Miniaturized optical microprobe for sizing in multiple-scattering systems

Karsten Dierks; Matthias Dieckmann; J. Krueger

doi:10.1117/12.301114

1 January 1998 Miniaturized optical microprobe for sizing in multiple-scattering systems

Karsten Dierks, Matthias Dieckmann, J. Krueger

Proceedings Volume 3199, Biomedical Systems and Technologies II; (1998) https://doi.org/10.1117/12.301114
Event: BiOS Europe '97, 1997, San Remo, Italy

Abstract

Instruments based on photon counting in the visible part of the spectrum with subsequent signal autocorrelation of the light intensity fluctuation are widely used for the characterization of clear media, but are performance limited if multiple scattering samples or particle suspensions with an inherent diffusion limitation are probed. These systems are classified as turbid media. We give advanced approaches as to how multiple scattering systems predominantly existing in industry can be examined, in order to resolve the sizes of suspended scattering centers. Latex particles and emulsions were used as models. Monte Carlo calculations of the light transport mechanisms in turbid media were performed and compared with measurements. A dynamic light scattering instrument was used to perform measurements on highly concentrated and turbid samples. For example, with particle standards of 83 nm, a size of 85 nm +/- 5.8 nm (n equals 10) was obtained and particles with a size of 895 nm were measured to be 895 nm +/- 9.1 nm (n equals 10). The influence of multiple scattering on the autocorrelation function was both measured and calculated. We have shown that our calculations are in good agreement with the test results obtained and it was found that our miniaturized instrument is a valuable tool to measure particle sizes in turbid media.

Citation Download Citation

Karsten Dierks, Matthias Dieckmann, and J. Krueger "Miniaturized optical microprobe for sizing in multiple-scattering systems", Proc. SPIE 3199, Biomedical Systems and Technologies II, (1 January 1998); https://doi.org/10.1117/12.301114

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
8 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Scattering

Light scattering

Particles

Mie scattering

Optical spheres

Latex

Multiple scattering

Show All Keywords

Keywords/Phrases

Search In:

Publication Years