visible lasersuv laserssolid-state lasersBy combining stimulated Raman scattering and sum-frequency generation within a single laser system, indeed often within a single resonator, it is possible to achieve frequency conversion over a wide range of output wavelengths, that are useful for a number of...
For instruments employing two lamps, a tungsten or halogen lamp is commonly used for visible light,2 whilst a deuterium lamp is the common source of UV light.2 As two different light sources are needed to scan both the UV and visible wavelengths, the light source in...
visible spectrumAthensGreeceThis work investigates the seasonal and diurnal variation of total spectral transmittance of solar radiation. Such a study dealing with ultraviolet and visible wavelengths (310鈥 575 nm) is carried out in Athens for the first time. The spectral values presented are average...
and new accurate wavelengths can be determined. Fig. 1. A 400 cm −1 region of the spectrum, containing four of the UV lines 2 M. Aldenius and S. Johansson 2 Resonance UV wavelengths for cosmology Laboratory wavelengths and wavenumbers of in total 23 UV lines visible in high-redshift ...
7.2 The spectrum of the sun Visible light and infrared radiation constitute the major fraction of solar radiation reaching the atmosphere of the Earth (Fig. 7-1). Approximately 40 % of the radiation energy is visible light of wavelengths between 400 and 700 nm. Ultraviolet radiation is divided...
Ultraviolet-visible (UV-Vis) spectrophotometry is arguably the most common as well as one of the oldest forms of absorption-based analysis. UV and visible regions of the electromagnetic spectrum are contiguous: UV wavelengths range from 10 to 4000 angstroms; visible wavelengths range from 4000 to ...
Grenfell TC, Warren SG, Mullen PC (1994) Reflection of solar radiation by the Antarctic snow surface at ultraviolet, visible, and near-infrared wavelengths. J Geophys Res 99:18669–18684 ArticleGoogle Scholar Blumthaler M, Ambach W (1988) Solar UVB-albedo of various surfaces. Photochem Photobiol...
Tests at red, green, and UV wavelengths showed that they could significantly discriminate not only the chromatic stimuli that were visible to human observers but also the UV-illuminated patterns that humans could not see. In control ... J Emmerton - 《Perception & Psychophysics》 被引量: 57发...
紫外-可见分光光度法（UV-vis spectrophotometry）Appendix IV A UV visible spectrophotometry Calibration and verification of instruments Because of the influence of environmental factors on the mechanical part of the 1. wavelength, the wavelength of the instrument often varies slightly The instrument shall ...
Various chemimechanical refiner pulps (unbleached, -bleached and pre-yellowed) were irradiated with monochromatic light at selected wavelengths. The change in reflectance at 457 and 557 nm was monitored using UV-VIS reflectance spectroscopy and post-color values were calculated from the reflectance chan...