A sensor system has a low-noise sensor controller providing communications between an active-temperature-regulated optical sensor and an external monitor. A low-noise sensor controller drives optical emitters, receives resulting detected signals after attenuation by a blood perfused tissue site and communicates the detector signals to the attached signal processor. An optically-isolated controller front-end receives and digitizes the detected signals. A controller serializer transmits the digitized detector signal to the processor via a single, shielded coaxial cable.

A watch having a cover is described. An optical sensor subsystem is attached adjacent to or directly on an interior surface of the cover. In some cases, the optical sensor subsystem includes a substrate to which a light emitter and a light receiver are attached. The light receiver is configured to receive light emitted by the light emitter and reflected from the skin of a person that wears the watch. In some cases, the light emitter and light receiver are separated by a light-blocking wall that abuts the interior surface of the cover. In some cases, a light filter is attached adjacent or directly on the interior surface of the cover, between the cover and the light receiver.

A sensor may include a light source, a light detector, and a housing. The housing may have a first upper side and extend from the first upper side, a first cavity and a second cavity. The light detector is arranged in the first cavity. The light source is arranged in the second cavity. A strut may be arranged between the first cavity and the second cavity and is made from a material that absorbs or reflects light. A first cover may be mounted above the first cavity and comprises a deflection region and a plane of incidence. The deflection region is designed such that 80% of the light which is incident in the deflection region on the plane of incidence of the first cover from a predetermined direction and which is incident on the light detector, is directed away from the light detector based on an optical element.

An apparatus includes the following: a photoplethysmogram sensor head including a light emitter and a photo detector, wherein the photo detector is disposed in a diagonal orientation with respect to a light path from the light emitter to the light detector; and an opaque mask over the photo detector, wherein the mask covers at least partially that half of the photo detector that is at a greater distance from the light emitter and leaves a remaining half of the photo detector exposed.

An information monitoring device for monitoring information includes a temperature sensor that detects a body temperature from a person, a detection controller that performs control on the temperature sensor so that the temperature sensor repeats detection of the body temperature, a holding member that attaches the temperature sensor to the person to hold the temperature sensor, and an optical sensor that detects removal of the temperature sensor from the person.

An ear-wearable electronic device comprises a shell having a uniquely-shaped outer surface that corresponds uniquely to an ear geometry of a wearer of the device. The shell comprises a window through a proximal portion of the shell and positioned at ear canal tissue when the device is deployed in the wearer's ear. An optical sensor, such as a photoplethysmograph (PPG) sensor, is disposed in the window. A biasing member has a uniquely-shaped outer surface that corresponds uniquely to a geometry of at least a portion of a pinna of the wearer's ear. The biasing member is configured to generate a biasing force sufficient to maintain static positioning of the optical sensor relative to the ear canal tissue during wearer body and jaw movement.

Disclosed are instruments and methods for acquiring co-registered orthogonal fluorescence and photoacoustic volumetric projections of an interrogated object. In an embodiment, an instrument includes a rotary mechanism configured to rotate an interrogated object relative to an array of photoacoustic transducers and an optical detector. An optical excitation unit is configured to irradiate the interrogated object with pulses of light, inducing both fluorescence and photoacoustic responses inside the interrogated object at each of a plurality of rotational positions. The array of photoacoustic transducers includes unfocused elements arranged in a pattern along an axis of rotation, the elements configured to detect photoacoustic signals generated inside the volume of the interrogated object. The optical detector is arranged opposite to the array of photoacoustic transducers with respect to the axis of rotation and is configured to register sources of fluorescence excited inside the interrogated object. Each of the optical excitation axes form with each of the optical detection axes, and with each of the photoacoustic detection axes, angles that are between 60° and 90° so as to enable acquisition of co-registered orthogonal fluorescence and photoacoustic volumetric projections of the interrogated object.

Disclosed are absolute isolated light path structure, and a seat ring and a toilet seat using the absolute isolated light path structure. The absolute isolated light path structure comprises a light blocking plate, and a light emitting device and a light receiving device separated by the light blocking plate, the light blocking plate is configured for blocking light propagation between the light emitting device and the light receiving device, thereby avoiding the interference from the light emitted by the light emitting device to the light receiving device.

A grip-type electrocardiographic measuring device includes a main body portion that has a spheroid shape, a plate-shaped flange portion mounted on a side surface of the main body portion, a first electrocardiographic electrode disposed at a back surface side of the main body portion and making contact with one hand when the main body portion is gripped by the one hand, and a second electrocardiographic electrode disposed on a surface of the flange portion and making contact with a finger of the other hand when the flange portion is pinched by the other hand. The flange portion has flexibility and is bendable from a mounting portion on the main body portion.

An optical probe comprises three optical elements including at least one light source and at least one light detector. The three optical elements are positioned in a triangular configuration. Three optical fibers are each coupled to one of the three optical elements and have an exposed distal end portion. At least one light shroud is disposed radially around the exposed distal end portions of at least one of the optical fibers coupled to the at least one light source.