Abstract: An optical system affixed to an electronic apparatus is provided, including a first optical module, a second optical module, and a third optical module. The first optical module is configured to adjust the moving direction of a first light from a first moving direction to a second moving direction, wherein the first moving direction is not parallel to the second moving direction. The second optical module is configured to receive the first light moving in the second moving direction. The first light reaches the third optical module via the first optical module and the second optical module in sequence. The third optical module includes a first photoelectric converter configured to transform the first light into a first image signal.

Abstract: The present invention provides a vortexed-acoustic-field method for creating cell permeability and opening blood-brain barrier, which comprises using an ultrasonic transducer; using a probe emitting a vortexed acoustic field, the probe emitting a vortexed acoustic field having a piezoelectric patch comprising at least one inner channel, where when there is a plurality of inner channels, a phase difference is generated between each two channels, which is used by the ultrasonic transducer to generate a vortex in an acoustic channel; and generating a vortexed acoustic field to enable the cells to have permeability, where the vortexed acoustic field has the following parameters: frequency: 20 kHz to 20 MHz, and acoustic pressure: 0.1 to 10 MPa.