Sensors and detectors

Thermal Infrared hyperspectral imaging for the detection, Identification, and quantification of Industrial stack gas emissions

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Thermal infrared hyperspectral imaging is well suited for the detection, identification, and quantification of industrial stack gas emissions. This application note describes a measurement campaign performed at the Port of Rotterdam with the Telops Hyper-Cam, a commercial high-performance, FTIR-based hyperspectral imaging instrument. Principles of gas detection, quantification, and identification are discussed and computed mass-flow rate results are presented from data acquired at a commercial alkene production facility.

Technology leaps in quantum sensing - Advances in nano magnetometry using tailored electronics and fast-switchable lasers

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Taking advantage of collective quantum effects has enabled the so-called first quantum revolution in the 20th century for technologies such as nuclear magnetic resonance spectroscopy, magnetic resonance imaging, and the development of transistors, LEDs, solar panels, and lasers. Today, amid the second quantum revolution new sensing schemes offer higher sensitivities and better resolution thanks to the possibility to detect and control individual quantum states in microscopic systems like atoms, quantum dots, or color centers.


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High progress in optoelectronics technology, especially designed for infrared wavelength region (IR), is observed. The use of various spectroscopic methods allows to obtain detailed information on the chemical analysis of the leaking gas. Each of the spectroscopy methods is dedicated to different types of concentration measurements. We encourage you to read the article that explains and presents laser gas leak detection with infrared.

Artist’s impression of the Solar Orbiter, with the Spice spectrometer (ESA/ATG medialab)

Spectroscopy to probe the Sun in greater detail

A proposal to use a high-resolution multi-slit spectrometer to obtain high-cadence observations of the Sun’s atmosphere, the corona, has been selected by Nasa

Position-sensing detectors characteristics

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Silicon photodetectors are commonly used for light power measurements in a wide range of applications such as bar-code readers, medical imaging, spectroscopy, and laser printers.  There is another function, however, which utilises the photodetectors as optical position sensors. They are widely referred to as Position Sensing Detectors (PSDs). The applications vary from human eye movement monitoring, 3D modelling of human motion to laser, light source, and mirrors alignment.

Focuslight announces eye-safe wide angle diffuser for lidar and 3D sensing applications

Focuslight technologies, a global provider of high power diode lasers and micro optics, announced the LIMO Wide Angle Diffuser at SPIE Photonics West 2020. Designed for automotive LiDAR and 3D sensing applications, the LIMO Wide Angle Diffuser is a glass refractive optical element (ROE) with the ability to disperse laser light in one direction up to a full illumination angle, ranging from a few mrad up to 150 degrees. When combined with a second functional surface, the light can also be shaped at any desired angle in the other direction.

Far field pattern of UV-C laser projected onto a fluorescent screen (Image: Asahi Kasei Corp. and Nagoya University)

Scientists develop laser diode that emits 'world's shortest lasing wavelength'

Scientists have designed a laser diode that emits what they say is the shortest-wavelength ultraviolet light achieved to-date, with potential applications in disinfection, dermatology, and the analysis of gas and DNA


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