A system for producing radiation diffractive material

摘要

The specification relates to a system for producing radiation diffractive material comprising: a substrate for receiving a dispersion of core-shell particles that form an ordered periodic array, the shells being swellable and substantially nonfilm-forming; a matrix delivery device for coating the array with a matrix composition; a radiation source(which may be a radiation source emitting visible light) for illuminating the coated array; a radiation detector(which may be a spectrograph) for measuring the spectrum of radiation diffracted by the coated array prior to curing components in the coated array; a control system for adjusting the wavelength of diffracted radiation based on the measured spectrum of radiation diffracted by the coated array; and a curing system for curing components in the coated array and fixing the relative positions of the particles, wherein the control system correlates the measured spectrum of light diffracted by the coated array with a desired appearance of the cured array and may optionally include a system for removing the cured array from the substrate(which may also alter the diameter of the particles in the array.