Development of a generalized theoretical model for the response of a phase/Doppler measurement system to arbitrarily oriented fibers illuminated by Gaussian beams

Schaub, Scott A.; Lock, James A.; Naqwi, Amir

doi:10.1364/ao.37.007842

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Position Of the Scattered Light Cones1

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1999

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“…Figure 4 presents the measured phase shift for a 17 mm ®xed ®ber as a function of the cross-beam tilt. Here, cross-beam tilt corresponds to the tilt direction perpendicular to the beam propagation (Y L direction), while in-beam tilt refers to the situation where the cylinder is tilted in the beam propagation direction (X L direction) [12]. Between 0 and 2.1 degrees, the measured phase shift is nearly constant at 340 degrees as predicted by theory.…”

Section: Position Of the Scattered Light Conesmentioning

confidence: 86%

An Interferometric Optical Technique for In-Situ Measurement of Fiber Diameter

Mignon¹,

Schaub²,

Naqwi

et al. 1999

Part. Part. Syst. Charact.

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The diameter distribution of ®bers plays an important role in the performance of many ®berglass products. The ®berglass industry, however, currently lacks the advanced instrumentation necessary for performing on-line ®ber diameter measurements. Enhanced measurement capabilities would provide manufacturers and researchers a tool to improve ®berizing methods, production ef®ciency, and overall ®berglass product performance. This paper describes the size measurement of moving glass ®bers using the Phase Doppler Anemometry technique. Simulation results are presented and validated experimentally. Theoretical modeling uses the mathematical solution for a tilted circular cylinder interacting with focused Laser beams. Experimental laboratory studies have been also conducted to evaluate the factors not included in the theoretical models.

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Section: Position Of the Scattered Light Conesmentioning

confidence: 86%