Small-scale-range electric field non-uniformity detection device and method based on suspension microspheres

The invention discloses a small-scale range electric field non-uniformity detection device and method based on suspended microspheres, and the method comprises the steps: capturing microspheres through a vertical upward light trap formed by laser, and carrying out the three-axis cooling and stable suspension of the microspheres under high vacuum; placing parallel electrode plates on the upper side and the lower side of the suspension microsphere respectively, changing the voltage applied to the parallel electrode plates, and changing the optical radiation pressure at the same time, so that the microsphere counteracts the gravity under the action of the electric field force, and further judging the electric field intensity at the balance position; by changing the laser power and moving the parallel electrode plates by using the high-precision displacement table, the electric field intensity measurement and analysis at different balance positions of the suspended microspheres are realized. According to the inve