Correction of Lens Aberration by Holography
There have been several studies on the application of holography to improve the quality of an image which is formed by an optical system. Some of them have been done to improve a lens image correcting the lens aberration with a hologram. These studies are classified into two groups according to the use of holograms. The first group is the method using a conjugate wavefront reconstructed from a hologram in which the wavefront at the pupil of a lens is recorded. Upatnieks1) and Tsuruta2) have studied this method. A hologram is used in this case as an optical spatial filter; therefore this method is referred to hereafter as a holographic filtering method for the correction of lens aberrations. The second group is the method carried out by the authors3). In this case both reference and signal wavefronts are affected by the same amount of phasic deformation caused by lens aberrations, and with these reference and signal waves a hologram is photographed. The interference pattern in this hologram suffers no serious effects from the lens aberrations. As shown later, the properties of a hologram are wellemployed in this method. Therefore, this method is referred to hereafter as a holographic correction method of lens aberrations.
KeywordsCorrected Image Spherical Aberration Lens Image Photographic Plate Wavefront Aberration
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