AI Article Synopsis
- Application of computer-generated holography improves optical interferometry and 3D image display, but it suffers from encoding errors during hologram creation.
- A proposed correction method using least-squares fitting successfully reduces these encoding errors, as demonstrated through experiments with liquid crystal spatial light modulators.
- The study finds that correcting encoding errors decreases overall wavefront reconstruction errors significantly more than correcting optical system errors, ultimately enhancing the accuracy of wavefront generation.
Article Abstract
Application of computer-generated holography for wavefront generation is beneficial for optical interferometry and 3D image display. However, there is a noticeable encoding error in computer-generated holograms, which is encoded by using the object's wavefront function in a computer. The encoding error will be transmitted and amplified during fabrication of a hologram, which can cause a reconstructed error in the generated wavefront. A correction method of encoding errors based on the least-squares fitting is proposed. A validating experiment is completed by using a liquid crystal spatial light modulator to reconstruct a group of paraboloid wavefronts. The results show that encoding errors increase the reconstructed error of a wavefront less than optical system errors, and the root-mean-square value drops 0.022λ after the correction of the encoding error, but it falls 0.092λ after the correction of optical system errors. The total error has been reduced by 0.114λ. This research is helpful for prediction of encoding errors and improvement of wavefront reconstruction accuracy.
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| http://dx.doi.org/10.1364/AO.55.002701 | DOI Listing |
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