Side-scan infrared imaging devices
Infrared imaging devices are provided which are configured to implement side-scan infrared imaging for, e.g., medical applications. For example, an imaging device includes a ring-shaped detector element comprising a circular array of infrared detectors configured to detect thermal infrared radiation, and a focusing element configured to focus incident infrared radiation towards the circular array of infrared detectors. The imaging device can be an ingestible imaging device (e.g., swallowable camera) or the imaging device can be implemented as part of an endoscope device, for example.
1. An imaging device, comprising:
a planar substrate comprising circuitry;
a ring-shaped detector element disposed on a surface of the planar substrate, the ring-shaped detector element comprising a circular array of infrared detectors configured to detect thermal infrared radiation, wherein the infrared detectors are disposed normal to the surface of the planar substrate and face in a radially outward direction from a center of the ring-shaped detector element, and wherein the ring-shaped detector element comprises interconnect structures to electrically connect the infrared detectors to the circuitry of the planar substrate; and
a ring-shaped focusing element concentrically disposed around the ring-shaped detector element and configured to direct focused incident infrared radiation towards the circular array of infrared detectors;
wherein the circuitry is configured to receive and process data generated by the infrared detectors to generate an image.
2. The imaging device of claim 1 , wherein the ring-shaped focusing element comprises a plurality of pinholes configured to allow focused incident infrared energy to pass through the ring-shaped focusing element towards the infrared detectors.
3. The imaging device of claim 2 , wherein each infrared detector is aligned to only one pinhole.
4. The imaging device of claim 2 , wherein each infrared detector is aligned to two or more of the plurality of pinholes.
5. The imaging device of claim 1 , wherein the imaging device is an ingestible imaging device.
6. The imaging device of claim 1 , wherein the imaging device is an endoscope.
7. The imaging device of claim 1 , wherein the circular array of infrared detectors comprises a first circular array of infrared detectors and a second circular array of infrared detectors disposed adjacent to the first circular array of infrared detectors.
8. The imaging device of claim 7 , wherein the infrared detectors of the first circular array of infrared detectors are offset from the infrared detectors of the second circular array of infrared detectors.
9. The imaging device of claim 8 , wherein the infrared detectors of the first circular array of infrared detectors are offset from the second circular array of infrared detectors by about ⅓ or about ½ of an area of the infrared detectors.
10. The imaging device of claim 1 , further comprising a circular array of visible light detectors disposed adjacent to the circular array of infrared detectors.