The Experts below are selected from a list of 309 Experts worldwide ranked by ideXlab platform

Juanning Zhao - One of the best experts on this subject based on the ideXlab platform.

  • Optical loss of photovoltaic modules under Diffuse Light
    Solar Energy Materials and Solar Cells, 2003
    Co-Authors: Antonio Parretta, Pietro P. Altermatt, Haruna Yakubu, F Ferrazza, Martin A. Green, Juanning Zhao
    Abstract:

    The optical behaviour of photovoltaic (PV) modules from different fabrication technologies was investigated under Diffuse Light by a novel characterization method. The optical apparatus, hemispherical/hemispherical reflectometer, allows both reflectance and transmittance measurements under an incident Diffuse Light which simulates the distributed outdoor irradiation from the sky or from the albedo. This paper presents only the configuration for reflectance measurements. The apparatus is provided with a single integrating sphere of 40 cm diameter, which acts as a lambertian source of Diffuse Light and spontaneously collects the Diffuse Light reflected by the sample in the front hemisphere. The hemispherical/hemispherical reflectance, R hh ; expresses the optical loss of the PV device under Diffuse Light, and is obtained by measurements of Light irradiance inside the sphere in correspondence with the sample and with a selected number of standards of Diffuse reflectance. The best optical performances, in terms of optical loss, were achieved by modules realized with blue mono-Si cells and having textured front surfaces in the cover sheets. r 2002 Elsevier Science B.V. All rights reserved.

  • Transmittance from photovoltaic materials under Diffuse Light
    Solar Energy Materials and Solar Cells, 2003
    Co-Authors: Antonio Parretta, Pietro P. Altermatt, Juanning Zhao
    Abstract:

    The optical transmittance properties, under Diffuse Light, of semitransparent materials used to fabricate photovoltaic devices have been investigated by using an apparatus provided with two "coupled" integrating spheres, one for producing the incident Diffuse Light and the other for collecting the transmitted Light. A detailed analysis of the measurement conditions has been performed taking into account the perturbing effect each sphere produces on the other, and a final expression for the correct transmittance of the sample is derived. ?? 2002 Published by Elsevier Science B.V.

Antonio Parretta - One of the best experts on this subject based on the ideXlab platform.

  • Optical loss of photovoltaic modules under Diffuse Light
    Solar Energy Materials and Solar Cells, 2003
    Co-Authors: Antonio Parretta, Pietro P. Altermatt, Haruna Yakubu, F Ferrazza, Martin A. Green, Juanning Zhao
    Abstract:

    The optical behaviour of photovoltaic (PV) modules from different fabrication technologies was investigated under Diffuse Light by a novel characterization method. The optical apparatus, hemispherical/hemispherical reflectometer, allows both reflectance and transmittance measurements under an incident Diffuse Light which simulates the distributed outdoor irradiation from the sky or from the albedo. This paper presents only the configuration for reflectance measurements. The apparatus is provided with a single integrating sphere of 40 cm diameter, which acts as a lambertian source of Diffuse Light and spontaneously collects the Diffuse Light reflected by the sample in the front hemisphere. The hemispherical/hemispherical reflectance, R hh ; expresses the optical loss of the PV device under Diffuse Light, and is obtained by measurements of Light irradiance inside the sphere in correspondence with the sample and with a selected number of standards of Diffuse reflectance. The best optical performances, in terms of optical loss, were achieved by modules realized with blue mono-Si cells and having textured front surfaces in the cover sheets. r 2002 Elsevier Science B.V. All rights reserved.

  • Transmittance from photovoltaic materials under Diffuse Light
    Solar Energy Materials and Solar Cells, 2003
    Co-Authors: Antonio Parretta, Pietro P. Altermatt, Juanning Zhao
    Abstract:

    The optical transmittance properties, under Diffuse Light, of semitransparent materials used to fabricate photovoltaic devices have been investigated by using an apparatus provided with two "coupled" integrating spheres, one for producing the incident Diffuse Light and the other for collecting the transmitted Light. A detailed analysis of the measurement conditions has been performed taking into account the perturbing effect each sphere produces on the other, and a final expression for the correct transmittance of the sample is derived. ?? 2002 Published by Elsevier Science B.V.

John C Schotland - One of the best experts on this subject based on the ideXlab platform.

  • coherent acousto optic tomography with Diffuse Light
    Optics Letters, 2020
    Co-Authors: Francis J Chung, Jeremy G Hoskins, John C Schotland
    Abstract:

    We propose a method to reconstruct the optical properties of a highly scattering medium from acousto-optic measurements. The method is based on solving an inverse problem with internal data for a system of diffusion equations.

  • imaging complex structures with Diffuse Light
    Optics Express, 2008
    Co-Authors: Soren D Konecky, Arjun G. Yodh, George Y Panasyuk, Vadim A Markel, John C Schotland
    Abstract:

    We use Diffuse optical tomography to quantitatively reconstruct images of complex phantoms with millimeter sized features located centimeters deep within a highly-scattering medium. A non-contact instrument was employed to collect large data sets consisting of greater than 107 source-detector pairs. Images were reconstructed using a fast image reconstruction algorithm based on an analytic solution to the inverse scattering problem for Diffuse Light.

Pietro P. Altermatt - One of the best experts on this subject based on the ideXlab platform.

  • Optical loss of photovoltaic modules under Diffuse Light
    Solar Energy Materials and Solar Cells, 2003
    Co-Authors: Antonio Parretta, Pietro P. Altermatt, Haruna Yakubu, F Ferrazza, Martin A. Green, Juanning Zhao
    Abstract:

    The optical behaviour of photovoltaic (PV) modules from different fabrication technologies was investigated under Diffuse Light by a novel characterization method. The optical apparatus, hemispherical/hemispherical reflectometer, allows both reflectance and transmittance measurements under an incident Diffuse Light which simulates the distributed outdoor irradiation from the sky or from the albedo. This paper presents only the configuration for reflectance measurements. The apparatus is provided with a single integrating sphere of 40 cm diameter, which acts as a lambertian source of Diffuse Light and spontaneously collects the Diffuse Light reflected by the sample in the front hemisphere. The hemispherical/hemispherical reflectance, R hh ; expresses the optical loss of the PV device under Diffuse Light, and is obtained by measurements of Light irradiance inside the sphere in correspondence with the sample and with a selected number of standards of Diffuse reflectance. The best optical performances, in terms of optical loss, were achieved by modules realized with blue mono-Si cells and having textured front surfaces in the cover sheets. r 2002 Elsevier Science B.V. All rights reserved.

  • Transmittance from photovoltaic materials under Diffuse Light
    Solar Energy Materials and Solar Cells, 2003
    Co-Authors: Antonio Parretta, Pietro P. Altermatt, Juanning Zhao
    Abstract:

    The optical transmittance properties, under Diffuse Light, of semitransparent materials used to fabricate photovoltaic devices have been investigated by using an apparatus provided with two "coupled" integrating spheres, one for producing the incident Diffuse Light and the other for collecting the transmitted Light. A detailed analysis of the measurement conditions has been performed taking into account the perturbing effect each sphere produces on the other, and a final expression for the correct transmittance of the sample is derived. ?? 2002 Published by Elsevier Science B.V.

Ramesh Raskar - One of the best experts on this subject based on the ideXlab platform.

  • pose estimation using time resolved inversion of Diffuse Light
    Optics Express, 2014
    Co-Authors: Dan Raviv, Christopher Barsi, Nikhil Naik, Micha Feigin, Ramesh Raskar
    Abstract:

    We present a novel approach for evaluation of position and orientation of geometric shapes from scattered time-resolved data. Traditionally, imaging systems treat scattering as unwanted and are designed to mitigate the effects. Instead, we show here that scattering can be exploited by implementing a system based on a femtosecond laser and a streak camera. The result is accurate estimation of object pose, which is a fundamental tool in analysis of complex scenarios and plays an important role in our understanding of physical phenomena. Here, we experimentally show that for a given geometry, a single incident illumination point yields enough information for pose estimation and tracking after multiple scattering events. Our technique can be used for single-shot imaging behind walls or through turbid media.