A method and system for correcting non-common optical path errors of an adaptive optics system
A technology of adaptive optics and common light path, applied in the field of optics, can solve problems such as complex structure
Inactive Publication Date: 2015-10-21
BEIJING INSTITUTE OF TECHNOLOGYGY
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This method needs to move the imaging detector through a high-precision translation stage to collect multiple images of the focal plane and the defocused plane, which is relatively complicated in structure
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[0038] In order to make the object, technical solution and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0039] In the embodiment of the present invention, after applying the control voltage to the actuator of the wavefront corrector, the size of the wavefront error is evaluated by the difference of the image quality evaluation function, and when the calculation stop condition is reached, it is determined that the non-common optical path error can be corrected .
[0040] In the adaptive optics system, the image quality evaluation function contains the wavefront error information, and the size of the wavefront error can be evaluated indirectly by calculating the value of the image quality evaluation function. When the control voltage of the deformable mirror actuator is constantly changed, the value of the image quality evaluation functio...
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The invention discloses a method for correcting a non-common path error of an adaptive optical system. The method comprises the steps of: acquiring an image when a control voltage of a wavefront corrector actuator is in an initial value, calculating a first image quality assessment function value of the acquired image; after applying a control voltage to the actuator, acquiring an image again, calculating a second image quality assessment function value of the image acquired newly; re-determining a control voltage initial value of the actuator according to a difference value between the first image quality assessment function value and the second image quality assessment function value and a numerical value zero, re-calculating a first image quality assessment function value and a second image quality assessment function value; when a calculation stopping condition is met, stopping calculating the control voltage initial value f the actuator, and completing the correction of the non-common path error; and when the calculation stopping condition is not met, adding 1 to the iterations t. The invention also discloses a system for correcting the non-common path error of the adaptive optical system. by application of the method and system disclosed by the invention, the non-common path error can be corrected under the conditions of no need of extra devices or a mobile imaging detector.
Description
technical field [0001] The present application relates to the field of optical technology, and more specifically, to a method and system for correcting non-common optical path errors of an adaptive optics system. Background technique [0002] Based on the adaptive optics principle of wavefront compensation, an additional figure 1 The adaptive optics system shown compensates for wavefront distortion to obtain near-diffraction-limited image quality. attached figure 1 The shown adaptive optics system consists of a deformable mirror, a beam splitter, an imaging detector, and a wavefront sensor. Wherein, the wavefront sensor is a Hartmann-Shack sensor. [0003] When the adaptive optics system observes a point target, the light wave emitted by the point target is distorted by external interference during the propagation process. Adaptive optics improves image quality by measuring and correcting wavefront errors. [0004] The adaptive optics system receives the distorted wavef...
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IPC IPC(8): G02B27/00G02B26/06
Inventor 董冰胡新奇喻际
Owner BEIJING INSTITUTE OF TECHNOLOGYGY