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SPECTROSCOPY WHITE PAPERS
Photobiological Safety MeasurementsIn recent decades, advances in materials science and technology have substantially improved the quality of lighting products. LEDs in particular have become more rugged, with higher efficiencies, greater stability, and emit significantly higher optical power over a wide range of spectral regions. The growing concern over the physical repercussions of increasing human exposure has led to the creation of an international standard governing photobiological hazard assessment of lamps and lamp...
Boost Efficiency in the QC Laboratory: How NIRS Helps Reduce Costs up to 90%Underestimation of quality control (QC) processes is one of the major factors leading to internal and external product failure, which have been reported to cause a loss of turnover between 10–30%. As a result, many different norms are put in place...
Understanding the Light-Harvesting Photosystem IIThe ability of plants to live, thrive, and survive on sunlight provides unsurpassed motivation to understand and mimic this process for solar energy production. Photosystem II has long been studied and admired by scientists eager to harness its...
Use of Single-Frequency DPSS Lasers in RamanWhilst diode lasers have advantages in terms of cost and efficiency, they are inherently limited in line-width narrowness and spectral purity. It’s particularly true for shorter wavelengths as it makes them unsuitable when high resolution is needed....
Emission Tail of Indium Phosphide Quantum DotsSemiconductor quantum dots (QDs) have unique tunable photoluminescence properties which lend them to a range of important technological applications including solid-state lighting, displays, photovoltaics, and biomedical imaging. Indium phosphide...
Identifying Thermally Activated Delayed Fluorescence using a SpectrofluorometerTADF was first observed in 1924 by Francis Perrin. In 2012 it received a resurgence in attention when Professor Chihaya Adachi and colleagues at Kyushu University used the TADF mechanism to harvest triplet excitons in organic light emitting diodes...
Photodigm HOT­­™ DBR LasersThe Photodigm family of high-power edge-emitting Distributed Bragg Reflector (DBR) laser diodes is based on Photodigm’s proprietary single epi growth DBR laser architecture. Since their introduction over 10 years ago, Photodigm DBR lasers have...
Advantages of VPH GratingsTransmission gratings open up many design options for the optical designer. In this tech note, we consider one special type: volume phase holographic (VPH) gratings. With benefits ranging from superior optical performance and design flexibility to...
Benefits of Client-Server Systems for Quality Control with Vis-NIR SpectroscopyAnalyzer systems monitoring product quality can offer substantial advantages when organized in a client-server network compared to the more traditional local installation. This white paper presents different client-server setups and their benefits....
Kinetics of Photocatalysis Reactions Studied by Transient Absorption SpectroscopyPhotocatalysis is the rate increase of a chemical reaction by light, often in the presence of a catalyst that starts the reaction upon irradiation. Photocatalysts are typically semiconducting metal oxides which are employed as particles in solution....
What is a Color Filter?Broadband filters are used to improve the contrast and performance of optical scanners with red, yellow, and amber led displays. Medium density three-slot filters and polarizers enhance the contrast of liquid crystal displays (LCDS) by reducing...
Study of Fluorescence Quenching Kinetics Using Stopped FlowIn this application note the kinetics of NATA quenching by QBS are determined using a Photoluminescence Spectrometer equipped with a stopped-flow accessory.
Highly Efficient Tunable Filter for Broadband Light SourceA new, simple and compact approach for tunable wavelength filtering is introduced with a device called Flexible Wavelength Selector. This new device combines the flexibility of a monochromator with the imaging functionality of a thin-film...
Learn about the Rhea Spectrometer SeriesAdmesy’s Rhea is a flexible platform in configurable spectral measurement demands within the range between 200 and 1100 nm. Various choices in slit size, gratings, and sensors allow you to build the perfect spectral measurement solution for your...
Measuring the Phosphorescence Spectrum of a TADF EmitterIn this application note the measurement of the low temperature phosphorescence spectrum of a TADF emitter using a gated PMT is demonstrated.
Cloud-Based, AI Deep Learning Enabled Handheld Raman for Mixture AnalysisCloudMinds XI™ is the world’s first cloud-based, AI deep learning enabled handheld Raman spectrometer. Being integrated with a smartphone, its operation is fully automated with an intuitive android app suitable even for novice users. XI™...
Make or Buy Your SpectrometerOne of the challenges instrument makers face today is an increasing need to bring new innovative products to the market faster and at a lower cost. Spectrometers are an essential component in analytical instruments for a broad range of applications,...
Lean Manufacturing of Polyurethane, Assisted by Near-Infrared (NIR) and Raman SpectroscopyChemical manufacturing such as polyurethane production is characterized by a cost intensive production process combined with a negative ecological impact. These adverse effects can be significantly improved by using vibrational spectroscopy. This...
Identifying Thermally Activated Delayed Fluorescence (TADF)OLEDs have become one of the most popular display types for high-end televisions and smartphones due to their superior contrast ratios and lower power consumptions than conventional LCD displays. A new generation of OLED utilising thermally...
A High-Quality Raman Microscope Can Be Recognized by These 5 CriteriaRaman spectroscopy long remained a technique that was only performed in special laboratories. In recent years, however, it has been increasingly losing its outsider status. The reason for this is the development of the confocal Raman microscope,...
High-Resolution Chemical Imaging with Tapping AFM-IRWhere the spatial resolution of conventional bulk IR spectroscopy is limited by diffraction to ~3-10 µm, atomic force microscopy (AFM) provides a nanoscale topographic map of a sample surface. However, AFM has been unable traditionally to chemically...
Electroluminescence and Photoluminescence Spectroscopy of a Phosphorescent Organic Light Emitting Diode (PhOLED)Investigation of emission properties of a PhOLED. The spectrum and chromaticity coordinates of the emission and the triplet lifetime are determined using time-resolved spectroscopy.
X-Ray ToroidsOptical fabrication techniques discussed to produce bent crystal analyzers that conform to toroidal surfaces for hard and soft x-ray applications including x-ray spectroscopy, ultrafast laser excited x-ray sources, imaging, and plasma diagnostics.
Next Generation Echelle Spectrometer for Optical Emission SpectroscopyThe SPECTRAL Industries IRIS echelle spectrometer features a combination of large bandwidth and high spectral resolution. It is ideal for Optical Emission Spectroscopy (OES), astronomy, and time-resolved fluorescence. Its gating below 100 ns is...
Timegated Raman Technology for MetallurgyTimegated Raman spectroscopy is suitable for online measurements for nitric and sulfuric acid quantification. It has many advantages compared to conventional acid quantification methods., for example, it is fast, only a minimal amount of sample...
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