Mississippi State University

Metrolaser, Inc.

Hansheng Zhang

Vladimir Markov

Jagdish P Singh

Amit K Lal

L Ernesto Hurtado

Vyacheslav Aranchuk

Cecil F Hess

Fang-Yu Yueh

Robert L Cook

Awadesh K Rai

A multi-beam laser Doppler vibrometer simultaneously measures velocity, displacement, and vibration history of multiple locations on an object. A beam of coherent light is split into an object beam and a reference beam. The object beam is divided into a plurality of object beams to simultaneously illuminate multiple locations on the object under inspection. The reference beam is frequency shifted and split into a corresponding plurality of frequency-shifted reference beams. A portion of each object beam is reflected by the object as a modulated object beam. The plurality of modulated object beams are collected and respectively mixed with the plurality of frequency-shifted reference beams to provide a plurality of beam pairs. Each beam pair may be focused onto a photodetector or an optical fiber connected to a photodetector.

Multi-beam heterodyne laser Doppler vibrometer

Multi-beam heterodyne laser doppler vibrometer

A fiber optic laser-induced breakdown spectroscopy (LIBS) sensor, including a laser light source, a harmonic separator for directing the laser light, a dichroic mirror for reflecting the laser light, a coupling lens for coupling the laser light at an input of a multimode optical fiber, a connector for coupling the laser light from an output of the multimode optical fiber to an input of a high temperature holder, such as a holder made of stainless steel, and a detector portion for receiving emission signal and analyzing LIBS intensities. In one variation, the multimode optical fiber has silica core and silica cladding. The holder includes optical lenses for collimating and focusing the laser light in a molten alloy to produce a plasma, and for collecting and transmitting an emission signal to the multimode optical fiber.

Fiber optic laser-induced breakdown spectroscopy sensor for molten material analysis

The invention relates to an analytical method using laser-induced breakdown spectroscopy.

Analytical method using laser-induced breakdown spectroscopy

Growing community of inventors

Aliso Viejo, CA, United States of America

Hansheng Zhang