Electric-controlled focal shift ultra-resolved iris filter

A pupil filter and super-resolution technology, which is applied in the field of super-resolution pupil filters, can solve the problems that super-resolution performance parameters cannot be adjusted, and real-time control of super-resolution characteristics cannot be realized.

Inactive Publication Date: 2008-05-14
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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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.

Method used

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  • Electric-controlled focal shift ultra-resolved iris filter
  • Electric-controlled focal shift ultra-resolved iris filter
  • Electric-controlled focal shift ultra-resolved iris filter

Examples

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the embodiments and accompanying drawings.

[0031] Fig. 1 is the structural representation of a specific embodiment of the present invention, and in this example, along the direction of light propagation, each discrete device is polarizer 1, λ / 4 delay wave plate 2, electro-optic crystal 3, radial symmetric birefringence successively Crystal 4, λ / 4 delay wave plate 5 and analyzer 6 are composed, wherein: the direction of the light-transmitting optical axis of polarizer 1 and analyzer 6 is a vertical direction in the figure, and this direction is defined as a combined device The reference direction, the angle of counterclockwise rotation along the light propagation direction is positive; the slow axis azimuth angle of the λ / 4 delay wave plate 1 is π / 4, and the linearly polarized light incident along the vertical direction is first divided into two polarized component, and delay different phases to ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/28G02F1/03G02B5/30
Inventor 王吉明
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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