Improved Characterization of Optical Surfaces from Scattered Light Measurements

2007 ◽  
Author(s):  
James E. Harvey ◽  
Andrey Krywonos
Keyword(s):  
Scattered Light ◽  
Optical Surfaces

Knife-edge test for characterization of subnanometer deformations in micro-optical surfaces

1999 ◽  
Author(s):  
Frederic Zamkotsian ◽  
Kjetil Dohlen ◽  
Patrick Lanzoni ◽  
Silvio P. Mazzanti ◽  
Marie-Laurence Michel ◽  
...  
Keyword(s):  
Knife Edge ◽  
Optical Surfaces

Benthic Habitats and the Effects of Fishing

2005 ◽  
Keyword(s):  
Scattered Light ◽  
Fish Habitat ◽  
Laser Line ◽  
Underwater Imaging ◽  
Benthic Habitats ◽  
Sea Floor ◽  
Line Scan ◽  
Imaging Sensors ◽  
Laser Line Scan

Laser-based underwater imaging sensors have been developed and matured in the last decade that provide high resolution optical imagery of the sea floor. Laser Line Scan (LLS) and Streak Tube Imaging Lidar (STIL) have been particularly successful. A prototype Fluorescence Imaging Laser Line Scan (FILLS) sensor has been deployed in several underwater environments, yielding highresolution (~1 cm pixel size) imagery of the associated benthic habitats. The prototype FILLS sensor illuminates the sea floor with 488 nm laser light, and constructs four independent images from light collected at 488 nm, 520 nm, 580 nm, and 685 nm, respectively. The 488 nm image is formed from elastically scattered light (i.e., light scattered with no change in photon energy), while the other images are formed by inelastically scattered light. (The FILLS sensor is routinely operated during nighttime hours so that ambient illumination is negligible). Fluorescence is the primary physical mechanism giving rise to the inelastically scattered light sensed by FILLS. Coral reef environments produce particularly strong (and spectacular!) fluorescence imagery. FILLS was developed primarily for the detection, classification, and identification of man-made objects in underwater environments. In addition it can serve admirably for the characterization of underwater habitats. Examples of FILLS imagery relevant to fish habitat evaluation will be presented.

scholarly journals Characterization of all second-order nonlinear-optical coefficients of organic N-benzyl-2-methyl-4-nitroaniline crystal

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Takashi Notake ◽  
Masahiro Takeda ◽  
Shuji Okada ◽  
Takuya Hosobata ◽  
Yutaka Yamagata ◽  
...  
Keyword(s):  
Nonlinear Optical ◽  
Organic Materials ◽  
Second Order ◽  
Organic N ◽  
Application Study ◽  
Optical Surfaces ◽  
Nlo Property ◽  
Diamond Blade ◽  
First Time

Abstract Full elements of second-order nonlinear optical (NLO) tensor can be completely characterized for an organic NLO crystal for the first time. As-grown bulk N-benzyl-2-methyl-4-nitroaniline (BNA) crystal was processed to expose (100) and (010) crystal orientations with fine optical surfaces by using precision lathe and diamond blade. Then, every five nonvanishing second-order NLO coefficient of BNA can be determined quantitatively using the precisely processed crystals based on 1st-kind Maker fringe measurements. Our method makes it possible to clarify uncertain NLO property of any organic materials and to accelerate application study via precise device fabrications even for fragile organic materials.

scholarly journals Optical Characterization of Homogeneous and Heterogeneous Intralipid-Based Samples

2020 ◽  
Vol 10 (18) ◽  
pp. 6234
Author(s):  
Ines Delfino ◽  
Maria Lepore ◽  
Rosario Esposito
Keyword(s):  
Optical Properties ◽  
Light Scattering ◽  
Scattered Light ◽  
Industrial Applications ◽  
Point Of View ◽  
Turbid Media ◽  
Time Resolved ◽  
Propagation Of Light ◽  
First Time

Different scattering processes take place when photons propagate inside turbid media. Many powerful experimental techniques exploiting these processes have been developed and applied over the years in a large variety of situations from fundamental and applied research to industrial applications. In the present paper, we intend to take advantage of Static Light Scattering (SLS), Dynamic Light Scattering (DLS), and Time-Resolved Transmittance (TRT) for investigating all the different scattering regimes by using scattering suspensions in a very large range of scatterer concentrations. The suspensions were prepared using Intralipid 20%, a material largely employed in studies of the optical properties of turbid media, with concentrations from 10−5% to 50%. By the analysis of the angular and temporal dependence of the scattered light, a more reliable description of the scattering process occurring in these samples can be obtained. TRT measurements allowed us to obtain information on the reduced scattering coefficient, an important parameter largely used in the description of the optical properties of turbid media. TRT was also employed for the detection of inclusions embedded in Intralipid suspensions, by using a properly designed data analysis. The present study allowed us to better elucidate the dependence of scattering properties of Intralipid suspensions in a very large concentration range and the occurrence of the different scattering processes involved in the propagation of light in turbid media for the first time to our knowledge. In so doing, the complementary contribution of SLS, DLS, and TRT in the characterization of turbid media from an optical and structural point of view is strongly evidenced.

scholarly journals Optical characterization of optofluidic waveguides using scattered light imaging

2011 ◽  
Vol 284 (16-17) ◽  
pp. 3980-3982 ◽  
Author(s):  
Micah H. Jenkins ◽  
Brian S. Phillips ◽  
Yue Zhao ◽  
Matthew R. Holmes ◽  
Holger Schmidt ◽  
...  
Keyword(s):  
Scattered Light ◽  
Optical Characterization ◽  
Optofluidic Waveguides

Scattered light imaging method (SLIM) for characterization of arbitrary laser beam intensity profiles

2014 ◽  
Vol 53 (20) ◽  
pp. 4555 ◽  
Author(s):  
Kelly C. Jorge ◽  
Rudimar Riva ◽  
Nicolau A. S. Rodrigues ◽  
João M. S. Sakamoto ◽  
Marcelo G. Destro
Keyword(s):  
Laser Beam ◽  
Scattered Light ◽  
Beam Intensity ◽  
Imaging Method ◽  
Laser Beam Intensity

scholarly journals Characterization of Magnetoelectropolished Stainless Steel Surfaces’ Texture by Using the Angle-Resolved Scattering and Image Processing Analysis Methods

Metals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1098 ◽  
Author(s):  
Wojciech Kapłonek ◽  
Krzysztof Rokosz ◽  
Danil Yurievich Pimenov
Keyword(s):  
Parametric Analysis ◽  
Scattered Light ◽  
Experimental Studies ◽  
Industrial Applications ◽  
Electrochemical Polishing ◽  
Base Surface ◽  
Surface Conditions ◽  
Steel Surfaces ◽  
Stainless Austenitic Steel

In this article, the results of preliminary experimental studies related to a fast, non-contact assessment of the AISI 316L stainless austenitic steel surfaces after electrochemical polishing in a magnetic field have been presented. The experiments were realized with the use of a modified angle-resolved scattering (ARS) method based on the analysis of angular distribution of the scattered light intensity. Digital images of such distribution were acquired for selected areas of examined samples—base surface and surface after magnetoelectropolishing (MEP) process. Parametric analysis oriented toward the calculation of selected key geo- and photometric parameters carried out in Image Pro®-Plus software allowed for characterization of the surface conditions of the assessed samples in terms of their scattering properties. The obtained experimental results confirmed the usefulness of the ARS method used in the presented studies as well as the possibility of its practical use (after appropriate modifications) on a wider scale, especially in industrial applications.

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