Multiple-plane anisoplanatic phase correction in a laboratory digital holography experiment.
نویسندگان
چکیده
We present results for a digital holography experiment with anisoplanatic image correction through two discrete planes of phase errors. Using a nonlinear optimization technique, we maximize a modified sharpness metric to solve for estimates of the phase errors in the system in the multiple planes where they physically exist. We show that correcting for phase errors in multiple planes gives a superior image to correction in one plane.
منابع مشابه
Correction of anisoplanatic phase errors in digital holography.
The quality of coherent images computed from digital holography or heterodyne array data is sensitive to phase errors of the reference and/or object beams. A number of algorithms exist for correcting phase errors in or very near the hologram plane. In the case of phase errors introduced a nonnegligible distance away from hologram plane, the resulting imagery exhibits anisoplanatism. A feature o...
متن کاملPhase Error Correction for Multiple Planes using Sharpness Metrics
Phase errors introduced in the object beam of a digital hologram degrade the image quality of the object. We present computer simulations showing the effect of multiple planes of phase errors in the propagation path. By using a nonlinear optimization technique to maximize sharpness metrics, we show results that account for aberrations in multiple planes and correct anisoplanatic blur. This pape...
متن کاملPhase-error correction for multiple planes using a sharpness metric.
Phase errors in multiple planes create an anisoplanatic (space-variant) blur in an image. We show how phase errors in multiple planes can be corrected with the use of a sharpness metric for heterodyne or holographic imaging. We derive the theoretical framework necessary for this anisoplanatic imaging situation. A digital simulation and results are presented. We demonstrate the success of this n...
متن کاملHigh-resolution synthetic-aperture digital holography with digital phase and pupil correction.
A 218 mega-pixel synthetic aperture was collected by raster scanning a CCD detector in a digital holography imaging experiment. Frames were mosaicked together using a two-step cross-correlation registration. Phase correction using sharpness metrics were utilized to achieve diffraction-limited resolution.
متن کاملDistortion invariant 3D object recognition using digital holography
We present a method to recognize three-dimensional objects from phase-shift digital holograms. The holograms are used to reconstruct various views of the objects. These views are combined to create nonlinear composite filters in order to achieve distortion invariance. We present experiments to illustrate the recognition of a 3D object in the presence of outof-plane rotation and longitudinal shi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Optics letters
دوره 35 19 شماره
صفحات -
تاریخ انتشار 2010