A fibre-optic scalar irradiance microsensor: application for spectral light measurements in sediments
نویسندگان
چکیده
منابع مشابه
Light penetration and light intensity in sandy marine sediments measured with irradiance and scalar irradiance fiber-optic microprobes
Fiber-optic microprobes for determining irradiance and scalar irradiance were used for light measurements in sandy sediments of different particle size. Intense scattering caused a maximum integral light intensity [photon scalar ~rradiance, E"(400 to 700 nm) and Eo(700 to 880 nm)] at the sediment surface ranging from 180% of incident collimated light in the coarsest sediment (250 to 500 pm grai...
متن کاملEstimating spectral irradiance from measurements in seven spectral bands
Accurate measurement and characterisation of fluctuations in the irradiance environment is important for many areas of optical remote sensing. This paper reports a method of estimating spectral irradiance over the VNIR region (400 1100nm) from the radiance of a calibrated reference panel, measured in seven narrow (10nm) spectral bands. Earlier work established the potential for estimating spect...
متن کاملNitric oxide microsensor for high spatial resolution measurements in biofilms and sediments.
Nitric oxide (NO) is a ubiquitous biomolecule that is known as a signaling compound in eukaryotes and prokaryotes. In addition, NO is involved in all conversions of the biogeochemical nitrogen cycle: denitrification, nitrification, and the anaerobic oxidation of ammonium (Anammox). Until now, NO has not been measured with high spatial resolution within microbial communities, such as biofilms, s...
متن کاملA simple fiber-optic microprobe for high resolution light measurements: application in marine sediment.
A fiber-optic microphobe is described which is inexpensive and simple to build and use. It consists of an 80-micrometers optical fiber which at the end is tapered down to a rounded sensing tip of 20-30-micrometers diameter. The detector is a hybrid photodiode/amplifier. The probe has a sensitivity of 0.01 microEinst m-2 s-1 and a spectral range of 300-1,100 nm. Spectral light gradients were...
متن کاملThermal Microsensor for Application in Radiometer
In this paper presents two microsensors structures compatible with microelectronic technologies that are analyzed for application in radiometers. The first structure is formed by one resistor that is made by doping a monocrystalline silicon substrate with boron. The second is a polysilicon resistor doped with phosphorous, over a silicon dioxide (SiO2). The analysis is made by mathematical model...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: FEMS Microbiology Letters
سال: 1992
ISSN: 0378-1097,1574-6968
DOI: 10.1111/j.1574-6968.1992.tb04816.x