Quality of electro-holographic image measured with Shack-Hartmann wavefront sensor (Conference Presentation)

Jung-Young Son; Min-Sik Park; Min-Chul Park; Hyoung Lee; Jung Kim

doi:10.1117/12.2520734

14 May 2019 Quality of electro-holographic image measured with Shack-Hartmann wavefront sensor (Conference Presentation)

Jung-Young Son, Min-Sik Park, Min-Chul Park, Hyoung Lee, Jung Kim

Author Affiliations +

Proceedings Volume 10997, Three-Dimensional Imaging, Visualization, and Display 2019; 109970N (2019) https://doi.org/10.1117/12.2520734
Event: SPIE Defense + Commercial Sensing, 2019, Baltimore, MD, United States

Abstract

The reconstructed image from digital holography are laden with many distortions. The main cause of these distortions is known as the finite size of pixels in the display panel/chip. Due to this finite size, the starting position of the reconstructed rays in each pixel can be any place in the pixel. Hence the starting position can be different from the recording beam position which is usually considered as the center of each pixel. This difference makes that the reconstructed rays are no longer the phase conjugated rays of their corresponding recording rays. The reconstructed rays are somewhat distorted in their wavefronts. To estimate these wavefront distortions, a Shack-Hartmann wavefront sensor is used in the pathway of the reconstructed beam. The phase distribution obtained with the sensor reveal that the distortion is more for the bigger pixel size and for the images with more reconstructed image points as expected. This result indicates that the sensor is a reasonable method of estimating the distortions in the reconstructed image. The same sensor is also used to estimate the functional performance of holographic optical elements for image projection.

Conference Presentation

Citation Download Citation

Jung-Young Son, Min-Sik Park, Min-Chul Park, Hyoung Lee, and Jung Kim "Quality of electro-holographic image measured with Shack-Hartmann wavefront sensor (Conference Presentation)", Proc. SPIE 10997, Three-Dimensional Imaging, Visualization, and Display 2019, 109970N (14 May 2019); https://doi.org/10.1117/12.2520734

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KEYWORDS

Wavefront sensors

Image sensors

Image quality

3D image reconstruction

Sensors

Digital holography

Digital imaging

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