default Re: Inside Infrared BU38 808nm 300mw Laser Diode

Awesome! High-res closeups of diodes are always good - don't often get video though!
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Old 08-11-2016, 10:51 PM #3
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Default Re: Inside Infrared BU38 808nm 300mw Laser Diode

Subscribe. I can't get the video right now, for some reason.
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Old 08-12-2016, 01:11 PM #4
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Default Re: Inside Infrared BU38 808nm 300mw Laser Diode

I can't get videos either, they are all black boxes, I PM Ears and Eggs and he is working on it, it's on LPF's end.
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Old 08-12-2016, 03:17 PM #5
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Default Re: Inside Infrared BU38 808nm 300mw Laser Diode

Strange, it seems to be working for me, maybe it's been fixed? Nice video, Alaskan, thanks!
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Old 08-12-2016, 05:05 PM #6
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Default Re: Inside Infrared BU38 808nm 300mw Laser Diode

It works on my note 4 IF I use mobile mode and not desktop.
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Old 08-12-2016, 06:26 PM #7
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Default Re: Inside Infrared BU38 808nm 300mw Laser Diode

Still not available on my laptop.
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Old 08-12-2016, 07:19 PM #8
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Default Re: Inside Infrared BU38 808nm 300mw Laser Diode

Hmmm, I know you keep having trouble with my pics too while others are telling me they appear just a little over 800x600 so there has to be some setting or maybe your browser that is causing the issue. I really can't figure anything more on my end until I'm back home which won't be until the beginning of next week.

On a different note, I can't understand why my 4W c-mount 808nm build doesn't show a red dot at all. I've never seen an 808nm (unless it was really low output) where I didn't see that dot.
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Old 08-12-2016, 07:22 PM #9
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Default Re: Inside Infrared BU38 808nm 300mw Laser Diode

Black box for me, no videos however if I go to you tube all is well.

I have windows 10 on this machine and I checked on another machine running windows 7 and no videos, I have half a dozen computers, I will check them all after lunch including one that runs Ubuntu.

What are you running BowtieGuy? Don't tell me a 572 LOL

-----edit-----

I see this pic, I see all pics just not videos.

Attached Thumbnails
Inside Infrared BU38 808nm 300mw Laser Diode-1955-buick-roadmaster-jay-leno-572-crate-motor-1920x1440.jpg  
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Old 08-12-2016, 08:42 PM #10
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Default Re: Inside Infrared BU38 808nm 300mw Laser Diode

I believe I have solved my pics showing up at 4k instead of 800x600 in places (take a look at my 07E thread and they should all be good now). It's going to take a lot of pain in the butt work to fix all the others in other threads though.
Using my daughters windows 10 laptop all I see is a black window like others are saying.
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Old 08-13-2016, 03:32 AM #11
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Default Re: Inside Infrared BU38 808nm 300mw Laser Diode

Here's a direct link https://youtu.be/8iTq6ZiDoxE
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Old 08-13-2016, 11:12 PM #12
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Default Re: Inside Infrared BU38 808nm 300mw Laser Diode

@ Alaskan: Yes until it's fixed we should just include the address string too.
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Old 08-17-2016, 05:27 PM #13
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Default Re: Inside Infrared BU38 808nm 300mw Laser Diode

https://youtu.be/-fSqFWcb4rE



Edit: adding this short video on how laser diodes work https://youtu.be/FAc5bXX4qog
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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

RHD's Calc: http://lsrtools.1apps.com/RelativeBr...&useRaleigh=on

High Current Pulse Drivers: https://tinyurl.com/ya7whuk3

Last edited by Alaskan; 08-19-2016 at 07:03 PM.
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