Toronto, Canada
Toronto, Canada

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Patent
Opalux Incorporated | Date: 2015-01-29

A print on-demand color shift material which has high reflection, high saturation color and intrinsic, high impact color-shift produced by thermal printing or laser writing for use, for example in security laminates, tax and excise stamps, machine-readable features and banknote foils, and offering a rainbow of colors with full color shifting, producible in full manufacturing scale.


Bonifacio L.D.,University of Toronto | Ozin G.A.,University of Toronto | Arsenault A.C.,Opalux Incorporated
Small | Year: 2011

Smelling with photonic color is a simple and cost-effective method to tackle sensing problems of great practical relevance, including water-quality analysis and monitoring of high-value foods such as fish and meat. New methods for the selection of statistically relevant, multivariate information can enhance results and bring real applications closer to practice. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Patent
Opalux Incorporated | Date: 2010-02-25

A temperature-responsive photonic crystal device comprising having a temperature-responsive photonic crystal material, whereby exposure of the device to a temperature above a predetermined threshold temperature is indicated by a detectable change in the device.


Methods and systems for thermal printing of thermally printable photonic crystal materials and assemblies. The photonic crystal materials and assemblies are responsive to thermal stimuli, wherein temperatures above a thermal threshold results in an optically detectable change in the appearance of the materials and assemblies. Heat is selectively applied to one or more portions of the materials and assemblies, in order to thermally print a graphic onto the materials and assemblies.


Patent
Opalux Incorporated | Date: 2013-09-25

A tunable photonic crystal device comprising: alternating layers of a first material and a second material, the alternating layers comprising a responsive material, the responsive material being responsive to an external stimulus, the alternating layers having a periodic difference in refractive indices giving rise to a first reflected wavelength; wherein, in response to the external stimulus, a change in the responsive material results in a reflected wavelength of the device shifting from the first reflected wavelength to a second reflected wavelength.


Patent
Opalux Incorporated | Date: 2010-10-06

The present disclosure provides methods, systems and devices for a photonic crystal combinatorial sensor. The photonic crystal sensor may include an array of photonic crystal materials, wherein each photonic crystal material has a reflected wavelength in a respective initial wavelength range. At least one a first one of the photonic crystal materials may be configured to have a response to an external stimulus different from at least a second one of the photonic crystal materials, the different response resulting in a change in the reflected wavelength of the first photonic crystal material that is an optically detectable difference from the second photonic crystal material. The optically detectable difference may provide an optically detectable response pattern of reflected wavelengths in the array. The sensor may be reversible and reusable.


Patent
Opalux Incorporated | Date: 2011-12-14

A photonic crystal device including a photonic crystal material and an activation surface. The photonic crystal material exhibits a first reflectance spectrum in an unactivated state, and, in response to mechanical stimulation, exhibits a second reflectance spectrum in an activated state. Application of a force at an activation portion of the activation surface offset from a material-supporting portion of the activation surface causes a deformation of the photonic crystal material sufficient to bring the photonic crystal material to the activated state.


Patent
Opalux Incorporated | Date: 2012-01-25

A photonic crystal device including a photonic crystal material and an infiltrating component. The photonic crystal material has an initial reflectance spectrum. An external stimulus causes the infiltrating component to migrate into or out of at least a portion of the photonic crystal material. The migration of the infiltrating component causes a change of at least the portion of the photonic crystal material to shift to a second reflectance spectrum.


Patent
Opalux Incorporated | Date: 2010-11-12

A photonic crystal incandescent light source comprising: a photonic crystal having a structure configured to reflect wavelengths from at least a portion of an infrared spectrum; and an incandescent central filament in the photonic crystal, causing the photonic crystal to transmit wavelengths from at least a portion of a visible spectrum; wherein the light source emits at least a portion of visible wavelengths and suppresses emission of at least a portion of infrared wavelengths.


Patent
Opalux Incorporated | Date: 2011-11-10

A light-scattering photonic material is disclosed having a matrix defining a plurality of disordered voids. The material may be reversibly responsive to an external stimulus, exhibiting reversible first and second optical effects. The material may be a thin film material.

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