A remote sensing system for time-of-flight measurements may comprise an array of laser diodes with Bragg reflectors operating in the near-infrared wavelength range synchronized to a detection system comprising lenses, spectral filters and a photodiode array coupled to a processor. The time-of-flight depth information may be combined with various camera imaging systems. The camera system may comprise a lens system, prism and a sensor. In another embodiment, the data from two cameras may be combined with the time-of-flight depth information. Yet another embodiment comprises an imaging system with another array of laser diodes followed by a beam splitter and a detection system. The remote sensing system may be coupled to a smart phone, tablet or wearable device, and the combined data may provide three-dimensional information about at least some part of an object. Also, artificial intelligence may be used in the processing to make decisions regarding the depth and images.

A method and apparatus for determining a decay time of a luminescence of a sample, comprising the following steps: excitation of a light source by means of an excitation current from a current source; irradiating the sample with a light of a wavelength suitable for exciting luminescence in the sample, periodically varying the irradiation intensity; measuring a light emitted from the sample, generating a first electrical signal in response to the light emitted from the sample, and amplifying the first electrical signal; detecting a first phase difference between the excitation current and the amplified first electrical signal; generating a second electrical signal, wherein the second electrical signal is generated directly from the excitation current of the current source and is subsequently amplified; detecting a second phase difference between the excitation current and the amplified second electrical signal; and determination of the decay time of the sample's luminescence based on a phase difference between the excitation current and the sample's light emission.

An analyzer 10 for identifying or verifying or otherwise characterizing a liquid based drug sample 16 comprising: an electromagnetic radiation source 11 for emitting electromagnetic radiation 14a in at least one beam at a sample 16, the electromagnetic radiation comprising at least two different wavelengths, a sample detector 17 that detects affected electromagnetic radiation resulting from the emitted electromagnetic radiation affected by the sample, and a processor 18 for identifying or verifying the sample from the detected affected electromagnetic radiation, wherein each wavelength or at least two of the wavelengths is between substantially 1300 nm and 2000 nm, and each wavelength or at least two of the wavelengths is in the vicinity of the wavelength(s) of (or within a region spanning) a spectral characteristic in the liquid spectrum between substantially 1300 nm and 2000 nm.

A system for detecting and quantifying an analyte in a liquid includes a vial including one or more pre-dosed reagents disposed in the vial. The vial is configured to hold a volume of a liquid including an analyte. The one or more pre-dosed reagents are dissolvable in the volume of the liquid to form a sample liquid solution comprising chromophores or fluorophores. The analyte and the one or more pre-dosed reagents react to yield the chromophores or fluorophores. The system further includes a detection device including a chamber configured to retain the vial, the detection device configured to quantify the analyte in the sample liquid solution.

Disclosed is a method for measuring the absorbance of light of a substance in a solution in a measuring cell, said method comprising the steps of: transmitting a first light beam from a light source towards a beam splitter; dividing the first light beam into a signal light ray and a reference light ray by the beam splitter; modulating the signal light ray; modulating the reference light ray; providing the measuring cell such that the signal light ray passes through the measuring cell; detecting a signal in a detector, which signal is the combined signal intensity of the signal light ray and the reference light ray detected by the detector; performing synchronous detection of the detected signal in order to reconstruct the intensities of the signal light ray and the reference light ray from the combined signal detected by the detector, said synchronous detection being based on the modulation performed to the signal light ray and the reference light ray. Disclosed also is a measuring device for carrying out said method.

A method for measuring the attenuation coefficient of a scattering and/or absorbing part of a body using diffuse reflectance spectroscopy. The method includes emitting optical radiation, the intensity and/or the optical frequency of which are modulated, with at least part of the optical radiation, called a probe signal, irradiating the body; receiving part of the probe signal, called a backscattered signal, that is scattered and reflected by the body and measuring the path length of the backscattered signal; measuring the reflectance of the part of the body traversed by the backscattered signal; and computing the attenuation coefficient based on the measured path length and on the reflectance.

Analyte collection and testing systems and methods, and more particularly to testing systems and methods that achieve significant improvements in the detection of fluorescence signals in the reader by modulating the applied optical excitation. Also described herein are optical detection apparatuses and methods for removable photonic chips that do not require translation for calibration when coupling the photonics chip with the sensing system. Also described herein are methods and apparatuses for accurately calibrating a dilution factor when reading from a photonics chip.

A spectroscopy system and method enhance the resolution of narrow spectral features by modulating the injection current of a gain chip in a tunable laser. The system includes a tunable laser with an external cavity formed between the gain chip and an external reflector, containing a wavelength-selective element like a tilt-tuned interference filter. An oscillator drive signal modulates the injection current at high frequency and amplitude, altering the effective optical length of the external cavity and shifting the cavity modes over a range sufficient to resolve narrow spectral lines. This modulation ensures effective interaction with narrow absorption features in the sample. Operating at frequencies above the detector's bandwidth allows averaging over the modulation, reducing noise and improving signal quality. This technique is particularly beneficial for low-pressure gas spectroscopy, enabling precise detection and analysis of specific species within a sample.

According to one embodiment, a gas detection device includes a driver section, an element section, a sensor, and a detector. The driver section includes a first driver and a second driver. The element section includes a first laser and a second laser. The first laser is configured to be driven by the first driver to emit a first beam. A first wavelength of the first beam is configured to change at a first frequency. The second laser is configured to be driven by the second driver to emit a second beam. A second wavelength of the second beam is configured to change at a second frequency. The second frequency is different from the first frequency. The second wavelength is different from the first wavelength. The sensor is configured to detect a received beam based on the first beam and the second beam.

A LIDAR system is adapted for performing differential absorption measurements of a chemical compound between two distinct optical frequencies (1, 2), and for measuring a separation distance from an obstacle which is present in a background of a measurement zone where the absorption occurs. An emission optical power value is varied between different time intervals during a radiation emission sequence, in order to allow that the LIDAR system implements an optical fiber technology while having sufficient emission power. The LIDAR system makes it possible to evaluate an amount of the chemical compound which is contained in the measurement zone, as well as a separation distance from an obstacle which is located in the background of the measurement zone.