Optical Monitoring Articles

  • Understanding Laser Classifications and Output Levels

    Mainstream, low-powered lasers that emit continuous wave beams are harmless to humans. However, there are some lasers that can cause serious damage to one’s skin and eyes. To educate and protect people from using such lasers incorrectly – in a way that could cause injury – regulatory institutions have created a classification system that establishes the level of damage that the ...


    By Larson Electronics LLC

  • Distributed Measurements Unlock the Future of Design

    The next generations of materials and design will require sensing technologies that can monitor beyond the scope of point sensors such as thermocouples and strain gauges. New sensing platforms based on optical fibers can obtain spatially continuous, real time data, giving developers detailed insight across broad areas into how their materials and designs behave. Such systems also can sense ...


    By Sensuron

  • BugLab Visits The MiL

    The MiL was recently visited by Dr. Martin Debreczeny, Ph.D. and co-founder of BugLab, LLC. Dr. Debreczeny brought with him BugLab’s BE2100(R) Biomass Monitor, which is a non-invasive optical monitoring system that is designed to measure biomass growth from a wide variety of glass vessels and stainless steel vessels with viewing ...

  • Spin–orbit coupling and optical detection of spin polarisation in triangular graphene quantum dots

    We present a theory of the effect of spin–orbit coupling on optical properties of triangular graphene quantum dots (TGQD). TGQDs with zigzag edges exhibit a degenerate band of states at the Fermi level. For the charge neutral TGQD, the shell is expected to be half–filled by spin polarised electrons leading to finite magnetisation. Using four–band tight–binding and effective Kane–Mele models, we ...


    By Inderscience Publishers

  • Characterisation of potassium bromide loaded with dysprosium fluoride nanocrystals for neutron detection

    We explore a novel concept of passive optically–enabled detection of thermal neutrons that exploits transmutation of 164Dy into 165Ho. The concept relies on significant differences in optical properties of Dy and Ho and on our ability to find the most sensitive optical method of differentiating between Dy and Ho. While the concept ...


    By Inderscience Publishers

  • Small is Beautiful - Case Study

    The versatility and cost savings to be gained from miniaturised optical gas measurement systems. To reduce system costs in the field of optical gas measurement there is an ongoing trend for miniaturisation. One key element for optical gas detection is an IR-source providing a high and stable optical output power, based on low electrical power consumption. Optical stability can be achieved ...


    By Axetris Ag

  • Fibre optic sensors as a non–destructive tool for structural monitoring

    Structural monitoring is a diagnostic tool for detection of defects/damages and for scheduling maintenance operations. It is essential to determine the safety of the structures by Non–Destructive Testing (NDT) for evaluation of strength/integrity. This assessment is required for the repair, rehabilitation and life extension of the structure. Fibre Optic Sensors (FOS) are attractive sensing ...


    By Inderscience Publishers

  • Inactivation of E. coli bacteria by atmospheric dielectric barrier discharge

    Dielectric Barrier Discharge (DBD) plasma generated in open air under atmospheric pressure using a homemade pseudo–pulsed high voltage power supply has been used to inactivate Escherichia coli (E. coli). Effects of DBD electrodes gap, applied high voltage and plasma time treatment variations on microorganism's inactivation efficiency have been investigated using optical density measurements and ...


    By Inderscience Publishers

  • In-Situ® Rugged Dissolved Oxygen (RDO®) Sensors Use the Latest Advancements in Optical Measurement Technology

    Dissolved oxygen (DO) is one of the most important parameters monitored when evaluating water quality, aquatic biology, and other environmental and industrial processes. The In-Situ Rugged Dissolved Oxygen (RDO) Sensor measures DO using the latest advancements in optical measurement technology. Water quality professionals will benefit from In-Situ Inc.'s investment in new product development. By ...


    By In-Situ, Inc.

  • In-situ quality monitoring station in Lower Saxony

    Background 'Duemmer' is a shallow lake in the south-west of Lower Saxony; through the lake flows the river 'Hunte'. The catchment area spans 426 km2. With a surface of 12.4 km2 and an average depth of 1.1 m there is a water volume of approx. 14 million m3. Large parts of the lakeside are a nature reserve and the lake is a popular local recreation area. The lake suffers from strong nutrient ...


    By OTT HydroMet

  • Single photons from single CdSe quantum dot embedded in ZnSe nanowire

    We report the growth of ZnSe nanowires and nanoneedles using molecular beam epitaxy (MBE). Different growth regimes were found, depending on growth temperature and the Zn-Se flux ratio. By employing a combined MBE growth of nanowires and nanoneedles without any postprocessing of the sample, we achieved an efficient suppression of stacking fault defects. This is confirmed by transmission electron ...


    By Inderscience Publishers

  • Relationship between Particulate Matter measured by Optical Particle Counter and Mortality in Seoul, Korea, during 2001

    This study was performed to examine the relationship between particulate matter exposure and mortality in Seoul, Korea, during the year 2001. Particulate matter data were collected using an optical particle counter (OPC) and national monitoring stations in Seoul. The size-resolved aerosol number concentrations of particles 0.325 μm in diameter and mass concentrations of PM10 ...

  • Chemical sensing with nanowires using electrical and optical detection

    Chemical nanosensors based on inorganic nanowires hold promise for the extremely sensitive, direct detection of pollutants, toxins and biomolecules on platforms small enough to be integrated on optoelectronic chips or even deployed in living organisms. This paper discusses two approaches to nanowire-based chemical and biological detection. First we review the development of electrically-driven ...


    By Inderscience Publishers

  • Optical DO Sensors Opening Doors to Online Aeration Control

    BACKGROUNDThe benefits of using online, automated control of aeration systems using dissolved oxygen (DO) sensors are well known in the industry and have been widely documented (e.g. Olsson et al, 2005). In most wastewater treatment facilities using activated sludge, the electricity provided to the aeration system is one of the most significant operating costs and a good control system can help ...

  • Innovation in the "Baby Bell" companies: a comparative longitudinal analysis

    The worldwide trend of deregulating monopolistic service industries, and in particular established telecommunication companies, raises a major issue: how do the former protected and implementation-minded companies compete with the new entrepreneurial entrants? How are these companies building their innovation capabilities? This paper addresses the question: how is innovation associated with ...


    By Inderscience Publishers

  • Computer-supported quality safeguards in the product development process

    In this paper, a new quality cycle for the product development process is presented. In design, a product element is constructed and described with ideal geometry and tolerance information. A prototype will be manufactured. The inspection data recorded with a measuring machine with tactile or optical sensors can be used to generate a real geometry. Based on an approach of the 3D tolerance zone, ...


    By Inderscience Publishers

  • Evaluation of the FCI Fiber Optic Chemical Sensor (FOCS)™ for BTEX in Water Against EPA`s Method 8020

    The patented fiber optic chemical sensor (FOCS)™ technology is based on the principle of modulation of light transmitted along an optical fiber. A portion of the cladding of a small segment of the optical fiber is replaced by a proprietary chemical coating, which changes the refractive index in the presence of hydrocarbons. This change in the index is proportional to the concentration of ...


    By PetroSense, Inc

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