Angular light scattering studies using low-coherence interferometry
نویسندگان
چکیده
A modified Michelson interferometer is used to measure path-length resolved angular distributions of light backscattered by turbid media. The path length resolution is obtained by exploiting the coherence properties of a broadband source. The angular distribution is mapped out using a simple optical system to scan the angle at which the reference field intersects the detector plane. Angular scattering distributions can be compared to Mie theory to determine the size and refractive index of spherical scatterers. Initial studies utilizing this system demonstrate the potential of low coherence interferometry for obtaining structural information using angular distributions.
منابع مشابه
Measurement of angular distributions by use of low-coherence interferometry for light-scattering spectroscopy.
We present a novel interferometer for measuring angular distributions of backscattered light. The new system exploits a low-coherence source in a modified Michelson interferometer to provide depth resolution, as in optical coherence tomography, but includes an imaging system that permits the angle of the reference field to be varied in the detector plane by simple translation of an optical elem...
متن کاملInverse scattering solutions using low-coherence light.
We present a new wave-vector-space approach for solving inverse scattering problems. In our formulation, the theories for diffraction tomography and coherence gating are combined to explain 3D reconstruction with low-coherence light. Specifically, we apply this method to solve the scattering problem with broadband fields for transmission and reflection measurements. Our results can be applied t...
متن کاملExperimental calibration of a new angle-resolved low coherence interferometry system
We describe results of calibration experiments using a new angle-resolved low coherence interferometry system. Light scattered from a polystyrene microsphere sample are compared with Mie Theory predictions to determine the size of the particles. © 2003 Optical Society of America OCIS codes: Low coherence interferometry, light scattering spectroscopy.
متن کاملDetermination of particle size by using the angular distribution of backscattered light as measured with low-coherence interferometry.
We employ a novel interferometer to measure the angular distribution of light backscattered by a turbid medium. Through comparison of the measured data with the predictions of Mie theory, we are able to determine the size of the scatterers comprising the medium with subwavelength precision. As the technique is based on low-coherence interferometry, we are able to examine the evolution of the an...
متن کاملNuclear Morphology Measurements with Angle-Resolved Low Coherence Interferometry For Application To Cell Biology And Early Cancer Detection
The study of intact, living cells using non-invasive optical spectroscopic methods offers the opportunity to assess cellular structure and organization in a way that is not possible with commonly used cell biology imaging techniques. We have developed a novel spectroscopic technique for diagnosing disease at the cellular level based on using low-coherence interferometry (LCI) to detect the angu...
متن کامل