New systems are required for optical limiting against broadband laser pulses. We demonstrate that the association of non-linear scattering from single-wall carbon nanotubes (SWNT) and multiphoton absorption (MPA) from organic chromophores is a promising approach to extend performances of optical limiters over broad spectral and temporal ranges. Such composites display high linear transmission a...

A simple colorimetry-based printer calibration technique is described. The objective of this technique is to adjust the printed color to provide improved reproduction of CRT images that is good enough for most applications and easy to implement. It is based upon a one-dimensional look-up table for tone reproduction and a 3-by-3 matrix transformation for accurate hue reproduction of the additive...

The trans-lycopene content of fresh tomato homogenates was assessed by means of the laser photoacoustic spectroscopy, the laser optothermal window, micro-Raman spectroscopy, and colorimetry; none of these methods require the extraction from the product matrix prior to the analysis. The wet chemistry method (high-performance liquid chromatography) was used as the absolute quantitative method. An...

The aim of this study was to device in house a suitable absorption filter for colorimetric analyses. An absorption filter was so constructed using 40% CuSO4.5H2O solution in 8M HCl (w/v) in glass support of 2mm internal diameter. The filter was found to have a nominal wavelength of 540±0.92nm, spectral bandwidth of 41±0.82nm and a peak transmittance of 36±0.40%. The filter offered a sensitivity...

Abstract The aim of this study was to evaluate color characteristics in wood samples from Acacia mangium a homogeneous plantation Bahia state, northeast Brazil, and also analyze the influence anatomical section radial position trunk on response contribute information for best use wood, such as, example, optimization performance pieces sawmill through most acceptable aesthetic form by final cons...