Abstract

This work presents an apparatus that measures near-forward two-dimensional elastic scattering patterns of single aerosol particles and proposes a two-angle extension of the Guinier law to analyze these patterns. The particles, which approximately range from 2 to 8 micrometers in size, flow through the apparatus in an aerosol stream. A spatial filtering technique separates the near-forward portion of the patterns from the illumination light. Contours intended to represent the geometrical profile of the particles are generated from the patterns using the extension of the Guinier law. The analysis is applied to spherical and nonspherical particles, and the resulting contours are found to be consistent with particle shape only for spherical particles.

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  1. P. H. Kaye, K. B. Aptowicz, R. K. Chang, V. Foot, and G. Videen, “Angularly resolved elastic scattering from airborne particles; potential for characterizing, classifying, and identifying individual aerosol particles,” in Optics of Biological Particles, A. Hoekstra, V. Malstev, and G. Videen, eds., (Springer, Dordrecht, 2007).
  2. K. B. Aptowicz, R. G. Pinnick, S. C. Hill, Y.-L. Pan, and R. K. Chang, “Optical scattering patterns from single urban aerosol particles at Adelphi, Maryland, USA: A classification relating to particle morphologies,” J. Geophys. Res. 111(D12212), 1–13 (2006).
    [CrossRef]
  3. Y.-L. Pan, S. Holler, R. K. Chang, S. C. Hill, R. G. Pinnick, S. Niles, and J. R. Bottiger, “Single-shot fluorescence spectra of individual micrometer-sized bioaerosols illuminated by a 351 - or a 266-nm ultraviolet laser,” Opt. Lett. 24, 116–118 (1999).
    [CrossRef]
  4. J. D. Jackson, Classical Electrodynamics, (John Wiley & Sons, 1999).
  5. C. M. Sorensen and D. Shi, “Guinier analysis for homogeneous dielectric spheres of arbitrary size,” Opt. Commun. 178, 31–36 (2000).
    [CrossRef]
  6. M. J. Berg, C. M. Sorensen, and A. Chakrabarti, “Explanation of the patterns in Mie theory,” J. Quant. Spectrosc. Radiat. Transf. 111782–94 (2010).
    [CrossRef]
  7. C. M. Sorensen, “Light scattering by fractal aggregates: a review,” Aerosp. Sci. Technol. 35648–687 (2001).
  8. M. J. Berg, S. C. Hill, G. Videen, and K. G. Gurton, “Spatial filtering technique to image and measure two-dimensional near-forward scattering from single particles,” Opt. Express 189486–9495 (2010).
    [CrossRef] [PubMed]
  9. R. Saraf, “Small-angle scattering from anisotropic systems in the Guinier region,” Macromolecules 22, 675–681 (1989).
    [CrossRef]
  10. G. C. Summerfield and D. F. R. Mildner, “Small-angle scattering with azimuthal asymmetry,” J. Appl. Cryst. 16, 384–389 (1983).
    [CrossRef]
  11. D. M. Sadler, “Analysis of anisotropy of small-angle neutron scattering of polyethylene single crystals,” J. Appl. Cryst. 16, 519–523 (1983).
    [CrossRef]

2010 (2)

2006 (1)

K. B. Aptowicz, R. G. Pinnick, S. C. Hill, Y.-L. Pan, and R. K. Chang, “Optical scattering patterns from single urban aerosol particles at Adelphi, Maryland, USA: A classification relating to particle morphologies,” J. Geophys. Res. 111(D12212), 1–13 (2006).
[CrossRef]

2001 (1)

C. M. Sorensen, “Light scattering by fractal aggregates: a review,” Aerosp. Sci. Technol. 35648–687 (2001).

2000 (1)

C. M. Sorensen and D. Shi, “Guinier analysis for homogeneous dielectric spheres of arbitrary size,” Opt. Commun. 178, 31–36 (2000).
[CrossRef]

1999 (1)

1989 (1)

R. Saraf, “Small-angle scattering from anisotropic systems in the Guinier region,” Macromolecules 22, 675–681 (1989).
[CrossRef]

1983 (2)

G. C. Summerfield and D. F. R. Mildner, “Small-angle scattering with azimuthal asymmetry,” J. Appl. Cryst. 16, 384–389 (1983).
[CrossRef]

D. M. Sadler, “Analysis of anisotropy of small-angle neutron scattering of polyethylene single crystals,” J. Appl. Cryst. 16, 519–523 (1983).
[CrossRef]

Aptowicz, K. B.

K. B. Aptowicz, R. G. Pinnick, S. C. Hill, Y.-L. Pan, and R. K. Chang, “Optical scattering patterns from single urban aerosol particles at Adelphi, Maryland, USA: A classification relating to particle morphologies,” J. Geophys. Res. 111(D12212), 1–13 (2006).
[CrossRef]

P. H. Kaye, K. B. Aptowicz, R. K. Chang, V. Foot, and G. Videen, “Angularly resolved elastic scattering from airborne particles; potential for characterizing, classifying, and identifying individual aerosol particles,” in Optics of Biological Particles, A. Hoekstra, V. Malstev, and G. Videen, eds., (Springer, Dordrecht, 2007).

Berg, M. J.

Bottiger, J. R.

Chakrabarti, A.

M. J. Berg, C. M. Sorensen, and A. Chakrabarti, “Explanation of the patterns in Mie theory,” J. Quant. Spectrosc. Radiat. Transf. 111782–94 (2010).
[CrossRef]

Chang, R. K.

K. B. Aptowicz, R. G. Pinnick, S. C. Hill, Y.-L. Pan, and R. K. Chang, “Optical scattering patterns from single urban aerosol particles at Adelphi, Maryland, USA: A classification relating to particle morphologies,” J. Geophys. Res. 111(D12212), 1–13 (2006).
[CrossRef]

Y.-L. Pan, S. Holler, R. K. Chang, S. C. Hill, R. G. Pinnick, S. Niles, and J. R. Bottiger, “Single-shot fluorescence spectra of individual micrometer-sized bioaerosols illuminated by a 351 - or a 266-nm ultraviolet laser,” Opt. Lett. 24, 116–118 (1999).
[CrossRef]

P. H. Kaye, K. B. Aptowicz, R. K. Chang, V. Foot, and G. Videen, “Angularly resolved elastic scattering from airborne particles; potential for characterizing, classifying, and identifying individual aerosol particles,” in Optics of Biological Particles, A. Hoekstra, V. Malstev, and G. Videen, eds., (Springer, Dordrecht, 2007).

Foot, V.

P. H. Kaye, K. B. Aptowicz, R. K. Chang, V. Foot, and G. Videen, “Angularly resolved elastic scattering from airborne particles; potential for characterizing, classifying, and identifying individual aerosol particles,” in Optics of Biological Particles, A. Hoekstra, V. Malstev, and G. Videen, eds., (Springer, Dordrecht, 2007).

Gurton, K. G.

Hill, S. C.

Holler, S.

Jackson, J. D.

J. D. Jackson, Classical Electrodynamics, (John Wiley & Sons, 1999).

Kaye, P. H.

P. H. Kaye, K. B. Aptowicz, R. K. Chang, V. Foot, and G. Videen, “Angularly resolved elastic scattering from airborne particles; potential for characterizing, classifying, and identifying individual aerosol particles,” in Optics of Biological Particles, A. Hoekstra, V. Malstev, and G. Videen, eds., (Springer, Dordrecht, 2007).

Mildner, D. F. R.

G. C. Summerfield and D. F. R. Mildner, “Small-angle scattering with azimuthal asymmetry,” J. Appl. Cryst. 16, 384–389 (1983).
[CrossRef]

Niles, S.

Pan, Y.-L.

K. B. Aptowicz, R. G. Pinnick, S. C. Hill, Y.-L. Pan, and R. K. Chang, “Optical scattering patterns from single urban aerosol particles at Adelphi, Maryland, USA: A classification relating to particle morphologies,” J. Geophys. Res. 111(D12212), 1–13 (2006).
[CrossRef]

Y.-L. Pan, S. Holler, R. K. Chang, S. C. Hill, R. G. Pinnick, S. Niles, and J. R. Bottiger, “Single-shot fluorescence spectra of individual micrometer-sized bioaerosols illuminated by a 351 - or a 266-nm ultraviolet laser,” Opt. Lett. 24, 116–118 (1999).
[CrossRef]

Pinnick, R. G.

K. B. Aptowicz, R. G. Pinnick, S. C. Hill, Y.-L. Pan, and R. K. Chang, “Optical scattering patterns from single urban aerosol particles at Adelphi, Maryland, USA: A classification relating to particle morphologies,” J. Geophys. Res. 111(D12212), 1–13 (2006).
[CrossRef]

Y.-L. Pan, S. Holler, R. K. Chang, S. C. Hill, R. G. Pinnick, S. Niles, and J. R. Bottiger, “Single-shot fluorescence spectra of individual micrometer-sized bioaerosols illuminated by a 351 - or a 266-nm ultraviolet laser,” Opt. Lett. 24, 116–118 (1999).
[CrossRef]

Sadler, D. M.

D. M. Sadler, “Analysis of anisotropy of small-angle neutron scattering of polyethylene single crystals,” J. Appl. Cryst. 16, 519–523 (1983).
[CrossRef]

Saraf, R.

R. Saraf, “Small-angle scattering from anisotropic systems in the Guinier region,” Macromolecules 22, 675–681 (1989).
[CrossRef]

Shi, D.

C. M. Sorensen and D. Shi, “Guinier analysis for homogeneous dielectric spheres of arbitrary size,” Opt. Commun. 178, 31–36 (2000).
[CrossRef]

Sorensen, C. M.

M. J. Berg, C. M. Sorensen, and A. Chakrabarti, “Explanation of the patterns in Mie theory,” J. Quant. Spectrosc. Radiat. Transf. 111782–94 (2010).
[CrossRef]

C. M. Sorensen, “Light scattering by fractal aggregates: a review,” Aerosp. Sci. Technol. 35648–687 (2001).

C. M. Sorensen and D. Shi, “Guinier analysis for homogeneous dielectric spheres of arbitrary size,” Opt. Commun. 178, 31–36 (2000).
[CrossRef]

Summerfield, G. C.

G. C. Summerfield and D. F. R. Mildner, “Small-angle scattering with azimuthal asymmetry,” J. Appl. Cryst. 16, 384–389 (1983).
[CrossRef]

Videen, G.

M. J. Berg, S. C. Hill, G. Videen, and K. G. Gurton, “Spatial filtering technique to image and measure two-dimensional near-forward scattering from single particles,” Opt. Express 189486–9495 (2010).
[CrossRef] [PubMed]

P. H. Kaye, K. B. Aptowicz, R. K. Chang, V. Foot, and G. Videen, “Angularly resolved elastic scattering from airborne particles; potential for characterizing, classifying, and identifying individual aerosol particles,” in Optics of Biological Particles, A. Hoekstra, V. Malstev, and G. Videen, eds., (Springer, Dordrecht, 2007).

Aerosp. Sci. Technol. (1)

C. M. Sorensen, “Light scattering by fractal aggregates: a review,” Aerosp. Sci. Technol. 35648–687 (2001).

J. Appl. Cryst. (2)

G. C. Summerfield and D. F. R. Mildner, “Small-angle scattering with azimuthal asymmetry,” J. Appl. Cryst. 16, 384–389 (1983).
[CrossRef]

D. M. Sadler, “Analysis of anisotropy of small-angle neutron scattering of polyethylene single crystals,” J. Appl. Cryst. 16, 519–523 (1983).
[CrossRef]

J. Geophys. Res. (1)

K. B. Aptowicz, R. G. Pinnick, S. C. Hill, Y.-L. Pan, and R. K. Chang, “Optical scattering patterns from single urban aerosol particles at Adelphi, Maryland, USA: A classification relating to particle morphologies,” J. Geophys. Res. 111(D12212), 1–13 (2006).
[CrossRef]

J. Quant. Spectrosc. Radiat. Transf. (1)

M. J. Berg, C. M. Sorensen, and A. Chakrabarti, “Explanation of the patterns in Mie theory,” J. Quant. Spectrosc. Radiat. Transf. 111782–94 (2010).
[CrossRef]

Macromolecules (1)

R. Saraf, “Small-angle scattering from anisotropic systems in the Guinier region,” Macromolecules 22, 675–681 (1989).
[CrossRef]

Opt. Commun. (1)

C. M. Sorensen and D. Shi, “Guinier analysis for homogeneous dielectric spheres of arbitrary size,” Opt. Commun. 178, 31–36 (2000).
[CrossRef]

Opt. Express (1)

Opt. Lett. (1)

Other (2)

J. D. Jackson, Classical Electrodynamics, (John Wiley & Sons, 1999).

P. H. Kaye, K. B. Aptowicz, R. K. Chang, V. Foot, and G. Videen, “Angularly resolved elastic scattering from airborne particles; potential for characterizing, classifying, and identifying individual aerosol particles,” in Optics of Biological Particles, A. Hoekstra, V. Malstev, and G. Videen, eds., (Springer, Dordrecht, 2007).

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