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Great Scott! Canon Patents Transparent Aluminum!

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MarshallG

MarshallG

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If we are to believe Canon Rumors:m, Canon has filed a patent for transparent aluminum. Could it be that a visit from Mr. Scott is the real reason behind Canon's success?

"We continuously see new patents for diffractive optics lenses, something Canon continues to work and that we’ll see in a new EF 600mm f/4 DO IS sometime in the future (Photokina 2018 perhaps?).

This latest patent selectively uses aluminum to reduce light scattering or flare in diffractive lens elements.

Keith at Northlight Images, who is far better at reading patents than I explains:
Member said:
Aluminium is deposited onto the diffractive element at an angle, so as to build up a denser layer on the grating walls (blue) than the front surface (yellow). The aluminium layer is then partially oxidised, converting the front surface coating to a transparent layer of alumina (Al2O3)

Light going (‘the wrong way’) through the grating walls is a major contributor to flare, and in the patent, a test example reduced this by 8 times.
Click to expand...
Read more: http://www.canonrumors.com/patent-using-aluminum-to-reduce-flare-in-do-lens-elements/#ixzz4dZkb4NdH
 
Nothing new: the so-called "sapphire glass" is aluminum oxide, Al2O3. I've been calling it "transparent aluminum" for years.

--
Smaller lenses, better in low light, more telephoto reach:
you can have any _two_ at one time.
 
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They don't all make it into commercial products, but Canon prides itself on being granted lots of patents.

Loading…

www.usa.canon.com
 
Killjoy!
 
Transpatent aluminum sounds actually more "unreal" than sapphire glas. Sapphire glass on the other hand jist sounds very expensive :)
 
And I was expecting Kirk and Spock to save the Whales too.
 
What would be really exciting and world-changing would be if somebody would make drink cans out of this transparent aluminium. Just imagine - drinking out of a receptacle through which you can actually see the liquid you're consuming !!! whoa!! mindblowing!!

or failing that, airliner fuselages.
 
whakapu said:
What would be really exciting and world-changing would be if somebody would make drink cans out of this transparent aluminium. Just imagine - drinking out of a receptacle through which you can actually see the liquid you're consuming !!! whoa!! mindblowing!!

or failing that, airliner fuselages.
Click to expand...
You might think "no that looks awful!"
 
whakapu said:
Just imagine - drinking out of a receptacle through which you can actually see the liquid you're consuming !!! whoa!! mindblowing!!
Click to expand...
Didn't they use to call those things BOTTLES?
 
Yeah. That's what they call em :)
 
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