منابع مشابه
Agile Spectrum Imaging: Programmable Wavelength Modulation for Cameras and Projectors
We advocate the use of quickly-adjustable, computer-controlled color spectra in photography, lighting and displays. We present an optical relay system that allows mechanical or electronic color spectrum control and use it to modify a conventional camera and projector. We use a diffraction grating to disperse the rays into different colors, and introduce a mask (or LCD/DMD) in the optical path t...
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In this study, the effect of light wavelength on growth rate and lipid production of Synechocystis was investigated. Continuous cultivation system was used to have uniform cell density and avoid self-shading in order to obtain more precise results. Based on previous studies, red light is more efficient than other colors in the visible spectrum for cultivation of Synechocystis; however, the opti...
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We demonstrate that external cavity diode lasers with large mode-hop-free tuning ranges ~up to 80 GHz! together with wavelength modulation spectroscopy can be used to study excitonic transitions in semiconductor nanostructures. Such transitions are characterized by homogeneous linewidths typically on the order of a few GHz. Wavelength modulation spectroscopy offers a high signal-to-noise method...
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Copper (Cu) is an essential trace element involved in normal reproduction but its over-exposure may produce some detrimental effects. The aim of this study was to investigate the effects of purslane on copper sulfate poisoning on liver structures changes. Twenty eight wistar rats were randomly allocated to four treatment groups. Group I) Control, Group II) Copper sulfate (200 mg/kg bw were appl...
متن کاملWavelength modulation spectroscopy: combined frequency and intensity laser modulation.
A theoretical model of wavelength modulation spectroscopy that uses a laser diode on a Lorentzian absorption line is presented. This theory describes the general case of a current-modulated semiconductor laser, for which a combined intensity and frequency modulation with an arbitrary phase shift occurs. On the basis of this model, the effect of several modulation parameters on the detected sign...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 1970
ISSN: 0031-9007
DOI: 10.1103/physrevlett.25.1486