Spectra of the Month (April, 2022) Conducted by: David Ademe (Applications Engineer), Avantes Inc. Theme: LIBS Background/Applications: Laser-Induced Breakdown Spectroscopy (LIBS) is a type of atomic emission spectroscopy which uses a highly energetic laser pulse as the excitation source. The laser is focused to form a plasma, which atomizes and excites samples. The formation of…
Read MoreSpectra of the Month (March 2022) Conducted by: David Ademe (Applications Engineer), Avantes Inc. Theme: Transmission Background/Applications: Transmission spectra can be used in a wide range of measurements and data collection to reveal unique and unknown properties of materials. It is crucial to understand how materials that we interact with behave when exposed to photons…
Read MoreTheme: Fluorescence Conducted by: David Ademe (Applications Engineer), Avantes Inc. Background/Applications: Fluorescence spectroscopy is a method where a single wavelength/band of light is used to excite a sample that emits a different wavelength of light as a result. Fluorescence has many uses, from medical studies, biological applications, chemistry experiments and sample classification. For example, the type…
Read MoreConducted by: David Ademe (Applications Engineer), Avantes Inc. Theme: Biomedical, Reflection/Transmission Background/Applications: Often times in medical applications, surrogate samples (also known as tissue phantoms) are used to simulate human tissue. Optical tissue phantoms are synthetic models mimicking not only human tissue properties but also light propagation and interactions through it. They are reported to be…
Read MoreConducted by: David Ademe (Applications Engineer), Avantes Inc. Background/Applications: Spectral irradiance is the energy 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…
Read MoreConducted by: David Ademe, Avantes Inc. Theme: Agriculture Background/Applications: Absorption and reflection measurements can be used to determine the freshness of various crops, from grains to fruits and vegetables. NIR spectroscopy is leading the way for the future of agriculture and food production for both qualitative and quantitative measurements. In this experiment, we will be…
Read MoreConducted by: David Ademe, Avantes Inc. Theme: Absorbance/ATR Probe Background/Applications: Absorbance spectroscopy can bring entirely new perspectives on samples through a wide range of industries. This includes industrial lines, where continually monitoring of water, fluids, and chemicals is necessary to ensure consistent quality and specifications. Many inline control systems use UV/VIS absorbance systems to control…
Read MoreConducted by: David Ademe, Avantes Inc. Theme: Absorbance Background/Applications: Absorbance spectroscopy can bring entirely new perspectives on samples through a wide range of industries. This includes the water industry, verifying the quality and purity of water to determine what contaminants and particles may be present in the water, that may not be visible to the…
Read MoreBackground/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 meter per hertz (W·m−2·Hz−1), while spectral irradiance of…
Read MoreRadiometry deals with the measurement of all optical radiation inclusive of the visible portion of this radiant energy. Irradiance is a parameter of radiometry that describes the amount of radiant power upon a surface per unit area. These measurements can be done in the UV, VIS and NIR wavelength ranges. Irradiance measurements are useful in…
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