Experiments show that the optical reflectance of a random medium can have a nonmonotonic dependence on wavelength even when its absorption spectrum is flat and its scattering coefficient decreases monotonically with wavelength. Measured at a particular radial distance from the illumination point, the reflectance is almost independent of wavelength over a wide band. The peak wavelength of the re...

Single crystals of nonlinear optical material bis (guanidinium) hydrogen phosphate monohydrate (G2HP) belonging to non centrosymmetric space group P 21c were successfully grown by the slow evaporation method. Optical transmittance and second harmonic generation of the grown crystals have been studied by UV-vis-NIR spectrum and Kurtz powder technique respectively. The transmittance of G2HP cryst...

The reflectance of single crystal LaSrGaO 4 has been measured from ≈ 50 to 40000 cm −1 along the a andc axis. The optical properties have been calculated from a Kramers-Kronig analysis of the reflectance for both polarization. The reflectance curves have been fit using a product of Lorentzian oscillators.

A short review of the recent status of optical biopsy of human skin as a tool for cutaneous tumour detection will be presented. Basically laserand lightinduced fluorescence and diffuse reflectance techniques incorporated in so called “optical biopsy” technique used for skin tissue analysis will be described and some original results and findings from our own investigations will be commented as ...

RESUME The MERIS L2 reflectance of the data product requires over land surface an atmospheric correction for the aerosol effect. For this purpose the determination of aerosol optical thickness will be done by the BAER (Bremen AErosol Retrieval) approach, modified for this type of data product. Validation and application of the retrieval of spectral aerosol optical thickness and its application ...

We report backscattering spectroscopic measurements on individual single-walled carbon nanotubes (SWNTs). The reflectance spectra show geometry-dependent resonant peaks corresponding to optical transitions between Van Hove singularities in the SWNTs' joint density of states. All nanotubes display certain colours as their reflectance spectra demonstrate strong energy dependence. This approach wa...

We studied NbCl5 and ZnMg alloy intercalated graphite compounds using an optical spectroscopy technique. These intercalated metallic graphite samples were quite challenging to obtain optical reflectance spectra since they were not flat and quite thin. By using both a new method and an in situ gold evaporation technique we were able to obtain reliable reflectance spectra of our samples in the fa...

In this paper we have analyzed the ADEOS/POLDER data over Mongolia obtained in June 13, 1997. We estimated aerosol's optical thickness and Ångström exponent from both the reflectance and polarization data at 443 nm for the desert area. Using the atmospheric correction scheme based on the retrieval aerosol optical parameters, we got estimates the surface reflectance form POLDER data at 443, 670,...