CPC G06K 19/0717 (2013.01) [G06K 19/06028 (2013.01); G06K 19/0723 (2013.01)] | 20 Claims |
1. An environmental exposure indicator comprising:
a substrate;
an environmental exposure indicator (“EEI”) material provided on the substrate that is configured to change an optical property between a creation state and an end state;
the environmental exposure indicator material having a deployment state, between the creation state and the end state, at a deployment time; and
digital calibration data based on a measurement of the optical property of the EEI material determined at the deployment state and encoded in an indicium or memory coupled to the substrate,
wherein the digital calibration data is configured to be used to correctly interpret the current state of the EEI material at a time subsequent to the deployment time.
|