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NIR Reflection of Plastic for Recycling Applications

Posted on: May 27th, 2020

The importance of NIR reflection spectra has proven to be a reliable method of identifying unique characteristics and properties of various materials, including types of plastics. Different types of plastics may look similar to one another at an initial glance with the naked eye, but evaluating the NIR reflection properties of plastics can reveal just…

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Absorption and Reflection Spectra of Lichen

Posted on: April 27th, 2020

Conducted by: David Ademe, Avantes Inc. Theme: Absorption/Reflection of Lichen Background/Applications: Absorption and reflection spectra can reveal the unique properties of many different types of materials and samples. This includes biological samples and plant life. This can range from leaf’s, flower petals, grass and lichen. The optical properties of lichens have been traditionally explored in…

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Near-infrared Absorption and Reflection Chemometrics

Posted on: March 25th, 2020

Near-infrared Absorption and Reflection measurements can be used to determine the properties of various samples, such as concentrations of chemicals and the quality of plastics. Not only can absorption spectra be used to identify the characteristics of many types of samples, but it can also be used to characterize the unique spectra of each sample…

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Model for the Identification of Edible Oils

Posted on: February 26th, 2020

Background/Applications: Absorption measurements can be used to determine the properties of various samples, such as concentrations of chemicals and the quality of plastics. Not only can absorption spectra be used to identify the characteristics of many types of samples, but it can also be used to characterize the unique spectra of each sample to generate…

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Plasma Measurements and Diagnostics

Posted on: January 23rd, 2020

Background/Applications: Optical Emission Spectroscopy, often referred to as OES, is a widely used analytical method to determine the elemental composition of a broad range of metals. Types of samples which can be tested using OES include samples from the melt in primary and secondary metal production, and in the metals processing industry. OES commonly uses…

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Season of Lights: Christmas Light Irradiance Measurements

Posted on: December 19th, 2019

Conducted by: David Ademe, Avantes Inc. Theme: LED’s/Irradiance Background/Applications: Spectral irradiance is the irradiance of a surface per unit frequency or wavelength, depending on whether the spectrum is taken as a function of frequency or of wavelength. The two forms have different dimensions: spectral irradiance of a frequency spectrum is measured in watts per square…

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NIR Grain Analysis

Posted on: November 21st, 2019

Conducted by: David Ademe, Avantes Inc. Theme: Grains/Agriculture Background/Applications: Absorption and reflection measurements can be used to determine the freshness of various crops, from fruits and vegetables to even grains. Not only can reflection and absorption spectra be used to identify the properties of different types of grains through chemometric models, but it can also…

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Buckets of Blood: Absorbance Spectra Comparison with Fake Blood

Posted on: October 25th, 2019

This month’s spectra celebrates the Halloween season as we measure spectra results obtained from BLOOD! Background/Applications: Absorption spectroscopy is used across a wide range of industries and is an effective form of scientific analysis in many fields of research. This includes the medical field for studying blood. For example, absorbance spectroscopy has been used to…

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VIS/NIR Spectroelectrochemical Response

Posted on: September 26th, 2019

Background This spectra feature was provided by Pine Instruments as an example of a spectroelectrochemistry application that measures electrochemical response over a range of applied electrical potential and correlated against energy absorption by wavelength. Researchers Greenlee, et al. were measuring the electrochemical response of PMDI’s that were functionalized with 4-(dimethylamino) pyridinium (DMAP+) groups.  The functionalization…

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Single and Multi-Mode VCSEL Testing

Posted on: September 12th, 2019

This Month’s spectra were contributed by a current Avantes customer in the manufacturing of Vertical Cavity Surface Emitting Lasers (VCSEL). Parameters Measured We utilize Avantes spectrometers to measure spectral peak wavelength, centroid, SMSR, FWHM, and RMS spectral bandwidth of a broad range of VCSEL-based laser products. Wavelength Range 650nm to ~1000nm Laser Power 10’s of…

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