Abstract: Embodiments of the invention relate to a method and apparatus for imaging. Specific embodiments can incorporate an imaging module having at least one first imager, where each first imager images a corresponding at least one first portion of a ?° field of view about a reference point, such that the at least one first imager images the ?° field of view. In a specific embodiment ? is at least 90°. The imaging module can also incorporate at least one second imager, where each second imager images a corresponding at least one second portion of the ?° field of view about the reference point, and one or more of the at least one first imager has a different magnification than one or more of the at least one second imager. Embodiments can allow imaging of a ?° field of view about a reference point with imagers having at least two different magnifications.

Abstract: Embodiments of the invention relate to a method and apparatus for imaging. Specific embodiments can incorporate an imaging module having at least one first imager, where each first imager images a corresponding at least one first portion of a ?° field of view about a reference point, such that the at least one first imager images the ?° field of view. In a specific embodiment ? is at least 90°. The imaging module can also incorporate at least one second imager, where each second imager images a corresponding at least one second portion of the ?° field of view about the reference point, and one or more of the at least one first imager has a different magnification than one or more of the at least one second imager. Embodiments can allow imaging of a ?° field of view about a reference point with imagers having at least two different magnifications.

Abstract: Embodiments of the invention relate to a method and apparatus for imaging. Specific embodiments can incorporate an imaging module having at least one first imager, where each first imager images a corresponding at least one first portion of a ?° field of view about a reference point, such that the at least one first imager images the ?° field of view. In a specific embodiment ? is at least 90°. The imaging module can also incorporate at least one second imager, where each second imager images a corresponding at least one second portion of the ?° field of view about the reference point, and one or more of the at least one first imager has a different magnification than one or more of the at least one second imager. Embodiments can allow imaging of a ?° field of view about a reference point with imagers having at least two different magnifications.

Abstract: Embodiments of the invention relate to a method and apparatus for imaging. Specific embodiments can incorporate an imaging module having at least one first imager, where each first imager images a corresponding at least one first portion of a ?° field of view abot a reference point, such that the at least one first imager images the ?° field of view. In a specific embodiment ? is at least 90°. The imaging module can also incorporate at least one second imager, where each second imager images a corresponding at least one second portion of the ?° field of view about the reference point, and one or more of the at least one first imager has a different magnification than one or more of the at least one second imager. Embodiments can allow imaging of a 0° field of view about a reference point with imagers having at least two different magnifications.

Abstract: A diagnostic instrument for determining a cardiovascular system parameter. In one embodiment, the instrument takes the form of a portable pulse oximeter comprising a light to frequency converter (LFC) as a sensor. Also provided is a light to frequency converter comprising a photoresistor and capacitor in circuit communication with an inverting Schmitt trigger and configured such that the inverter generates a periodic electrical signal corresponding to the amount of electromagnetic radiation illuminating the photoresistor.

Abstract: A diagnostic instrument for determining a cardiovascular system parameter. In one embodiment, the instrument takes the form of a portable pulse oximeter comprising a light to frequency converter (LFC) as a sensor. Also provided is a light to frequency converter comprising a photoresistor and capacitor in circuit communication with an inverting Schmitt trigger and configured such that the inverter generates a periodic electrical signal corresponding to the amount of electromagnetic radiation illuminating the photoresistor.