Abstract:
La présente invention se rapporte à un procédé de mesure de la réflectance diffuse uniforme R OBJ (λ) en au moins un point d'un objet (30) à l'aide d'un dispositif (10) comportant un moyen (11) apte à émettre des illuminants de couleur exprimés sous la forme de flux lumineux et un capteur électronique d'images couleurs (12). La présente invention se rapporte également à un dispositif (10) comportant un moyen (11) apte à émettre des illuminants de couleur sous la forme de flux lumineux de couleurs et un capteur électronique d'images couleurs (12), de mesure de la réflectance diffuse uniforme R OBJ (λ) en au moins un point d'un objet (30) placé dans une zone se trouvant en face de et sensiblement perpendiculairement audit moyen (11) apte à émettre des couleurs et se trouvant dans le champ de vision dudit capteur électronique d'images couleurs (12) et étant soumis à un illuminant extérieur sous la forme d'un flux lumineux extérieur environnant (40) noté I ext (λ), constant et inconnu.
Abstract:
Simulador solar de espectro variable para caracterización de sistemas fotovoltaicos. Permite obtener un espectro ajustado al espectro solar, tanto si éste es un espectro estándar o un espectro real ajustado a unas condiciones locales de irradiación. También permite la reproducción de las características espacio-angulares del sol. Comprende una fuente luminosa de amplio espectro cuyo flujo sale a través de una apertura, un sistema óptico que colima dicha fuente primaria, un sistema que dispersa el haz cromáticamente, un sistema óptico que forma imagen de la fuente primaria dispersada en una cierta posición, dónde se coloca, una máscara espacial que permite filtrar espectralmente la irradiancia recibida, un sistema óptico que captura el espectro filtrado y lo reconduce, mezcla y concentra en una fuente secundaria con las características espectrales, angulares y espaciales buscadas, un sistema óptico que colima dicha fuente secundaria de forma que reproduzca las características angulares del sol y un sistema de control.
Abstract:
A spectroscope designed to utilize an adaptive optical element such as a micro mirror array (MMA) and two distinct light channels and detectors. The devices can provide for real-time and near real-time scaling and normalization of signals.
Abstract:
A spectroscope designed to utilize an adaptive optical element such as a micro mirror array (MMA) and two distinct light channels and detectors. The devices can provide for real-time and near real-time scaling and normalization of signals.
Abstract:
A diode-pumped solid state laser (4) produces an output of pulses of laser light which is transmitted through a microstructured optical fibre where it undergoes non-linear optical effects so as to produce pulses of continuum radiation. These pulses of continuum radiation are spatially separated by a diffraction grating (10) and then selectively modulated by a spatial like modulator (14) so as to generate pulses of tuned radiation having a tuned spectral profile. This is subject to feedback control and is useful for fluorescence imaging, including fluorescence lifetime imaging. The feedback controlling operation of the tuned radiation can be used to optimise one or more desired outcomes of an experiment or procedure.
Abstract:
Methods for generating a customized spectral profile, which can be used to generate a corresponding filter. A trial source spectrum is generated. An uncorrected lamp source spectrum is determined. One or more optical indices are calculated using the trial source spectrum or the uncorrected lamp source spectrum, and one or more of the optical indices are optimized by varying the trial source spectrum to generate the customized spectral profile.
Abstract:
A collector (202) captures light from source images as a field of pixels, a color analyzer (292) analyzes a proper subset (420) of the field to produce a plurality of color values, and a cosmetic analyzer then uses the color values to produce a cosmetic color determination. Another aspect of the present invention comprises a window having a light passage area, a color calibration region that is not coextensive with the light passage area, and a detectable product identification region. The window may also contain a mechanism that tends to preclude multiple uses. A third aspect of the present invention is a system that combines the collector, the color analyzer, the cosmetic analyzer, and window.
Abstract:
A spectral instrument including a light source configured to produce a light beam, the light beam comprising a plurality of wavelengths, and the light beam being about collimated or pseudo-collimated. The spectral instrument also includes a spectral dispersion device in optical communication with the light source. The spectral instrument also includes a screen disposed in the optical path after the spectral dispersion device. The screen comprises a material configured to be substantially opaque to at least some of the plurality of wavelengths. The screen is sized and dimensioned to at least partially block selected ones of the plurality of wavelengths. The screen is movable with respect to an axis of the screen. The spectral instrument also includes an imaging lens disposed in the optical path and disposed either after the screen or before the screen.