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Burris XTR get a rain coating. |
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koshkin
MODERATOR Dark Lord of Optics Joined: June/15/2004 Location: United States Status: Offline Points: 13182 |
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Bushnell filed a patent on their rainguard coatings in 2003 (patent #6,542,302). It is reasonably well written, but since everybody and their grandmother have been making hydrophobic coatings for a number of years now, there is nothing preventing other companies from using them. A lot of Bushnell's patent talks about the particular combination of their AR coating and Rainguard (not all hydrophobic coatings work equally well with all AR coatings). It looks like they tried to write a fairly broad patent, but I am not sure whether it is very defensible since I think there was prior art. Either way a simple patent search on hydrophobic glass coatings yield a couple of thousands of hits. It is interesting that apparently during the time when this patent was filed Bushnell's AR coating was only four layers. Most sophisitcated coatings had gone on to higher layer counts by then. I wonder if Bushnell had improved their AR coatings since then. ILya |
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Big Squeeze
Optics Master Extraordinaire GOOGLE NINJA Joined: August/30/2007 Location: Anaheim, Calif. Status: Offline Points: 3143 |
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koshkin
MODERATOR Dark Lord of Optics Joined: June/15/2004 Location: United States Status: Offline Points: 13182 |
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We were typing at the same time.
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koshkin
MODERATOR Dark Lord of Optics Joined: June/15/2004 Location: United States Status: Offline Points: 13182 |
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Forgot to add: Bushnell's formula for their coatings is nicely described in their patent, so working around it is pretty straightforward.
ILya |
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pyro6999
Optics Retard OT TITAN Joined: December/22/2006 Location: North Dakota Status: Offline Points: 22034 |
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i knew you would have something highly intelligent to say! you didnt let me down ilya!
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They call me "Boots"
375H&H Mag: Yeah, it kills stuff "extra dead" 343 we will never forget God Bless Chris Ledoux "good ride cowboy" |
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tahqua
MODERATOR Have You Driven A Ford Lately? Joined: March/27/2006 Location: Michigan, USA Status: Offline Points: 9042 |
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Hell, I couldn't even find it.
Anyways, the stuff works and it didn't stay fogged for long when I breathed on it outside, either.
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pyro6999
Optics Retard OT TITAN Joined: December/22/2006 Location: North Dakota Status: Offline Points: 22034 |
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hmm your crazy doug but i will take your word for it!
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They call me "Boots"
375H&H Mag: Yeah, it kills stuff "extra dead" 343 we will never forget God Bless Chris Ledoux "good ride cowboy" |
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