Re: retroreflector with offset angle?




Boxman wrote:

Check out this patent (US RE40455) for a pretty detailed
explanation of modern retroreflector designs

I believe that this is a reissue of patent number 6767102.

Following through the references, I found patent numbers
3833285 and 4775219, which answer the specific question
of how to make the refector shine more into the driver's
eyes and less into his headlights.

http://patft.uspto.gov/netahtml/PTO/srchnum.htm
http://www.google.com/patents?q=3833285
http://www.google.com/patents?q=4775219

"the groove side angles are chosen so as to form cube-corner
retroreflective elements that concentrate more reflected
light into certain regions of the divergence profile of the
retroreflective article than in other regions."

Figures from above patents:
http://www.google.com/patents?id=Qj40AAAAEBAJ&pg=PA5
http://www.google.com/patents?id=Qj40AAAAEBAJ&pg=PA6
http://www.google.com/patents?id=j-cqAAAAEBAJ&pg=PA4
http://www.google.com/patents?id=J1U0AAAAEBAJ&pg=PA2
http://www.google.com/patents?id=Qj40AAAAEBAJ&pg=PA2

--
Guy Macon
<http://www.GuyMacon.com/>

.

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