Scanning ultrasound detection device using two-wave mixing in photorefractive crystal interferometry
AssigneeIndustrial Technology Research Institute
InventorsJu-Yi Lee, Hsueh-Ching Shih
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Abstract
This invention relates to a scanning ultrasound detection device using two-wave mixing in photorefractive crystal interferometry. An interferometer with two-wave mixing in photorefractive crystal, and cooperates with a confocal lenses module to perform a scan and inspection of the surface of a target. A rotating unit is used for directing a signal beam for detection to be incident upon different locations of the target. The confocal lens module is used to compensate any changes of reflection path caused by the signal beam having different incident angles. Hence, a reflected signal beam and a reference beam can strike on a photo detector.
Claims11
A scanning ultrasound detection device using two-wave mixing in photorefractive interferomtery, in cooperation with a light source, an ultrasound-wave-generating-module and a target wherein said ultrasound-wave-generating-module generates at least an ultrasound signal to cause said target to bring about ultrasound vibrations, comprising:
- an interferometer with two-wave mixing in photorefractive crystal for receiving rays of light coming from said light source to generate a signal beam for detecting said ultrasound vibrations of said target and a reference beam having an interference with said signal beam;
- and
- a rotating unit for directing said signal beam to be incident upon different locations of said target to result in a scanning motion.
Dependencies are inferred from the claim text.