Embodiments of the present disclosure provide an interrogation device that is operable to apply one or more source signals to one or more coils surrounding a volume, where a material is disposed within the volume. Each of the one or more source signals may excite one of the one or more coils, and the behavior of each the one or more coils responsive to the exciting may be monitored. One or more parameters may be determined based on the behavior of each the one or more coils, and the one or more parameters may be utilized to generate a signature for the material within the volume. The signature may be compared to one or more signatures of known materials to identify the material within the volume.

Embodiments of the present disclosure provide an interrogation device that is operable to apply one or more source signals to one or more coils surrounding a volume, where a material is disposed within the volume. Each of the one or more source signals may excite one of the one or more coils, and the behavior of each the one or more coils responsive to the exciting may be monitored. One or more parameters may be determined based on the behavior of each the one or more coils, and the one or more parameters may be utilized to generate a signature for the material within the volume. The signature may be compared to one or more signatures of known materials to identify the material within the volume.

An ophthalmologic apparatus, includes: a first concave mirror and a second concave mirror having a concave surface-shaped first reflective surface and a concave surface-shaped second reflective surface; an SLO optical system configured to project light from an SLO light source onto a subject's eye via the first concave mirror and the second concave mirror, and to detect returning light from the subject's eye; a first optical scanner configured to deflect the light from the SLO light source to guide the light to the first reflective surface; a second optical scanner configured to deflect light reflected by the first reflective surface to guide the light to the second reflective surface; an OCT optical system including a third optical scanner, and configured to split light from an OCT light source into measurement light and reference light, to project the measurement light deflected by the third optical scanner onto the subject's eye, and to detect interference light between returning light of the measurement light from the subject's eye and the reference light; an optical path coupling member disposed between the first optical scanner and the first concave mirror, and combining an optical path of the SLO optical system and an optical path of the OCT optical system; and a correction unit configured to correct detection result of the interference light detected by the OCT optical system or an image formed based on the detection result.

A sensing unit for use in-body comprises a variable impedance circuit for connection to the distal end of a transmission line and reflecting a carrier signal received from the transmission line. The variable impedance circuit comprises a variable impedance component having an impedance which varies non-linearly with applied voltage, a sensor for generating a voltage in response to a stimulus and a voltage bias system for creating a voltage bias for the variable impedance component. The voltage bias sets the operation point of the variable impedance component, such that the voltage changes from the sensor change the impedance of the variable impedance component non-linearly.

A sensing unit for use in-body comprises a variable impedance circuit for connection to the distal end of a transmission line and reflecting a carrier signal received from the transmission line. The variable impedance circuit comprises a variable impedance component having an impedance which varies non-linearly with applied voltage, a sensor for generating a voltage in response to a stimulus and a voltage bias system for creating a voltage bias for the variable impedance component. The voltage bias sets the operation point of the variable impedance component, such that the voltage changes from the sensor change the impedance of the variable impedance component non-linearly.

In some embodiments, an electric field generator generates an electric field at a nominal frequency. A detector measures, at multiple time points during a measuring period, one or more properties of the generated electric field. In various embodiments, the one or more properties of the electric field change over time due to interactions with a human body in a reactive near-field region of the electric field. From the measured one or more properties, a computation unit determines one or more periodic behaviors (such as a respiration or heartbeat) and one or more non-periodic behaviors (such as movement of a limb). The computation unit also computes, from at least one of the periodic and non-periodic behaviors, one or more physiological parameters of the human body. From the one or more physiological parameters, the computation unit detects one or more symptoms of a condition of the human body.

In some embodiments, an electric field generator generates an electric field at a nominal frequency. A detector measures, at multiple time points during a measuring period, one or more properties of the generated electric field. In various embodiments, the one or more properties of the electric field change over time due to interactions with a human body in a reactive near-field region of the electric field. From the measured one or more properties, a computation unit determines one or more periodic behaviors (such as a respiration or heartbeat) and one or more non-periodic behaviors (such as movement of a limb). The computation unit also computes, from at least one of the periodic and non-periodic behaviors, one or more physiological parameters of the human body. From the one or more physiological parameters, the computation unit detects one or more symptoms of a condition of the human body.

An image generation apparatus includes a plurality of electrodes, a plurality of sensor cells, and a controller configured to provide a tomographic image of a measurement object on the basis of an intensity of a magnetic field generated by an alternating current supplied via the plurality of electrodes. The controller acquires the intensity of the magnetic field via the plurality of sensor cells.

An image generation apparatus includes a plurality of electrodes, a plurality of sensor cells, and a controller configured to provide a tomographic image of a measurement object on the basis of an intensity of a magnetic field generated by an alternating current supplied via the plurality of electrodes. The controller acquires the intensity of the magnetic field via the plurality of sensor cells.

Provided is a signal processing device capable of distinguishing and measuring a plurality of measurement targets even with simple configuration. The signal processing device including a reception processing unit that receives a response to a predetermined signal transmitted from a transmission antenna, and a determination unit that determines the plurality of measurement targets by a response to a plurality of signals corresponding to a second direction having a predetermined range different from a first direction having a predetermined range.