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SPECTROSCOPY WHITE PAPERS
Polarization Metrology of Anisotropic MaterialsFull Mueller matrix measurements allow for elimination of ambiguity and a fuller understanding of polarization metrology. The Exicor® 150XT system offers complete Mueller matrix measurement from 350 nm to 800 nm with automated sample translation and optional tip-tilt measurements. Integration times as low as 0.01 seconds for measurements of the Mueller matrix to 0.001. Partial Mueller matrix systems can attain measurements of 8 Mueller parameters with precision of 0.0001.
Are You Facing any Problems Securing Optical Parts?You need just a couple of pieces for trial. You need to achieve an exact specification. You need to keep the same quality in every order. You cannot find the best fit material for your design. You always need the material certificate. You need to...
Diamonds are Forever: Using NIR to Find the FakesCubic zirconia is easy and inexpensive to make and the diamond industry has long considered it an existential threat. Consider a diamond crusted band, what if some of those diamonds are actually cubic zirconia? Most people would never be able to...
Industrial Equipment Failure Analysis Using FT-IR Microscopic TechniquesThis work demonstrates that FT-IR microscopy analysis is capable of determining the cause of failures of many different pieces of industrial equipment. This analysis can then allow the user to take preventative action measures in order to improve...
Curing of an Optical Adhesive by UV Irradiation by DSCOptical adhesives are used in many industries such as semiconductors and chip manufacturing where solvents are undesirable. Power compensated instruments are the best choice for fast analysis of the curing profile and measurement of the energy of...
Characterization of Advanced Semiconductor Materials and Processes with Nanoscale IR SpectroscopyThis application note demonstrates the successful application of Tapping AFM-IR to distinguish the chemical footprints of several nanoscale lithographic patterns consisting of complex molecular assemblies with excellent spatial resolution of 4 nm....
Trusted Glass Measurements for Better Product DevelopmentThe PerkinElmerUL270 integrating sphere is a unique accessory that allows new accuracy to be achieved in the measurement of light-diffusing materials and adequately solves the various measurement problems involved in measuring transmittance and...
Near-Field Scanning Optical Microscopes: Capabilities and ApplicationsNSOM techniques and instrumentation have evolved to become vital tools for material characterization, providing high-quality data and continually expanding utility, spot-on accuracy, adaptability, and exceptionally high definition. This article...
Raman Spectroscopy as a Tool for Studying Polymer Phase TransitionsSemicrystalline polymers, such as polyethylene, are the largest group of commercially produced plastics. Heating and cooling between phase transitions is used in industry for shaping these polymers into their final product. A phase transition occurs...
Automated Solutions for SAE Standard HUD MeasurementHead-up display (HUD) technology is one of the largest growth areas in the automotive market, and standard measurement criteria are rapidly being defined to evaluate augmented projections for visual quality and safety of HUD systems. This paper...
Fractional Pixel Method for Improved Pixel-Level Measurement and Correction (Demura) of High-Resolution DisplaysAs display resolutions increase, imaging systems are challenged to continue to provide accurate pixel-level measurements while applying increasingly limited relative imaging resolution during single-image analysis (necessary for production...
Methods for Measuring Display Defects and Mura as Correlated to Human Visual PerceptionHuman vision and perception are the ultimate determinants of display quality, however human judgment is variable, making it difficult to define and apply quantitatively in research or production environments. Traditional methods for automated defect...
Using Imaging Colorimeters to Correct OLED, MicroLED, and Other Emissive Displays for Production Efficiency and YieldsImaging colorimeters can improve OLED and microLED display production by ensuring visual quality of displays — measuring brightness and color uniformity at the pixel and subpixel level to correct poorly performing panels and safeguard manufacturing...
The Easy Way to Upgrade Your SpectrometerOptical fiber switches are the perfect solution to analyze different light sources with only one spectrometer. By utilizing multiple channels of the detector system at the same time, the light quality remains high while costs are low. Controlled by...
Multilayer Coating for Extreme Ultraviolet ExperimentsExtreme ultraviolet (EUV) multilayer coatings have been designed and fabricated for many kinds of experiments including high-order harmonics application. In this paper, we present recent results obtained with Ru/B4C, Mo/Si, Zr/Al-Si, SiC/Mg...
“Fingerprint” vs Handheld Raman Applications and the Different Optical Filters That Enable ThemRaman spectroscopy is a powerful non-invasive, non-contact tool capable of identifying molecular constituents of samples. Wavelength selective optical filters are used to block the dominant Rayleigh scattered light and transmit only the Raman...
Discrimination of Cooking Oils Using Raman SpectroscopyIn this application note, Edinburgh Instruments highlights how Raman spectroscopy, in combination with chemometrics, can be used to identify cooking oil adulteration.
PDH Technique with Moku:Lab’s Laser Lock Box — An FPGA-based all-in-one Solution for Laser Frequency LockingThe Pound-Drever-Hall (PDH) technique was first introduced by R.V. Pound, Ronald Drever, and John L. Hall in 1983. It is a widely used method to match the emitting optical frequency of a laser to a Fabry-Perot cavity. PDH locking uses light...
Temperature Dependent Triplet States of BenzophenoneTriplet excited states in molecules and materials play an important role in many practical applications, from phosphorescent pigments to photodynamic therapy, and even photovoltaic solar cells. New materials that exhibit triplet state photochemistry...
Reducing Interference Pattern in Multimode Optical FiberThe spectrographic imaging quality from Integral Field Units (IFUs) in astronomical imaging are limited due to Whispering Gallery Modes (WGM) in multimode optical fibers. Modifications in the production process reduces unwanted interference in...
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...
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...
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...
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