Anamorphic Prism Pair, good for 635nm?

[Alaskan]

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?

 

[Cyparagon]

IR optics will work just fine for red, just possibly have slightly higher losses. It depends on the coatings.

 

[Alaskan]

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?

 

[Bionic-Badger]

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.

 

[Alaskan]

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.