Phase difference wavefront sensor based on image compensation

Phase difference wavefront sensor based on image compensation

  • CN 106,525,255 A
  • Filed: 10/27/2016
  • Published: 03/22/2017
  • Est. Priority Date: 10/27/2016
  • Status: Active Application
First Claim
Patent Images

1. a kind of phase contrast Wavefront sensor based on image compensation, it is characterised in that:

  • Including attenuator wheel (1), lens (2),BS (spectroscope) (3), a CCD (4) and the 2nd CCD (5), incident ray enter lens, BS Jing after attenuator wheel modulate intensityAfter lens, far field light is divided into into the two-beam of equal intensities, images in a CCD, the 2nd CCD, the first CCD detection respectivelyFocal plane hot spot, the second CCD detection defocused spot;

    Phase contrast Wavefront sensor job step that should be based on image compensation is as follows:

    Step 1:

    According to conventional phase difference method collection focal plane, out of focus face light distribution information, during collection, light intensity peak is slightly below phaseMachine saturation value;

    Step 2:

    Change the light intensity collected on focal plane by a certain percentage, make middle hot spot part reach saturation, obtain anotherTwo focal planes, out of focus face light distribution information;

    Step 3:

    The image that focusing plane, out of focus face collect carries out image mosaic, the light of the mid portion collected using step 1Strong information, replaces collecting the saturation part of image in step 2, obtains brand-new two focal plane, out of focus face by certain proportionImage;

    Step 4:

    According to conventional phase difference restored method, to distorting, corrugated is restored.

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