Planar nephelometry is a laser-based technique of imaging the light scattered from particles to provide information about the local number density of these particles. In many seeded flows of practical interest, such as pulverized coal flames, particle loadings are sufficiently high for the incident laser beam to be severely attenuated. Measurements in these flows are therefore difficult, and limited data are available under these conditions. Laser attenuation experiments were conducted in suspensions of spherical particles in water at various concentrations. This is used to formulate a calibration for the effects of diffuse scattering and laser sheet extinction. A model for the distribution of light through a heavily seeded, light-scattering medium is also developed and is compared with experimental results. It is demonstrated that the scattered signal may be considered proportional to the local particle concentration multiplied by the incident laser power. The incident laser power varies as a function of the attenuation by obscurement. This correction for planar nephelometry images thus extends the technique to provide pseudoquantitative data for instantaneous particle concentration measurements.

© 2007 Optical Society of America

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

Related Journal Articles

• Approximations to Ideal-Observer Performance on Signal-Detection Tasks (AO)
• Two-dimensional angular light-scattering in aqueous NaCl single aerosol particles during deliquescence and efflorescence (OE)
• Integrated Analysis and Design of Analog and Digital Processing in Imaging Systems: Introduction to the Feature Issue (AO)
• Two-dimensional synthetic aperture imaging in the optical domain (OL)
• Corrections to facilitate planar imaging of particle concentration in particle-laden flows using Mie scattering. Part 2: Diverging laser sheets (AO)

Related Conference Papers

• Ultra-Thin Folded Imager
• Adaptive Flat Micro-Mirror Array-Based Computational Imaging Architecture
• Computational Hyperspectral Microscopy in Biomedicine: Studies of Brain Function
• Diffraction-Limited Impulse Response Image Reconstruction with a Single Imaging Pixel
• Real-Time Aberration Compensation without a Wavefront Sensor