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Freeform Surfaces Present Opportunities and Challenges Oct 2, 2020 — The classic example of a freeform surface in ophthalmic applications is the varifocal lens commonly used in eyeglasses. Due to the normal aging process, the eye’s ability to adapt between near and far slowly decreases. This leads to discomfort, especially at close range. The great advantage of varifocal lenses is that they combine different strengths in one lens. In contrast to single-vision lenses, they allow for a combination of three vision ranges: distance, intermediate, and near vision....
Photonics Spectra, Nov 2020
Structured Photons Open Door to High-Dimensional Quantum Gates Sep 30, 2020 — Quantum communication offers unparalleled security and is arguably the most advanced application of quantum information science. Its fundamental strength derives from the fact that single photons can transmit information. While all observation and...
Photonics Spectra, Nov 2020
Ultrafast Lasers Probe the Fingerprint Region Sep 29, 2020 — Twenty years ago, spectroscopists typically relied on a toolbox of analytical techniques to collect the data needed to make measurements. From gas chromatography and mass spectrometry to high-performance liquid chromatography and nuclear magnetic...
Photonics Spectra, Nov 2020
Earth Imaging Reveals the True State of Land, Sea, and Air Sep 23, 2020 — Stephen Hawking once said, “Remember to look up at the stars and not down at your feet.” This deep-seated urge to make sense of where we came from and to try to understand what makes the universe tick is a defining aspect of what makes...
Photonics Spectra, Nov 2020
Superresolution Microscopy Enhances Biomedicine Sep 4, 2020 — Superresolution optical microscopy — a technology that enables the acquisition of fluorescent micrographs of samples with a resolution well below the optical diffraction limit of ~250 nm — is rapidly evolving. Several methods have been developed...
EuroPhotonics, Dec 2020
Laser-Processed Composites Help Harvest Biofuels Sep 4, 2020 — Ever-increasing environmental concerns have placed biofuels in the spotlight of research and development efforts in search of a clean energy solution. In this context, microalgae biomass harvested with pulsed lasers is a viable alternative for the...
EuroPhotonics, Dec 2020
Biological Systems Inspire Image Preprocessing Solutions Aug 31, 2020 — Data, as the saying goes, is king. But as any chess player knows, the king without his minions is hamstrung by limited mobility. The ubiquitous deployment of CMOS and CCD imagers across a range of industries and applications has generated an...
Vision Spectra, Dec 2020
New Tools Promise the Next Big Thing for Quantum Sensing Aug 31, 2020 — Sensors form an important foundation for many everyday devices, including microphones, CCD cameras, and touch sensors in smartphone displays. Moreover, sensors play a key role in technological progress, in general, as illustrated by the old adage...
Photonics Spectra, Oct 2020
Member Exclusive
Drones Deliver a Fresh Take on Airborne Imaging Applications Aug 27, 2020 — Initially swooping in to provide aerial shots in big-budget movies, UAVs — or drones, in consumer parlance — are now bringing aerial cinematography technology to other applications. Drone-mounted imagers are helping to inspect infrastructure,...
Photonics Spectra, Oct 2020
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How Vision Systems Can Deliver More than the Sum of Their Parts Aug 25, 2020 — The use of both 3D-imaging technology and smart cameras is expanding the flexibility and capabilities of machine vision systems. Integrating these elements with advanced image preprocessing and intelligent software can further enable automated...
Photonics Spectra, Oct 2020
Optical Frequency Combs Enhance Hyperspectral Imaging Aug 24, 2020 — An optical frequency comb is an optical source characterized by a spectrum consisting of evenly spaced frequency lines, known as teeth. This Nobel Prize-winning technology has become a reference tool for optical frequency metrology and spectroscopy...
Photonics Spectra, Oct 2020
Coherent Sensing Holds Promise for Machine Vision Aug 19, 2020 — Supply chain disruptions during the COVID-19 pandemic have been a wake-up call for most, resulting in the acceleration of the onshoring trend started by the U.S.-China tensions. Offsetting higher wage structures with automation is key to a sustained...
Vision Spectra, Sep 2020
Laser Direct IR Imaging Projects Microplastics Analysis Aug 13, 2020 — Contamination of soil, air, and drinking water by microplastics is a growing focus of attention around the world. Environmental agencies are increasing the monitoring of waterways, and governmental bodies are seeking to protect these resources....
BioPhotonics, Oct 2020
Raman Imaging Opens View to Diagnosis and Discovery Aug 13, 2020 — By revealing the chemical composition of samples, Raman microscopy has proved to be useful in many fields, including medical diagnosis, materials science, cosmetics, and food science. For the researcher, clinician, or engineer, it is most useful...
BioPhotonics, Oct 2020
3D Thermophotonic Imaging Informs Biomedicine Aug 13, 2020 — Imaging plays an important role in disease prevention, diagnosis, and treatment, and new technologies are helping to overcome many limitations to resolution and depth. Early diagnosis of diseases can alter the path of treatment and its efficiency...
BioPhotonics, Oct 2020
Portable Microscopy Leverages Advancements in Electronics and Computing Aug 12, 2020 — Spurred by Moore’s law, the principle that the number of transistors on a microchip doubles every two years, the miniaturization of electronic components has resulted in optical devices shrinking as well. While etendue (a characteristic of light and...
BioPhotonics, Oct 2020
Optimal Defect Detection with Deep Learning Aug 5, 2020 — Technologies based on artificial intelligence are used in many industries today. For example, deep learning methods based on convolutional neural networks are used in machine vision, making it possible to detect and localize objects and defects in a...
Vision Spectra, Sep 2020
Tiny Quantum Effects Promise Big Impact on Future Instruments Aug 4, 2020 — While the quantum world may seem abstract and remote from day-to-day life, researchers are discovering that quantum effects such as photon entanglement could improve the performance and precision of everyday tools. Advancements in quantum metrology...
Photonics Spectra, Sep 2020
Islam’s Golden Age Sparks a Spectrum of Optical Knowledge Aug 4, 2020 — The history of optics traces back to the primitive lenses of the ancient Egyptians and Mesopotamians, the rudimentary logical conjectures of the ancient Greek philosophers, and the simple geometrical optics of figures such as Euclid, Ptolemy, and...
Photonics Spectra, Sep 2020
Antireflection Coatings for High-Power Fiber Laser Optics Jul 31, 2020 — High-power kilowatt-level fiber lasers operating between 1.0 and 1.1 µm find frequent use in macro-materials processing applications, such as cutting and welding metal sheets. The nature of these applications requires laser optics to perform...
Photonics Spectra, Sep 2020
Member Exclusive
The Fight for First Light: Extremely Large Telescopes Jul 31, 2020 — The 2020 U.S. Decadal Survey on Astronomy and Astrophysics, a type of survey in which astronomers set priorities to guide federal budgets during the next 10 years, is in the process of listing its most important projects. Asteroid detection and Mars...
Photonics Spectra, Sep 2020
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Vision Systems Perform Vital Checks on Medical Devices Jul 30, 2020 — Medical device manufacturing encompasses products that go inside the body, such as catheters and artificial joints. Other manufactured goods in this category include external devices that measure vital signs and other medically important parameters,...
Vision Spectra, Sep 2020
Diamond Raman Lasers Offer Multifaceted Potential Jul 28, 2020 — Ever since Ted Maiman used a flash-pumped synthetic ruby crystal to generate the first coherent light source in 1960, the development of optical gain media has become a critical area of study for many science and engineering fields. While...
Photonics Spectra, Sep 2020
Bringing Habitable Planets to Light with Faster Adaptive Optics Jul 28, 2020 — At the heart of every imaging system, from endoscopes to extremely large telescopes, is the pursuit of a perfect image, extracting as much information as possible from every acquired photon. No matter how well designed the system, however,...
Photonics Spectra, Sep 2020
Digital Age Sees New Demand for the Venerable Conoscope Jul 28, 2020 — After languishing for the first century of their existence, conoscopes have become essential to the production of consumer products in an increasing number of industries. What began in 1911 as simple scientific curiosities designed for liquid...
Photonics Spectra, Sep 2020
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