![]() These coatings generally take the form of a layer of metal, to create a mirror, or of layers of transparent dielectric materials which rely on interference effects to increase or reduce the reflectivity of a surface.ĭielectric coatings are used for antireflection coatings on eyeglasses, camera lenses, lasers, and microscopes. Thin film coatings are often applied to materials to modify how light interacts with the surface. (Anti)reflection Coating Efficiency Measurements The Ossila Optical Spectrometer can measure the spectrum of light from the UV-A band to the near infrared. The wavelength of a laser, meanwhile, determines how far signals can travel when it is used for fiber optic communication.Ĭharacterising light sources is a simple process, providing that your optical spectrometer operates in the desired range. The wavelength spectrum of the emitted light determines the suitability of an artificial light source (such as fluorescent tubes, halogen bulbs, lasers, and broadband white light or UV LEDs) for a given application. Indoor lighting generally requires a wide range of wavelengths and LEDs for colour displays should emit chromatically 'pure' light at a known wavelength. Characterisation of LEDs, Lasers, and More Each of these measurements can reveal a large amount of information about the material or structure in question, whether that be a thin film on a substrate, a 2D material, a chemical or electrochemical solution, a living cell or other biological material, or a distant star. You can use them to measure the transmission, reflection, scattering, or absorption of light on a sample as well as electroluminescence or photoluminescence from an emitter. Optical spectrometers have a wide range of applications across physics, chemistry, and biology. These are usually defined by the range of the electromagnetic spectrum that they cover, but can also be distinguished by their optical design, by their intended application, or by specific features that they offer. The name 'optical spectrometer' is a broad term, as there are a number of different types of optical spectrometer. This is known as optical spectroscopy (or spectrometry). Optical spectrometers are the most prevalent type of spectral device. Optical spectrometers can be used to study how light interacts with, or is emitted by, a sample. Other types of spectrometer include mass spectrometers and nuclear magnetic resonance (NMR) spectrometers, but unless otherwise stated, 'spectrometer' is generally used to refer to optical devices. Wide range optical spectrometers may also extend into the near-infrared and UV regions. The spectral range measured varies from device to device depending on the design of the spectrometer and its intended use, but most operate around the visible part of the spectrum. The oldest and most common type of spectrometer, the optical spectrometer, measures the properties of light over a defined range of the electromagnetic spectrum. The study of this data is known as spectroscopy.ĭifferent types of spectrometer measure different characteristics. The Ossila Optical Spectrometer is a compact USB Vis-NIR spectrometer which can measure the spectrum of light (and how it interacts with matter) from 320 nm to 1050 nmĪ spectrometer is a device that measures a continuous, non-discrete physical characteristic by separating it into a spectrum of its constituent components. ![]()
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