4 results about "Optical photon" patented technology

A method of improving a generated image obtained from a gamma camera for medical imaging, the image being improved by excluding the contribution of low-energy and scattered gamma rays to the generated image, the method comprising the steps of: detecting gamma ray photons by the gamma camera; converting the detected gamma ray photons into one or more optical photons; detecting the resulting optical photons on the photosensitive surface; processing the detected optical photons into a primary data array comprising pixels, where the pixels map the detection of the optical photons on the photosensitive surface, where the filling pixels correspond to the detection of the optical photons on the photosensitive surface; identifying a cluster of padding pixels in the primary data array; determining a density of fill pixels in the identified clusters; classifying the clusters into high-density clusters (clusters with high-density filled pixels) and low-density clusters (clusters with low-density filled pixels); the contributions of low-density clusters to the generated image are excluded, the low-density clusters corresponding to low-energy and scattered gamma rays.

Microwave-optical interface apparatus and methods are disclosed. In one example embodiment, a microwave-optical interface apparatus comprises: a microwave cavity operable to, at least, host at least one microwave signal photon; and an optical cavity comprising a plurality of embedded defects, the optical cavity operable to, at least, host at least one optical signal photon and at least one optical pump electric field, the optical cavity positioned relative to the microwave cavity to cause, using the plurality of embedded defects and induced by the at least one optical pump electric field, three-wave mixing magneto-optic transduction between the at least one microwave signal photon, the at least one optical signal photon and the at least one optical pump electric field within the optical cavity; wherein the at least one optical signal photon and the at least one optical pump electric field are evanescently confined within the optical cavity in at least two dimensions.

A microwave-optical interface apparatus and method are disclosed. In one example embodiment, a microwave-optical interface device comprises: a microwave cavity operable to receive at least one microwave signal photon; and an optical cavity comprising a plurality of embedded defects, the optical cavity operable to receive at least at least one optical signal photon and at least one optical pump electric field, the optical cavity positioned relative to the microwave cavity, to cause a three-wave mixing magneto-optical transduction between the at least one microwave signal photon, the at least one optical signal photon, and the at least one optical pump electric field within the optical cavity using the plurality of embedded defects and induced by the at least one optical pump electric field; wherein the at least one optical signal photon and the at least one optical pump electric field are evanescently confined within the optical cavity in at least two dimensions.