A Visual Indication of Environmental Humidity Using a Colour Changing Hologram Recorded in a Self-developing Photopolymer

Authors

Izabela Naydenova, Technological University DublinFollow
Raghavendra Jallapuram, Technological University of DublinFollow
Vincent Toal, Technological University of DublinFollow
Suzanne Martin, Technological University of DublinFollow

Document Type

Article

Rights

Available under a Creative Commons Attribution Non-Commercial Share Alike 4.0 International Licence

Disciplines

1. NATURAL SCIENCES, 1.3 PHYSICAL SCIENCES, Optics

Publication Details

Applied Physics Letters Available from http://apl.aip.org/

Abstract

A reflection hologram for visual indication of environmental humidity has been studied. The hologram is recorded in a self-developing photopolymer and changes colour when exposed to a change in humidity and is fully reversible. The range of colour change, reversibility and the response time of the hologram have been studied in a controlled humidity environment. Fully reversible holograms with response times from few seconds to tens of minutes have been designed. Extremely sensitive bright visual humidity indicators, capable of dramatic colour change within a few seconds of breathing on them are demonstrated.

DOI

https://doi.org/10.21427/D72K6Z

Recommended Citation

Naydenova, I., Jallapuram, R., Toal, V., Martin, S. (2008) A Visual Indication of Environmental Humidity Using a Colour Changing Hologram Recorded in a Self-Developing Photopolymer. Applied Physics Letters, 92, 031109. doi:10.21427/D72K6Z

Funder

Enterprise Ireland Technology Commercialisation Fund.