Photonic Bandgap Structures for Multispectral Imaging Devices

摘要

The invention discloses methods for making photonic bandgap structures and photonic bandgap structures made by those processes. In one embodiment, the photonic bandgap structure is flexible. In another photonic bandgap structure, the structure has a graded, periodic grating. One embodiment of a method according to the present invention comprises the steps of preparing a pre-polymer mixture, positioning that mixture between two slides, exposing the mixture to electromagnetic radiation, curing the mixture, and discarding at least one of the slides. In another embodiment of the method, the pre-polymer mixture is exposed to the electromagnetic radiation through a prism. In one embodiment of the method, the pre-polymer mixture is exposed to the electromagnetic radiation through a lens.;In one embodiment of the invention, the photonic bandgap structure is used as a filter in a multispectral imaging device comprising a imaging device, the filter, a processor, and an electronic image storage device.

主权项

1. A method of making a photonic bandgap structure, the method comprising the steps of:
preparing a photosensitive pre-polymer mixture comprising at least one monomer, at least one photoinitiator, at least one co-initiator, at least one liquid crystal, at least one reactive solvent, and at least one non-reactive solvent; disposing the pre-polymer mixture between a first slide and a second slide; attaching a prism to the first slide; exposing the pre-polymer mixture to electromagnetic radiation having a spatial interference pattern, the pattern created by passing one or more collimated laser beams through the prism; curing the mixture; and discarding at least one of the first or second slides, wherein photo-polymerization occurs in selected regions of the spatial interference pattern to make a photonic bandgap structure in the cured mixture.