Alaskan
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Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please
Thread added another page, so I'm quoting myself so this makes sense to someone else who just clicks on last post:
OK, to get rid of red-infrared and allow only blue, and act as a 1/4 wave retarder too. Thanks
Thread added another page, so I'm quoting myself so this makes sense to someone else who just clicks on last post:
HR coated 1/4 wave plate anyone? No clue on the wavelength or why it would be HR coated, I thought wave plates were always a through-device.
Laser Optics Quarter-Wave Plate 13x29mm HR Coated | eBay
It's HR coated for red to infrared and passes the blue wavelengths. It would work for 488nm argon holography as well as other things.
OK, to get rid of red-infrared and allow only blue, and act as a 1/4 wave retarder too. Thanks