A spectrometer and a spectral detection and analysis method implemented by the spectrometer. The spectrometer includes an optical device and a detection device. The optical device includes at least one light filter, each of which including at least two light filtering units, so that the optical device can emit at least two kinds of monochromatic light. The detection device includes at least one detector, each of which comprising at least two detection units facing at least two light filtering units in the corresponding light filter in a one-to-one relationship. The monochromatic light emitted from the light filtering unit is emitted along the direction perpendicular to the direction of the light emitting surface.

A measurement system is provided with an array of laser diodes to generate light having one or more optical wavelengths. A detection system is provided with at least one photo-detector, a lens and a spectral filter at an input to the at least one photo-detector. The measurement system is further configured to transmit at least a portion of the output signal, indicative of an output status, to a cloud service over a transmission link. The cloud service is configured to receive the output status, to generate processed data based on the received output status, and to store the processed data, and wherein the cloud service is capable of storing a history of at least a portion of the received output status over a specified period of time.

Spectrometer designs are provided. The spectrometer includes two planar diffraction gratings disposed in a cascade, without intervening optics therebetween. Advantageously, the described configurations may promote both a high throughput and a high resolution, enabling the design of a portable device having sufficient resolution for on-site use or in the laboratory. In some implementations, two different secondary diffraction channels may be provided.

A measurement system is provided with an array of laser diodes with one or more Bragg reflectors. At least a portion of the light generated by the array is configured to penetrate tissue comprising skin. A detection system configured to: measure a phase shift, and a time-of-flight, of at least a portion of the light from the array of laser diodes reflected from the tissue relative to the portion of the light generated by the array; generate one or more images of the tissue; detect oxy- or deoxy-hemoglobin in the tissue; non-invasively measure blood in blood vessels within or below a dermis layer within the skin; measure one or more physiological parameters based at least in part on the non-invasively measured blood; and measure a variation in the blood or physiological parameter over a period of time.

An optical imaging system employing a device containing a sequence of first (pre-dispersor) and second (main) volume holograms configured to operate as a sequence of optical diffractive elements possessing different blazing curves. A pre-cursor hologram has a thickness smaller than the thickness of the following, disperser hologram, and a comparatively broad spectral selectivity as compared to that of the main hologram, allowing the pre-cursor to diffract light in transmission within a very large range of the angles of incidence. The use of the combination of the pre-cursor and the main holograms not only implements selective imaging of the chosen target object at every angle at which various portions of the object are seen at the optical system, but also facilitates the spectroscopic measurements of such object.

A system for measuring one or more physiological parameters is provided with a wearable device that includes a light source comprising a driver and a plurality of semiconductor sources that generate an output optical light. The wearable device comprises: one or more lenses to receive at least a portion of the output optical light and to deliver a lens output light to tissue, and a detection system to receive at least a portion of the lens output light reflected from the tissue and to generate an output signal having a signal-to-noise ratio, and to be synchronized to the light source. The detection system comprises at least one analog to digital converter coupled to at least one spatially separated detector. The plurality of semiconductor sources comprises six light emitting diodes, and wherein the plurality of semiconductor sources and the plurality of spatially separated detectors are located on one or more arcs.

The technology provides a spectroscopy system having two or more spectrometers with substantially uniform focal lengths. The spectrometers include a detector that converts optical signals into electrical signals to render spectral data. The spectroscopy system includes a computing device that is electrically coupled to one or more detectors to receive the spectral data and compare the spectral data against other spectral data. The other spectral data originates from spectrometers that have substantially similar focal lengths, slit widths, excitation laser wavelengths, or any combination of these. The technology includes an application server that is communicatively coupled to a second spectroscopy system. The application server includes software that enables data sharing among the two or more spectroscopy systems, including sharing the spectral data and the other spectral data. The application server compares sampled spectral data against stored spectral data to identify a match.

An imaging system (200) for generating a measure of authenticity of an object (10) comprises a dispersive imaging arrangement (30) and an image sensor arrangement (60). They are positioned so that, when electromagnetic radiation (20) from the object (10) illuminates the dispersive imaging arrangement (30), the electromagnetic radiation is dispersed and imaged by the image sensor arrangement (60). The imaging system (200) is configured to then generate a measure of authenticity of the object (10) depending at least on a relation between the imaged dispersed electromagnetic radiation and reference spectral information. The invention also relates to imaging methods, computer programs, computer program products, and storage mediums.

A sensing system includes laser diodes with Bragg reflectors generating light having an initial light intensity and one or more near-infrared optical wavelengths. The laser diodes are modulated with a pulsed output with 0.5 to 2 nanosecond pulse duration. A beam splitter receives light from the laser diodes, splits the light into a received sample arm light directed to an object and a received reference arm light. A detection system includes a second lens and spectral filters in front of a photodiode array. The photodiode array is coupled to CMOS transistors and receives at least a portion of the received reference arm light and generates a reference detector signal. The detection system is synchronized with the laser diodes. A time-of-flight measurement is based on a comparison of the sample detector signal and the reference detector signal and measures a temporal distribution of photons in the received reflected sample arm light.

An optical device and a spectral detection apparatus are provided. The optical device includes an optical waveguide, including: a polychromatic light channel configured to transport a polychromatic light beam, and provided with a light incident surface for receiving the incident polychromatic light beam at an input end of the polychromatic light channel; a chromatic dispersion device arranged downstream from the polychromatic light channel in an optical path and configured to separate the polychromatic light beam from the polychromatic light channel into a plurality of monochromatic light beams; and a plurality of monochromatic light channels arranged downstream from the chromatic dispersion device in the optical path and configured to respectively conduct the plurality of monochromatic light beams with different colors from the chromatic dispersion device. Monochromatic light output surfaces are respectively provided at output ends of the plurality of monochromatic light channels and configured to output the monochromatic light beams.