Disclosed are methods of fabricating an integrated computational element for use in an optical computing device. One method includes providing a substrate that has a first surface and a second surface substantially opposite the first surface, depositing multiple optical thin films on the first and second surfaces of the substrate via a thin film deposition process, and thereby generating a multilayer film stack device, cleaving the substrate to produce at least two optical thin film stacks, and securing one or more of the at least two optical thin film stacks to a secondary optical element for use as an integrated computational element (ICE).

An optical inspection device 1A includes a light selection unit 30, a detection element 40, and a first image formation element 20. The light selection unit 30 has the plurality of wavelength selection regions 32 that selectively transmits or reflects the light rays L of mutually different wavelength regions. The detection element 40 detects scattering characteristic information of the light rays L having reached the light receiving surface 41 via the light selection unit 30. The first image formation element 20 causes scattered light scattered by a subject S to enter a light receiving surface 41 via the light selection unit 30. The plurality of wavelength selection regions 32 has different azimuth angles with respect to the optical axis Z of the first image formation element 20.

A methodfor measuring an amount of a gaseous species present in a gascomprises placing the gas between a light source and a measurement photodetector. The light source is able to emit an incident light wave that propagates through the gas to the measurement photodetector. The gas is illuminated with the light source. A measurement intensity, of the light wave transmitted by the gas, is measured with the measurement photodetector. An intensity of a reference light wave, emitted by the light source in a reference spectral band, is measured with a reference photodetector. The illumination and measuring are performed at multiple measurement times, at each of which the gas's absorption of the incident light wave is estimated and an amount of the gaseous species is estimated on the basis of the estimated absorption. Estimating the absorption comprises applying a correction function, that varies over time, to the reference intensity.

A monitoring device for monitoring a status of fruits, the monitoring device comprising: a flexible strip configured to be introduced into a cluster of fruits allowing the flexible strip being embedded in the cluster, the flexible strip comprising a plurality of spatially separated sensing nodes, wherein each of the plurality of sensing nodes comprises a sensing node light source configured to emit light and a sensing node light detector configured to detect light, a read out circuitry configured to read out data pertaining to the detected light detected at each of the plurality of sensing nodes, a body comprising a wireless communication module configured to transmit the data pertaining to the detected light, wherein the flexible strip is attached to the body. A system comprising a plurality of monitoring devices and a method for monitoring a status of fruits are further provided.

A monitoring device for monitoring a status of fruits, the monitoring device comprising: a flexible strip configured to be introduced into a cluster of fruits allowing the flexible strip being embedded in the cluster, the flexible strip comprising a plurality of spatially separated sensing nodes, wherein each of the plurality of sensing nodes comprises a sensing node light source configured to emit light and a sensing node light detector configured to detect light, a read out circuitry configured to read out data pertaining to the detected light detected at each of the plurality of sensing nodes, a body comprising a wireless communication module configured to transmit the data pertaining to the detected light, wherein the flexible strip is attached to the body. A system comprising a plurality of monitoring devices and a method for monitoring a status of fruits are further provided.

A portable device for detecting and/or quantifying hemozoin by optical reflectance spectrophotometry, directly on the patient's skin, on tissues or in a liquid sample which comprises means for calibrating the device; at least one optical emitter to excite the sample; at least eight optical detectors to detect the reflectance spectrum of the sample; at least eight bandpass optical filters to filter the reflected light for each optical detector; wherein the optical filters and optical detectors are aligned with each other, wherein the emitter and optical detectors are positioned allowing reflection of the emitted light towards the optical detectors, wherein the optical filters and optical detectors comprise wavelengths between 400 nm and 800 nm; and a microcontroller configured to calculate a ratio between the reflectance values of the sample at each wavelength to detect the reflectance peaks. Also disclosed is a method of detecting and/or quantifying hemozoin by optical reflectance spectrophotometry.

A gas sensor (2) distinguishes between a target gas and a contaminant and includes a light source (8), a measurement volume (4), a detector (22), and an adaptable filter system (20) with a first optical filter and a second optical filter. The filter system switches between a first composite state, with both filters in a reference state, a second composite state, with the first filter in a first reference state and the second filter in a second measurement state, a third composite state with the first filter in a first measurement state and the second filter in a second reference state, and a fourth composite state, with both filters in a measurement state. The gas sensor detects a target gas and makes a determination as to a presence of the contaminant by comparing the respective detector signals, generated during at least three of the composite states, with each other.

A device (1) for determining the concentration of a gas component is configured with a radiation source (30) for emitting (31) a light radiation or heat radiation in an infrared wavelength range. A detector array (40) has at least two detector elements (50, 60), configured to detect the radiation generated by the radiation source (30), in an angular arrangement (52, 62) and with filter elements (51, 61). At least one of the two detector elements (50, 60) is oriented in an angular arrangement (52, 62) in relation to a vertical axis (32), so that a range of overlap (65) is obtained due to the angular arrangements (52, 62). The range of overlap (65) causes attenuations in the propagation of light, which attenuations may be due, for example, to gas molecules or moisture (400), affect both detector elements (50, 60) and are thus compensated concerning the concentration determination.

A harvesting apparatus for a fruit or vegetable product includes a maturity determination device to determine a maturity level of the fruit or vegetable product; a harvester to harvest the fruit or vegetable product; a power source generator to drive the harvester; and a controller to determine whether or not to supply the power to the harvester based on a determination result on the maturity level provided by the maturity determination device.

Disclosed are methods of fabricating an integrated computational element for use in an optical computing device. One method includes providing a substrate that has a first surface and a second surface substantially opposite the first surface, depositing multiple optical thin films on the first and second surfaces of the substrate via a thin film deposition process, and thereby generating a multilayer film stack device, cleaving the substrate to produce at least two optical thin film stacks, and securing one or more of the at least two optical thin film stacks to a secondary optical element for use as an integrated computational element (ICE).