The present disclosure includes an imaging sensor, an imaging method, and a non-transitory computer-readable medium. The imaging sensor includes a plurality of wavelength detection regions. The plurality of wavelength detection regions including at least a first wavelength detection region. The first wavelength detection region comprises a plurality of pixels configured to detect light within a first pre-determined wavelength range, and detect the light at different pre-determined polarization directions.

A system for non-invasively measuring an analyte in a vehicle driver and controlling a vehicle based on a measurement of the analyte. At least one solid-state light source is configured to emit different wavelengths of light. A sample device is configured to introduce the light emitted by the at least one solid-state light source into tissue of the vehicle driver. One or more optical detectors are configured to detect a portion of the light that is not absorbed by the tissue of the vehicle driver. A controller is configured to calculate a measurement of the analyte in the tissue of the vehicle driver based on the light detected by the one or more optical detectors, determine whether the measurement of the analyte in the tissue of the vehicle driver exceeds a pre-determined value, and provide a signal to a device configured to control the vehicle.

A hemoglobin detecting method is executed by a mobile device having a hemoglobin detecting function. The mobile device includes a processor unit, a first light source that generates a first light beam, and a light detecting module that receives a second light beam that is generated when the first light beam travels through an analyte solution and is reflected. The light detecting module generates first to fourth intensity signals according to the second light beam, and the processor unit determines whether the absorption spectrum of the analyte solution matches a target spectrum. If the absorption spectrum of the analyte solution matches the target spectrum, the processor unit generates positive result information; otherwise, the processor unit generates negative result information. The mobile device provides a fast and accurate way to detect blood in a stool solution, which does not require collecting samples of stool or applying any chemical.

A method for measuring a concentration of at least one target species includes generating first and second laser beams having respective first and second wavelengths each corresponding to respective absorption lines of the at least one target species. The method includes coupling the first and second laser beams to proximal ends of first and second fundamental modes of first and second optical waveguides, respectively. The method includes transmitting through a measurement zone, for a distal end of the first and second optical waveguides, a probe signal including the first and second laser beam. The method includes determining a first signal strength of the probe signal at the first wavelength and a second signal strength of the probe signal at the second wavelength, and determining, from the first signal strength and the second signal strength, a concentration of the at least one target species.

A method and apparatus for calibrating an optical surface condition monitoring system (1). Light beams at different wavelengths (.sub.1, .sub.2) are emitted to a reference substrate (2) at different distances (L.sub.1, L.sub.2) as well as to sample substrates (5) at a specific distance (L.sub.specific). Subsequently, ratios between the signals scattered back from the reference substrate (2) and the signals scattered back from the sample substrates (5) are calculated. Then, input data regarding a measurement distance (L.sub.measurement) between a target surface (8) to be monitored, for example a road, and the receiver (3) of the system (1) is provided. Further, a preset program is selected. Dry calibration of the system (1) can then take place based on the calculated ratios, the measurement distance (L.sub.measurement) and the selected program. Dry calibration can be calculated without having to perform an actual dry calibration in the field and no dry calibration plate or dry spot of the target surface (8) is required.

A handheld hemoglobin detecting device has a housing assembly including a holding base, a tubular housing and a liquid holder, a control module disposed on the housing assembly, and a lighting assembly mounted in the tubular housing and including a light emitting module, a light concentrator, and a light guide. At least one light beam emitted from the light emitting module passes through and is concentrated by the light concentrator to shine on the liquid holder, is reflected by a light reflector that is disposed in the liquid holder, enters the light guide, and is transmitted to a light sensor. The handheld hemoglobin detecting device has a simplified structure and is easy to assemble, and thus is light and has low manufacturing cost. Moreover, a lower accuracy in assembling the lighting assembly can be tolerated.

A measurement system and method for measuring at least one parameter in a body tissue comprise at least one measurement device to be applied to the body, an optical unit for emitting light waves, wherein at least one wavelength of the light waves lies in the region of the absorption of a body parameter, at least one light guide between the optical unit and the measurement device in order to transmit light waves, and an evaluation unit for evaluating measurement waves. Light waves emitted by the optical unit can be beamed into an optical measurement volume in the body tissue by means of the measurement device, and measurement waves received by the measurement device from the measurement volume can be transmitted from the body tissue to the evaluation unit. The evaluation unit comprises a transformation algorithm, which transforms pulsatility of a body parameter measured in the measurement volume into a parameter of the pressure in the body tissue, wherein the body parameter is measured by determining the absorption of the light waves.

The concentration of a targeted molecule (such as glucose) in a liquid medium having at least one interfering molecule coexisting with the targeted molecule is detected by use of NDIR and a sampling technique in which an imposed location of a pulse beam from a signal source, an interference source and a reference source is varied over a plurality of sites of a sampling area.

A colorimeter accessory for a smartphone is provided that, by leveraging the high-volume development of sophisticated smart phone technology, substantially reduces the cost of a colorimeter. The invention provides a sample holder that adapts to a range of smart phone cameras and that provides a light source and interference filter necessary for making accurate narrowband measures of light transmission through the sample holder. A correction system operates to compensate for characteristics of the smart phone camera that can affect accuracy of the reading. The processing system of the smart phone may be enlisted for this correction system and for calculation of concentrations of solution through the measurements that are made.

A method for measuring bilirubin concentration in a sample includes preparing a sensing element, where the sensing element may include a plurality of carbon dots, adding the sample to the sensing element, where the sample may include a plurality of bilirubin molecules, obtaining a first grayscale image of the sensing element under ultra-violate (UV) irradiation, irradiating visible light with a wavelength between 470 nm and 490 nm on the sensing element, obtaining a second grayscale image of the sensing element under ultra-violate (UV) irradiation, calculating a light intensity difference by calculating a difference between a first average light intensity of the first grayscale image and a second average light intensity of the second image, and determining the bilirubin concentration based on a correlation between the bilirubin concentration and the light intensity difference.