A measuring method for measuring dissolved oxygen includes performing a first measurement sequence, including: emitting a first stimulation signal onto a sensor for a first period; detecting a first detection signal; determining a phase shift between the first stimulation signal and the first detection signal; and calculating a first measured value based on the determined phase shift. Performing a second measurement sequence, including a second stimulation signal onto the sensor for a second period, wherein the second stimulation signal is different than the first stimulation signal; detecting a second detection signal; determining a decay time of the second detection signal; calculating a second measured value based on the decay time. The method further includes comparing the first measured value to the second measured value and correcting the first measured value when a difference between the first measured value and the second measured value is greater than a first limit value.

An optical imaging system includes a light source, a light detector and an aperture plate. The light source includes a plurality of light emitting devices which emit light that is directed toward an object to be illuminated. The light detector is positioned to view the object illuminated by the light source. The aperture plate is positioned relative to the light source to block a first portion of the light emitted by the light source and to allow a second portion of the light emitted by the light source to pass therethrough to illuminate a pre-defined area of the object. The aperture plate includes a plurality of spaced apart apertures formed through the thickness thereof. Each aperture corresponds to a respective light emitting device. Each aperture of the aperture plate is defined by a first opening formed in the thickness of the aperture plate and a second opening formed in the thickness of the aperture plate. The second opening partially overlaps the first opening and is partially offset from the first opening. The first and second openings' planar shapes match the shape of the desired illumination area, with the first openings being smaller than the second openings. A method for illuminating a defined area of an object includes the steps of energizing one or more light emitting devices of a light source in an optical imaging system, which energized light emitting device or devices emit light that is directed toward the object to be illuminated. The light is passed through particularly-shaped apertures, such as described above, formed in an aperture plate positioned between the light source and the object to be illuminated. The apertures in the plate only allow light passing therethrough to impinge on the object at a pre-defined area thereof.

A system for characterizing at least one particle from a fluid sample is disclosed. The system includes a filter disposed upstream of an outlet, and a luminaire configured to illuminate the at least one particle at an oblique angle. An imaging device is configured to capture and process images of the illuminated at least one particle as it rests on the filter for characterizing the at least one particle. A system for characterizing at least one particle using bright field illumination is also disclosed. A method for characterizing particulates in a fluid sample using at least one of oblique angle and bright field illumination is also disclosed.

A device for monitoring at least one parameter of a fluid specimen obtained from a patient. The device has a fluid conduit holder comprising a clamp configured to position a fluid conduit, which holds the fluid specimen obtained from the patient, in a position for optical analysis, and an optical analyzer having a light source and a light detector. The optical analyzer is configured to expose the fluid specimen contained within the fluid conduit to an illuminant and measure light received at the detector. The device has an optical alignment mechanism mechanically coupling the light source, the clamp, and the light detector together, and configured to align at least the light detector with the fluid conduit at the position for optical analysis.

Embodiments described herein generally relate to: sensing and/or authentication using luminescence imaging; diagnostic assays, systems, and related methods; temporal thermal sensing and related methods; and/or to emissive species, such as those excitable by white light, and related systems and methods.

An automatic analysis apparatus comprises: a light source generating light having a center wavelength equal to or shorter than 340 nm; a fluorescent substance excited by the light source light, and generates light together with transmitted light from the light source, having a wavelength of 340 nm to 800 nm; a condenser lens; at least one slit; a reaction cell holding a reaction solution where a specimen and reagent are mixed, and that the light source light and the light from the fluorescent substance enter; and a detector that detects light transmitted through the reaction cell. The light source, fluorescent substance, condenser lens, and slit are provided along a straight light corresponding to the optical axis. The width of the slit's opening is equal to or narrower than the width of a ray forming an image of the light source at the position of the slit.

In-situ fluorimeters and methods and systems for collecting and analyzing sensor data to predict water source contamination are provided. In one embodiment, a method is provided that includes receiving sensor data regarding a water source. Changepoints may then be calculated within the sensor data and the sensor data may be split into intervals at the changepoints. A machine learning model may then be used to classify the intervals and a predicted contamination event for the water source may be identified based on the classified intervals. In another embodiment, an in-situ fluorimeter is provided. The in-situ fluorimeter comprises one or more UV LEDs centered around a pre-set excitation wavelength (e.g., a TLF excitation wavelength), a bandpass filter, a lens, a photodiode system, a machine learning platform; and an alarm triggered by contamination events, wherein the alarm is calibrated through the machine learning system.

The present invention relates to the identification of proteins involving measurement and characterisation of multidimensional aspects of said proteins.

An arrangement and a computer program product are provided for determining body surface characteristics. An arrangement includes an acquisition unit configured to detect body surface features by Multiple Spatially Resolved Reflection Spectroscopy (MSRRS) in a wavelength range between about 300 nm and about 1500 nm; a data storage unit to interrogate data using the characteristics; and a user interface comprising an output unit, wherein the user interface is configured to interact with a user. Further, the arrangement includes a portable computing unit configured for: interacting with a user and for evaluating the features and for determining the characteristics based on the features; obtaining from the data storage unit features of treatment products and/or application instructions for non-therapeutic treatment of a body surface according to the characteristics; and instructing the output unit to output information on the treatment products and/or application instructions to a user.

Near InfraRed NIR technology, including NIR cameras and detectors, is used to accurately determine the strength of the green veneer sheet or other wood product. Based on the determined strength for a given green veneer sheet or other wood product, one or more actions are taken with respect to green veneer sheet or other wood product to ensure the green veneer sheet or other wood product is put the most efficient, effective, and valuable use.