Electric-controlled focal shift ultra-resolved iris filter

Abstract

A super resolution pupil filter with focus movement controlled by electricity belongs to the optical super resolution technical field, which comprises a polarizer (1), an Lambada / 4 delay wave plate (2) of Lambada Pi / 4 azimuth angle, an electro-optic crystal (3), a radial symmetry doubly refracting crystal (4), an Lambada / 4 delay wave plate (5) of 3 Pi / 4 azimuth angles, and an analyzer (6). The polarizer (1) is parallel to a euphotic shaft of the analyzer (6), and the azimuth angle of the electro-optic crystal (3) is defined according to the position of an electric induction main shaft, and an electric induction slow shaft is consistent with an euphotic shaft of the polarizer (1). The slow shaft direction of the radial symmetry doubly refracting crystal (4) has an included angle of Pi / 4 with the euphotic shaft of the polarizer (1). The size of an electric field size added outside of the electro-optic crystal (3) is defined according to a half wave voltage of the electro-optic crystal, and the voltage change range is between the half wave voltage of o to 2 times. The invention can synchronously realize the electric control of transverse super resolution and radial focus moving effect by conducting electro-optic modulation to the electro-optic crystal.

Description

technical field [0001] The invention relates to a super-resolution pupil filter with electrically controllable focal shift, which realizes real-time control of focal shift and super-resolution characteristics, and is mainly used in technologies such as optical super-resolution, automatic focusing, laser precision machining, and optical information storage. field. Background technique [0002] The two effects of axial focus shift and optical super-resolution have been extensively and intensively studied independently. In recent years, the technology of using polarization interference to design pupil filters to obtain light intensity redistribution near the focal point has attracted extensive attention. In the axial direction, the technology of using the principle of polarization interference to design the pupil filter to obtain the focus position has been developed one after another. effect to achieve super-resolution. [0003] The prior art [1] (see D.R.Chowdhury, "Possib...

AI Technical Summary

Problems solved by technology

The disadvantage of this technology is that the super-resolution performance parameters cannot be adjusted, and real-time control of super-resolution characteristics cannot be realized.

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