I How does the diffraction grating in Canadian currency work?

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Hi,
This is my first post so apologies if I'm not clear enough or if I am posting in the wrong place. I am doing my 3rd year project at university and I am creating diffraction gratings. My supervisor shown me a Canadian note and if you shine a laser through the maple leaf it will shine on the other side as the number value associated with the note. I was hoping to produce something similar for my project but for it to emit my initials instead of numbers. Does anybody know how I'd go about this?
Kind regards.
 

Andy Resnick

Science Advisor
Education Advisor
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Hi,
This is my first post so apologies if I'm not clear enough or if I am posting in the wrong place. I am doing my 3rd year project at university and I am creating diffraction gratings. My supervisor shown me a Canadian note and if you shine a laser through the maple leaf it will shine on the other side as the number value associated with the note. I was hoping to produce something similar for my project but for it to emit my initials instead of numbers. Does anybody know how I'd go about this?
Kind regards.
It's a transmission diffractive optical element: because it's a phase grating, not an amplitude grating, you can't (conventionally) print one. The company, Innovia Security, apparently has a whole suite of related technologies:

https://www.innoviasecurity.com/uploads/pdfs/Security-Features-Reference-Guide-EN---Final.pdf
https://cclsecure.com/uploads/pdfs/Specimen-Issue-1-EN-web.pdf
http://demo.icpress.ru/en/demo/countries/47/single_banknote/12004.html
 

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