Old 11-28-2014, 11:52 AM #1
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Default anyone remember the liquid fan DG at novalasers ?

i am so much interested at that diffraction grating but cant find anywhere. you know a similar one being sold anywhere ? thanks and regards.


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Old 11-29-2014, 04:44 AM #2
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Default Re: anyone remember the liquid fan DG at novalasers ?

OK, I googled trying to find what this is about and can't find it yet, what is a liquid fan?

I can find lots of diffraction gratings on ebay, but not sure what you are after:

http://www.ebay.com/sch/i.html?_from...ating&_sacat=0
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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

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; 11-29-2014 at 04:46 AM.
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Old 11-29-2014, 06:10 AM #3
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Default Re: anyone remember the liquid fan DG at novalasers ?

that effect is derived from a high speed rotating polygon multifaceted mirror on one axis, with a laser bouncing off it
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Old 11-29-2014, 06:26 AM #4
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Default Re: anyone remember the liquid fan DG at novalasers ?

Is that you Tony? Is your avatar showing it?
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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
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Old 11-29-2014, 08:47 AM #5
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Default Re: anyone remember the liquid fan DG at novalasers ?

Quote:
Originally Posted by Laser Project View Post
OK, I googled trying to find what this is about and can't find it yet, what is a liquid fan?

I can find lots of diffraction gratings on ebay, but not sure what you are after:

diffraction grating | eBay
thanks so much for the help laser project, liquid fan DG at nova was like many laser line beams on a single line. i wish i told what i am trying to tell that is the best effect i have ever seen. was perfect with green lasers, but i lost it
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Old 11-29-2014, 04:13 PM #6
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Default Re: anyone remember the liquid fan DG at novalasers ?

Quote:
Originally Posted by laserdonkey View Post
thanks so much for the help laser project, liquid fan DG at nova was like many laser line beams on a single line. i wish i told what i am trying to tell that is the best effect i have ever seen. was perfect with green lasers, but i lost it
Maybe draw it instead of trying to explain it?

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Old 11-29-2014, 05:11 PM #7
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Default Re: anyone remember the liquid fan DG at novalasers ?

https://www.youtube.com/watch?v=AAN0xX1WJTg

Maybe the one around 11 seconds in?
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Old 11-29-2014, 08:59 PM #8
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Default Re: anyone remember the liquid fan DG at novalasers ?

I think I understand now, several laser beams all lined up together in a fan-like orientation. I've never seen one like that.
__________________

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
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