Photonics Spectra | Optics, Lasers, Imaging | News, Products, Events
WEBPhotonics Spectra is a global photonics resource and magazine with news, products, research, and applications covering optics, lasers, imaging, and sensing.
Fiber Optics: Understanding the Basics - Photonics
WEBPrinciples Optical materials are characterized by their index of refraction, referred to as n. A material’s index of refraction is the ratio of the speed of light in a vacuum to the speed of light in the material. When a beam of light passes from one material to another with a different index of refraction, the beam is bent (or refracted) at the interface (Figure 2).
Thermal Imaging Takes the Temperature of New Applications
WEBMotion blur is not the only type of blur that occurs in thermal imaging. Since the contrast in a thermal image is caused by changes in temperature, most thermal images appear blurry. This blur is not an effect of focus or the lack thereof. It is a function of physics — thermodynamics, to be more precise.
Hyperspectral and Multispectral Imaging | Features | Apr 2020 ...
WEBHyperspectral and multispectral imaging are used in agriculture to monitor the health of fields across a broad range of the electromagnetic spectrum. In typical machine vision applications, the illumination used and captured by the sensor is from roughly 400 nm (violet) to 700 nm (dark red) (Figure 1). The light is often collected with imaging ...
Lasers: Understanding the Basics | Lasers | Photonics Handbook ...
WEBOver 60 years have passed since the first demonstration of a laser in 1960.After the initial spark of interest, lasers were for a while categorized as “a solution waiting for a problem,” but bit by bit, the range of their applications has expanded to encompass fields as diverse as DNA sequencing, consumer electronics manufacturing, or freezing the motion of …
General Reference - What Is Photonics?
WEBPhotonics Media Editors. Photonics is the study of light and other types of radiant energy whose quantum unit is the photon. The impact of photonics on research, technology, navigation, culture, astronomy, forensics, and health care have helped shape the 20th century, and now, in the 21st century, photonics continues to play a vital role in the ...
Common Infrared Optical Materials and Coatings: A Guide to
WEBThe optical materials selected for an optical system depend upon the application, the required system performance and the environment in which the system is to perform; thus the materials’ optical, mechanical, thermal and thermo-optic properties must be taken into account. There are three major bands that are worked with when optical systems are …
Optical Components: Finding Your Way Through the Maze
WEBBroadband AR coatings are multilayer coatings that have a very low reflectance over a broad spectral range. Compared with single-layer MgF 2 coatings over similar wavelength regions, broadband coatings typically reflect three to four times less light. They are slightly more sensitive to angle of incidence than single-layer coatings, but they can be …
How Newton’s Prisms Fueled a Spectrum of Spectroscopy …
WEBAccording to BCC Research, the global market for spectroscopy equipment is on track to reach more than $16 billion by 2023. The market encompasses a variety of techniques, ranging from absorption to Raman spectroscopy, and it has enabled applications in end markets including research, industry, and biotechnology.
Light-Emitting Diodes: A Primer | Light Sources - Photonics
WEBLight-Emitting Diodes: A Primer. Light-emitting diodes (LEDs) are semiconductors that convert electrical energy into light energy. The color of the emitted light depends on the semiconductor material and composition, with LEDs generally classified into three wavelengths: ultraviolet, visible, and infrared.
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