Abstract: The present invention is a camera with video-rate acquisition and processing for medical imaging applications. In particular, the invention is used to determine the health of a body area by quantitatively measuring blood oxygen levels and melanin content from a real-time video image of a body segment. In certain embodiments, a camera comprises an objective lens; a filter tray located at an aperture stop of the objective lens, wherein the filter tray comprises a plurality of elements, each element passes a spectral band of light; a micro-lens array located at an exit pupil of the objective lens comprising a plurality of micro lenses to form an image plane, wherein the objective lens produces a focused image at the image plane; and a focal plane array comprising a plurality of sensors, wherein each sensor receives light from at least one micro-lens of the micro-lens array.

Abstract: A spectroradiometer images a scene as a repeating sequence of spectral images, each of which spectral images depicts the scene at a preselected wavelength. In a preferred embodiment, the image is of size 256 by 192 pixels, and the sequence repetition rate is about 20-30 cycles per second. Full spectral analysis on the resulting sequences is performed substantially in real time. The spectroradiometer includes a collector of energy in the X-ray or infrared ranges with a lens, a circularly variable spectral filter, and a gate which gates the output of the filter to a detector array which outputs the sequence of electronic spectral images. These images are corrected for systematic errors and calibrated, and correlated with a preselected spectral response function. The image may be further post-processed and displayed in video format or used otherwise.

Abstract: A compact, portable infrared surface inspection system includes an infrared point energy source having an infrared energy source, an aperture plate having an aperture therethrough, and a pair of 90-degree off-axis parabolic mirrors that focus infrared energy from the infrared energy source to the aperture. A third 90-degree off-axis parabolic mirror receives the infrared energy passing through the aperture, which is located at the focus of the third 90-degree off-axis parabolic mirror, and reflects the infrared energy through a 90-degree angle into a Fourier transform infrared spectrometer having as a infrared energy output an FHR beam. The FFIR beam is optionally filtered and directed into a final mirror array that includes a barrel ellipse mirror assembly which receives the FTIR beam, directs the FTIR beam toward a specimen analysis location at a first focus of the ellipse, and directs a diffuse scattered beam from the specimen analysis location toward a second focus of the ellipse.