Optical Sensors: Instrumentation, Measurement and Metrology

Dear Colleagues,

Optical sensors are physical devices based on the use of measurable variations in some characteristics such as direction, polarization, luminous intensity (radiation energy: W/m²), interference and diffraction and spectral statistical properties, among others. Their construction materials comprise those used in the optical range, which are embodied in lenses, prisms, optical fibers, mirrors, optical surfaces and interfaces and electro-optic components. These operate in a broad spectral range: near-UV (down to vacuum UV), visible and mid-infrared, where the physical laws and their formulations are commonly applied. However, this range is expanding its boundaries with the extension to nano-metric meta-materials that exhibit novel phenomenology, reaching into the soft X-ray region and into the far infrared, microwaves and radio waves. Additionally, materials with periodic and transducer structures may be employed as optical elements. All of them can be incorporated into the configuration of devices nowadays recognized as optical sensors.

Optical sensors currently have an impact on physic-chemical methodology, the environment, manufacturing and industrial processes, healthcare (biomedicine and sanitation), aerospace, automotive, security, architecture and civil engineering, among others. Furthermore, the configuration of optical sensors in networks makes them suitable for incorporation into the IoT, and the use of AI resources brings them into the realm of big data.

Dr. Eusebio Bernabeu
Dr. André Espinha
Guest Editors

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