How does the diffraction grating in Canadian currency work?

Click For Summary
SUMMARY

The discussion focuses on the creation of diffraction gratings inspired by the Canadian currency's optical features, specifically the transmission diffractive optical element used in the maple leaf design. The user aims to replicate this effect to display initials instead of numbers for a university project. Key technologies mentioned include computer-generated holography and the phase grating concept, which differentiates it from amplitude gratings. Innovia Security is identified as a key player in this technology, providing resources and guides relevant to the project.

PREREQUISITES
  • Understanding of transmission diffractive optical elements
  • Familiarity with computer-generated holography
  • Knowledge of phase grating versus amplitude grating
  • Experience with high-resolution printing techniques (e.g., 600dpi printing)
NEXT STEPS
  • Research the principles of transmission diffractive optical elements
  • Explore computer-generated holography techniques for custom designs
  • Investigate the technologies and resources provided by Innovia Security
  • Learn about high-resolution printing methods and scaling techniques for optical applications
USEFUL FOR

Students in optical engineering, hobbyists in holography, and professionals interested in security features of currency or custom optical designs.

Paddyster
Messages
6
Reaction score
0
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.
 
Science news on Phys.org
Paddyster said:
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
 

Similar threads

Undergrad Why tilting a diffraction grating produces tilted dots
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Do Multiple Diffraction Gratings Affect Interference Patterns?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Umbrella fabric and diffraction pattern
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Photographing diffraction grating interference patterns
  • · Replies 17 ·
Replies
17
Views
3K
Undergrad Single Slit and Diffraction Grating Formulas
  • · Replies 6 ·
Replies
6
Views
9K
Diffraction pattern from a grating
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad How Do Different Diffraction Grating Designs Affect Analysis Results?
  • · Replies 1 ·
Replies
1
Views
1K
High School How to create diffraction gratings from negative film
  • · Replies 7 ·
Replies
7
Views
3K
Undergrad What is diffraction grating and how does it work?
  • · Replies 1 ·
Replies
1
Views
11K
Graduate Fraunhofer diffraction experiment- neural density filters
  • · Replies 7 ·
Replies
7
Views
2K