Tunable Acoustic Gradient Index of Refraction Lens and System

摘要

A tunable acoustic gradient index of refraction (TAG) lens and system are provided that permit, in one aspect, dynamic selection of the lens output, including dynamic focusing and imaging. The system may include a TAG lens and at least one of a source and a detector of electromagnetic radiation. A controller may be provided in electrical communication with the lens and at least one of the source and detector and may be configured to provide a driving signal to control the index of refraction and to provide a synchronizing signal to time at least one of the source and the detector relative to the driving signal. Thus, the controller is able to specify that the source irradiates the lens (or detector detects the lens output) when a desired refractive index distribution is present within the lens, e.g. when a desired lens output is present.

主权项

1. A tunable acoustic gradient index of refraction lens, comprising: a casing having a cavity disposed therein for receiving a refractive material capable of changing its refractive index in response to application of an acoustic wave thereto, the casing having an electrical feedthrough port in the casing wall in communication with the cavity; and a piezoelectric element disposed within the casing in acoustic communication with the cavity for delivering an acoustic wave to the cavity to alter the refractive index of the refractive material responsively to an input or an output of electromagnetic radiation to or from the cavity.