Old 05-09-2015, 05:19 PM #1
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Default Anamorphic Prism Pair, good for 635nm?

Hello, here's a anamorphic prism pair on ebay, I believe these were taken out of a IR laser but the seller is listing them as a beam expander prism pair for 635nm. Anyone here ever use one of these IR prism sets at 635nm?

High Power 15W Laser Diode Anamorphic Beam Expander Prism Collimator Optic 635nm | eBay

The seller is tcle2745 in La Valle, Wisconsin, anyone here know this seller?


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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

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

High Current Pulse Drivers: https://tinyurl.com/ya7whuk3
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Old 05-09-2015, 05:28 PM #2
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Default Re: Anamorphic Prism Pair, good for 635nm?

IR optics will work just fine for red, just possibly have slightly higher losses. It depends on the coatings.
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Old 05-09-2015, 05:31 PM #3
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Default Re: Anamorphic Prism Pair, good for 635nm?

How about one of these designed for 808nm being used at 1064nm? Any idea if the losses might be worse in that direction for a longer wavelength?
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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 05-10-2015, 01:23 AM #4
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Default Re: Anamorphic Prism Pair, good for 635nm?

If they're like those prism pairs from the B+W DPSS blues, they seemed pretty lossy, especially going through two of them.

You could also check out the prism pair from LaserShowParts, or the equivalent from eBay like these; they're supposedly coated for broadband. The overall price is about the same.
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Old 05-10-2015, 05:05 AM #5
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Default Re: Anamorphic Prism Pair, good for 635nm?

Thanks, appreciate the link, hadn't known about them before.

I have a larger pair of anamorphic lenses here and finding that shooting a less than fully collumated beam into them doesn't work out to make a nice round spot when putting a pcx lens on the other side of the prisms to collimate it, doing so makes a very oblong output, completely reversing what I was trying to use the prisms for, making it worse than it was to begin with

Edit: Of course, if I collimate the beam first prior to the prisms, it works correctly. I was hoping I could shoot a uncollimated beam through it, if close enough to the diode, which I can, but then when trying to collimate the beam after it leaves the prisms it won't do so, all distorted.
__________________

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

Last edited by Alaskan; 05-10-2015 at 05:18 AM.
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