Abstract

Two-dimensional angular optical scattering (TAOS) patterns of aerosols are measured simultaneously from the forward hemisphere 15°<θ<90° as well as the backward hemisphere 90°<θ<165° (detecting 63% of the 4π sr of scattered light) by using an ellipsoidal reflector and an intensified CCD detector. TAOS patterns were obtained from polystyrene-latex spheres (individuals and aggregates) and from single Bacillus subtilis spores. These information-rich patterns, measured with a single laser pulse for individual particles on the fly, suggest that forward-TAOS and backward-TAOS measurements may be used for rapid classification of single aerosol particles.

© 2006 Optical Society of America

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[CrossRef]

2003

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J. R. Bottinger, P. J. Deluca, E. W. Stuebing, and D. R. Vanreenaen, J. Aerosol Sci. 29, S965 (1998).
[CrossRef]

S. Holler, Y. L. Pan, J. R. Bottiger, S. C. Hill, D. B. Hillis, and R. K. Chang, Opt. Lett. 23, 1489 (1998).
[CrossRef]

1996

T. Peter, Science 273, 1352 (1996).
[CrossRef]

E. Hirst and P. H. Kaye, J. Geophys. Res., [Atmos.] 101, 19231 (1996).
[CrossRef]

1995

R. G. Pinnick, S. C. Hill, P. Nachman, J. D. Pendleton, G. L. Fernandez, M. W. Mayo, and J. G. Bruno, Aerosol Sci. Technol. 23, 653 (1995).
[CrossRef]

1994

1969

P. J. Wyatt, Nature 221, 1257 (1969).
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Aptowicz, K.

Aptowicz, K. B.

K. B. Aptowicz, R. G. Pinnick, S. C. Hill, Y. L. Pan, and R. K. Chang, J. Geophys. Res., [Atmos.] 111, D12212 (2006).
[CrossRef]

Bohren, C. F.

C. F. Bohren and D. R. Huffman, Absorption and Scattering of Light by Small Particles (Wiley, 1983).

Bottiger, J. R.

Bottinger, J. R.

Y. L. Pan, S. Holler, R. K. Chang, S. C. Hill, R. G. Pinnick, S. Niles, and J. R. Bottinger, Opt. Lett. 24, 116 (1999).
[CrossRef]

J. R. Bottinger, P. J. Deluca, E. W. Stuebing, and D. R. Vanreenaen, J. Aerosol Sci. 29, S965 (1998).
[CrossRef]

Bruno, J. G.

R. G. Pinnick, S. C. Hill, P. Nachman, J. D. Pendleton, G. L. Fernandez, M. W. Mayo, and J. G. Bruno, Aerosol Sci. Technol. 23, 653 (1995).
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Buckley, S. G.

Chang, R. K.

Deluca, P. J.

J. R. Bottinger, P. J. Deluca, E. W. Stuebing, and D. R. Vanreenaen, J. Aerosol Sci. 29, S965 (1998).
[CrossRef]

Fernandez, G. L.

R. G. Pinnick, S. C. Hill, P. Nachman, J. D. Pendleton, G. L. Fernandez, M. W. Mayo, and J. G. Bruno, Aerosol Sci. Technol. 23, 653 (1995).
[CrossRef]

Guppy, J. R.

Henderson, D. A.

D. A. Henderson, Science 283, 1279 (1999).
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Hill, S. C.

K. B. Aptowicz, R. G. Pinnick, S. C. Hill, Y. L. Pan, and R. K. Chang, J. Geophys. Res., [Atmos.] 111, D12212 (2006).
[CrossRef]

Y. L. Pan, S. Holler, R. K. Chang, S. C. Hill, R. G. Pinnick, S. Niles, and J. R. Bottinger, Opt. Lett. 24, 116 (1999).
[CrossRef]

S. Holler, Y. L. Pan, J. R. Bottiger, S. C. Hill, D. B. Hillis, and R. K. Chang, Opt. Lett. 23, 1489 (1998).
[CrossRef]

R. G. Pinnick, S. C. Hill, P. Nachman, J. D. Pendleton, G. L. Fernandez, M. W. Mayo, and J. G. Bruno, Aerosol Sci. Technol. 23, 653 (1995).
[CrossRef]

Hillis, D. B.

Hirst, E.

E. Hirst and P. H. Kaye, J. Geophys. Res., [Atmos.] 101, 19231 (1996).
[CrossRef]

E. Hirst, P. H. Kaye, and J. R. Guppy, Appl. Opt. 33, 7180 (1994).
[CrossRef] [PubMed]

Holler, S.

Huffman, D. R.

C. F. Bohren and D. R. Huffman, Absorption and Scattering of Light by Small Particles (Wiley, 1983).

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Kaye, P. H.

E. Hirst and P. H. Kaye, J. Geophys. Res., [Atmos.] 101, 19231 (1996).
[CrossRef]

E. Hirst, P. H. Kaye, and J. R. Guppy, Appl. Opt. 33, 7180 (1994).
[CrossRef] [PubMed]

Lithgow, G. A.

Mayo, M. W.

R. G. Pinnick, S. C. Hill, P. Nachman, J. D. Pendleton, G. L. Fernandez, M. W. Mayo, and J. G. Bruno, Aerosol Sci. Technol. 23, 653 (1995).
[CrossRef]

Nachman, P.

R. G. Pinnick, S. C. Hill, P. Nachman, J. D. Pendleton, G. L. Fernandez, M. W. Mayo, and J. G. Bruno, Aerosol Sci. Technol. 23, 653 (1995).
[CrossRef]

Niles, S.

Pan, Y. L.

Pendleton, J. D.

R. G. Pinnick, S. C. Hill, P. Nachman, J. D. Pendleton, G. L. Fernandez, M. W. Mayo, and J. G. Bruno, Aerosol Sci. Technol. 23, 653 (1995).
[CrossRef]

Peter, T.

T. Peter, Science 273, 1352 (1996).
[CrossRef]

Pinnick, R. G.

K. B. Aptowicz, R. G. Pinnick, S. C. Hill, Y. L. Pan, and R. K. Chang, J. Geophys. Res., [Atmos.] 111, D12212 (2006).
[CrossRef]

Y. L. Pan, S. Holler, R. K. Chang, S. C. Hill, R. G. Pinnick, S. Niles, and J. R. Bottinger, Opt. Lett. 24, 116 (1999).
[CrossRef]

R. G. Pinnick, S. C. Hill, P. Nachman, J. D. Pendleton, G. L. Fernandez, M. W. Mayo, and J. G. Bruno, Aerosol Sci. Technol. 23, 653 (1995).
[CrossRef]

Stuebing, E. W.

J. R. Bottinger, P. J. Deluca, E. W. Stuebing, and D. R. Vanreenaen, J. Aerosol Sci. 29, S965 (1998).
[CrossRef]

Vanderberg, L. A.

Vanreenaen, D. R.

J. R. Bottinger, P. J. Deluca, E. W. Stuebing, and D. R. Vanreenaen, J. Aerosol Sci. 29, S965 (1998).
[CrossRef]

Wyatt, P. J.

P. J. Wyatt, Nature 221, 1257 (1969).
[CrossRef] [PubMed]

Aerosol Sci. Technol.

R. G. Pinnick, S. C. Hill, P. Nachman, J. D. Pendleton, G. L. Fernandez, M. W. Mayo, and J. G. Bruno, Aerosol Sci. Technol. 23, 653 (1995).
[CrossRef]

Appl. Opt.

Appl. Spectrosc.

J. Aerosol Sci.

J. R. Bottinger, P. J. Deluca, E. W. Stuebing, and D. R. Vanreenaen, J. Aerosol Sci. 29, S965 (1998).
[CrossRef]

J. Geophys. Res., [Atmos.]

E. Hirst and P. H. Kaye, J. Geophys. Res., [Atmos.] 101, 19231 (1996).
[CrossRef]

K. B. Aptowicz, R. G. Pinnick, S. C. Hill, Y. L. Pan, and R. K. Chang, J. Geophys. Res., [Atmos.] 111, D12212 (2006).
[CrossRef]

Nature

P. J. Wyatt, Nature 221, 1257 (1969).
[CrossRef] [PubMed]

Opt. Lett.

Science

T. Peter, Science 273, 1352 (1996).
[CrossRef]

D. A. Henderson, Science 283, 1279 (1999).
[CrossRef] [PubMed]

Other

C. F. Bohren and D. R. Huffman, Absorption and Scattering of Light by Small Particles (Wiley, 1983).

The Andor iStar ICCD has a quantum efficiency of 10.75% at a wavelength of 0.532 μm, and the minimum dark current achievable is 0.2 electron/pixel/s.

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Figures (2)

Fig. 1
Fig. 1

Scheme for collecting the elastic-scattering intensity pattern in both forward and backward hemispheres simultaneously with an ellipsoidal reflector and CCD detector. The spherical coordinate angles θ and ϕ are defined with the laser beam propagating along the z direction and the symmetry axis of the reflector along the x direction.

Fig. 2
Fig. 2

Simultaneously recorded forward- and backward-hemisphere scattering patterns for clusters of (a)–(d) PSL spheres ( 1.44 μ m in diameter) and (e)–(h) single BG spores. Each particle is illuminated by a single 30 ns laser pulse at 0.532 μ m . The edge of the inner black circles in the forward and backward hemisphere patterns corresponds to θ = 15 ° and θ = 165 ° , respectively. The outermost curved edge at the top and bottom of the patterns correspond to θ = 90 ° . Each pattern was normalized separately so that their intensities would span the entire range of gray scales. For comparison, the peak intensities measured in the forward hemisphere were on average 80 times stronger than the backward hemisphere.

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