Extending the field of view by a scattering window in an I-COACH system

Optics Letters
Mani Ratnam RaiJoseph Rosen

Abstract

Interferenceless coded aperture correlation holography (I-COACH) is an incoherent digital holography technique developed to record and reconstruct 3D images of objects without two-wave interference. Herein, we introduce a novel technique to extend the field of view (FOV) of I-COACH beyond the limit imposed by the ratio between the finite area of the image sensor and the magnification of the optical system. Light diffracted from a point object located on the optical axis is modulated by a pseudorandom coded phase mask, and the central part of the point spread hologram (PSH) on the image sensor is recorded. The point object is shifted laterally to predetermined lateral locations in order to collect the exterior parts of the PSH. The recorded PSHs are stitched together to produce a synthetic PSH (SPSH) with an area nine times that of any individual PSH recorded by the image sensor. An object with a lateral extent beyond the FOV limit of the image sensor is placed at the same axial location as the point object, and the object hologram is recorded. The object is reconstructed by a cross-correlation between the zero-padded object hologram and the SPSH. Hence, the object parts beyond the FOV limit of the image sensor are recovered. An...Continue Reading

References

Mar 22, 2007·Optics Letters·Joseph Rosen, Gary Brooker
Jun 30, 2012·Optics Letters·Zeev ZalevskyBahram Javidi
Jul 15, 2016·Optics Express·A VijayakumarJoseph Rosen
May 4, 2017·Applied Optics·A VijayakumarJoseph Rosen
Sep 29, 2017·Optics Letters·Mani Ratnam RaiJoseph Rosen

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Citations

Nov 2, 2019·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Daniel DahanZeev Zalevsky
Mar 4, 2020·Optics Express·Szu-Yu LeeMartin Villiger
Aug 19, 2020·Scientific Reports·Vijayakumar AnandSaulius Juodkazis
Mar 18, 2021·Optics Express·Mani Ratnam Rai, Joseph Rosen
Jul 16, 2021·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Teruyoshi NobukawaNorihiko Ishii

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