Photoacoustic remote sensing (PARS)
AssigneeIllumisonics Inc.
InventorsParsin Haji Reza, Roger Zemp
Life of this patent
Estimating the term…
Abstract
A photoacoustic remote sensing system (PARS) for imaging a subsurface structure in a sample has an excitation beam configured to generate ultrasonic signals in the sample at an excitation location; an interrogation beam incident on the sample at the excitation location, a portion of the interrogation beam returning from the sample that is indicative of the generated ultrasonic signals; an optical system that focuses at least one of the excitation beam and the interrogation beam with a focal point that is below the surface of the sample; and a detector that detects the returning portion of the interrogation beam.
Claims20
A method of visualizing details in a sample, the method comprising the steps of:
- generating signals in the sample at an excitation location using an excitation beam of light, the excitation beam being focused below a surface of the sample;
- interrogating the sample with an interrogation beam of light directed toward the excitation location of the sample, the interrogation beam being focused below the surface of the sample;
- and
- detecting a portion of the interrogation beam returning from the sample.
A method of visualizing details in a sample, the method comprising the steps of:
- directing an excitation beam, using one or more lasers, toward an excitation location below a surface of the sample, to generate signals in the sample;
- directing an interrogation beam, using the one or more lasers, toward the excitation location of the sample;
- and
- directing detection of a portion of the interrogation beam returning from the sample that is indicative of the generated signals.
A method of visualizing details in a sample, the method comprising the steps of:
- generating, using one or more light sources, an excitation beam for directing to below a surface of the sample to generate signals;
- generating, using the one or more light sources, an interrogation beam for directing to below the surface of the sample;
- and
- detecting a portion of the interrogation beam returning from the sample that is indicative of the generated signals.
Dependencies are inferred from the claim text.