Patent ID: 9164066
Filing Date: 2015-10-20
Classification: G01N

Abstract:
1. A method comprising: emitting a light from a light source; receiving the light at a fiber bundle comprising a first plurality of optical fibers; transmitting the light from the plurality of fibers into a sensor structure comprising a housing disposed separate from the light source, wherein the first plurality of optical fibers enters the sensor structure through the housing; receiving the light from the plurality of fibers at a cylinder lens inside the housing, wherein the cylinder lens causes the light to have pattern of light comprising a first Gaussian profile in an “X” direction relative to a plane and a second Gaussian profile in a “Y” direction relative to the plane, and wherein the cylinder lens causes the first Gaussian profile and the second Gaussian profile to be different; transmitting the light from the cylinder lens to a first mirror inside the housing and in optical communication with the cylinder lens; transmitting the light from the first mirror onto a test object, wherein the pattern of light is configured to cause sound waves in the test object and a response light from the test object; generating the sound waves in the test object using the pattern of light; generating response light from the test object; transmitting the response light to a second mirror inside the housing; transmitting the response light from the second mirror to a plurality of collimators inside the housing; transmitting the response light from the plurality of collimators to a second plurality of optical fibers connected to the plurality of collimators, each optical fiber of the second plurality of optical fibers connected to a corresponding collimator of the plurality of collimators, the second plurality of optical fibers exiting the housing; and transmitting the light from the second plurality of optical fibers to an interferometer system outside the housing and in optical communication with the second plurality of optical fibers.