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Spectral model of a fluorescent ink halftone
1Fashion Institute of Technology, State University of New York, New York 10001, USA. geof@matrixcolor.com
Summary
This study models fluorescent ink halftones, finding that photon scattering and internal reflections significantly increase light absorption. Realistic models must account for these effects for accurate predictions.
Area of Science:
- Optics
- Print Media Technology
- Photonics
Background:
- Fluorescent inks absorb high-energy photons and emit lower-energy photons, unlike nonfluorescent inks.
- Light absorption in fluorescent inks is crucial for determining emitted light intensity.
- Paper substrates and ink layers interact with light, influencing absorption through scattering and reflection.
Purpose of the Study:
- To develop a theoretical model for fluorescent ink halftones.
- To investigate the impact of photon scattering and internal reflections on light absorption.
- To create a realistic model that incorporates these optical phenomena.
Main Methods:
- Utilized the generalized Clapper-Yule theory to model photon diffusion.
- Accounted for photon scattering within the paper substrate.
- Incorporated multiple internal reflections between the ink layer and paper substrate.
Main Results:
- Photon scattering and internal reflections significantly increase light absorption in fluorescent inks on paper.
- Multiple internal reflections alone have a marginal effect on absorption.
- The combined effect of scattering and internal reflection leads to a substantial increase in percent absorption.
Conclusions:
- A theoretical model incorporating scattering and internal reflection is necessary for accurate representation of fluorescent ink halftones.
- The interplay between paper substrate properties and ink characteristics significantly influences optical absorption.
- Further experimental validation is needed to confirm the model's predictions.