Adaptive optical system wavefront tilt composite correction device and control method
A technology of adaptive optics and wavefront tilt, which is applied in optics, optical components, instruments, etc., can solve problems such as easy coupling of tilted mirrors and deformable mirrors, unstable closed-loop system, etc., to achieve lower requirements, fast response speed, and large stroke Effect
Active Publication Date: 2020-11-13
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, to provide a composite wavefront tilt correction device and control method for an adaptive optics system, which uses a combination of a tilting mirror and a deformable mirror to correct the wavefront tilt, and solves the wavefront tilt through the time-frequency domain solution. The coupling control method is used to solve the problem that the closed-loop instability of the system is caused by the easy coupling between the tilting mirror and the deforming mirror
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[0025] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0026] The illustration of this embodiment is as figure 1 As shown, an adaptive optical system wavefront tilt compound correction device includes a tilt mirror 1, a first relay optical system 2, a deformable mirror 3, a second relay optical system 4, a wavefront tilt detector 5, and an industrial computer 6. Tilt mirror high-voltage amplifier 7 and deformable mirror high-voltage amplifier 8; wherein,
[0027] The incident light is firstly reflected by the tilting mirror 1, enters the first relay optical system 2, is reflected by the deformable mirror 3, enters the second relay optical system 4, and finally enters the wavefront tilt detector 5;
[0028] The frequency response curves of tilting mirror 1 and deforming mirror 3 are as follows figure 2 shown. Wherein, the first-order resonance frequency of the tilting mirror 1 is 300 Hz, and t...
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The invention provides an adaptive optical system wavefront tilt composite correction device and a control method, the device comprises a tilting mirror, a relay optical system, a deformable mirror, awavefront tilt detector, an industrial control computer, a tilting mirror high-voltage amplifier, a deformable mirror high-voltage amplifier and the like, and the device is characterized in that wavefront tilt is corrected by using the combination of the tilting mirror and the deformable mirror. In an adaptive optical system, a driver of the tilting mirror is generally large in stroke but low inresponse speed; a driver of the deformable mirror is small in stroke but high in response speed. A conventional adaptive optical system generally only uses a tilting mirror for wavefront tilt correction, and the deformable mirror is only used for the correction of defocusing, astigmatism and other high-order aberrations. According to the invention, the wavefront tilt is corrected by using the combination of the tilting mirror and the deformable mirror, and the problem of unstable system closed loop caused by easy coupling between the tilting mirror and the deformable mirror is solved through atime-frequency domain decoupling control method. The device and the method have the characteristics of large stroke and quick response and are beneficial to the improvement of the correction precision of wavefront tilt.
Description
technical field [0001] The invention relates to a wavefront tilt correction device and a control method of an adaptive optics system, in particular to a composite correction device and a control method for a wavefront tilt of an adaptive optics system based on a combination of a tilting mirror and a deformable mirror. Background technique [0002] Adaptive optics systems typically include two types of wavefront correctors: tilted mirrors and deformable mirrors. Among them, the tilt mirror is usually used to correct the wavefront tilt; the deformable mirror is usually used to correct higher-order aberrations such as defocus and astigmatism above the tilt. When the adaptive optics system is working in a closed loop, it is generally required that the tilt mirror and the deformable mirror perform strict aberration separation during correction, that is, the deformable mirror cannot produce tilt aberration output when correcting high-order aberrations, otherwise it will easily lea...
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IPC IPC(8): G02B27/00
CPCG02B27/0068
Inventor 郭友明魏凯张雨东鲜浩张学军
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI