Swept-Angle Synthetic Wavelength Interferometry

• URL: http://arxiv.org/abs/2205.10655v4
• Date: Wed, 29 Mar 2023 19:06:36 GMT
• Title: Swept-Angle Synthetic Wavelength Interferometry
• Authors: Alankar Kotwal and Anat Levin and Ioannis Gkioulekas
• Abstract summary: We present a new imaging technique, swept-angle synthetic wavelength interferometry, for full-field micron-scale 3D sensing. Our technique uses light consisting of two narrowly-separated optical wavelengths, resulting in per-pixel interferometric measurements. We build an experimental prototype, and use it to demonstrate these capabilities by scanning a variety of objects.
• Score: 22.706332189135242
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We present a new imaging technique, swept-angle synthetic wavelength interferometry, for full-field micron-scale 3D sensing. As in conventional synthetic wavelength interferometry, our technique uses light consisting of two narrowly-separated optical wavelengths, resulting in per-pixel interferometric measurements whose phase encodes scene depth. Our technique additionally uses a new type of light source that, by emulating spatially-incoherent illumination, makes interferometric measurements insensitive to aberrations and (sub)surface scattering, effects that corrupt phase measurements. The resulting technique combines the robustness to such corruptions of scanning interferometric setups, with the speed of full-field interferometric setups. Overall, our technique can recover full-frame depth at a lateral and axial resolution of 5 microns, at frame rates of 5 Hz, even under strong ambient light. We build an experimental prototype, and use it to demonstrate these capabilities by scanning a variety of objects, including objects representative of applications in inspection and fabrication, and objects that contain challenging light scattering effects.

Related papers

• "Super-resolution" holographic optical tweezers array [0.0]
  We introduce a hologram design method based on the optimisation of a nonlinear cost function using a holographic phase pattern. We confirm a spot interval of 0.952(1) $mu$m in a $5 times 5$ multispot pattern on the focal plane of a high-numerical-aperture (0.75) objective. The proposed method is expected to advance laser fabrication, scanning laser microscopy, and cold atom physics, among other fields.
  arXiv  Detail & Related papers  (2024-11-06T00:00:21Z)
• Super-resolution imaging based on active optical intensity interferometry [14.452089688779049]
  In contrast to amplitude (phase) interferometry, intensity interferometry exploits the quantum nature of light to measure the photon bunching effect in thermal light. In outdoor environments, we image two-dimension millimeter-level targets over 1.36 kilometers at a resolution of 14 times the diffraction limit of a single telescope.
  arXiv  Detail & Related papers  (2024-04-24T06:51:01Z)
• Spatial super-resolution in nanosensing with blinking emitters [79.16635054977068]
  We propose a method of spatial resolution enhancement in metrology with blinking fluorescent nanosensors. We believe that blinking fluorescent sensing agents being complemented with the developed image analysis technique could be utilized routinely in the life science sector.
  arXiv  Detail & Related papers  (2024-02-27T10:38:05Z)
• Two-colour spectrally multimode integrated SU(1,1) interferometer [77.34726150561087]
  We develop and investigate an integrated multimode two-colour SU (1,1) interferometer that operates in a supersensitive mode. By ensuring a proper design of the integrated platform, we suppress dispersion and thereby significantly increase the visibility of the interference pattern. We demonstrate that such an interferometer overcomes the classical phase sensitivity limit for wide parametric gain ranges, when up to $3*104$ photons are generated.
  arXiv  Detail & Related papers  (2022-02-10T13:30:42Z)
• Optical-domain spectral super-resolution via a quantum-memory-based time-frequency processor [0.0]
  We exploit the full spectral information of the optical field in order to beat the Rayleigh limit in spectroscopy. We employ an optical quantum memory with spin-wave storage and an embedded processing capability to implement a time-inversion interferometer for input light. Our tailored measurement achieves a resolution of 15 kHz and requires 20 times less photons than a corresponding Rayleigh-limited conventional method.
  arXiv  Detail & Related papers  (2021-06-08T15:35:41Z)
• Centimeter-Wave Free-Space Time-of-Flight Imaging [25.15384123485028]
  We propose a computational imaging method for all-optical free-space correlation before photo-conversion that achieves micron-scale depth resolution. We propose an imaging approach with resonant polarization modulators and devise a novel optical dual-pass frequency-doubling which achieves high modulation contrast at more than 10GHz. We validate the proposed method in simulation and experimentally, where it achieves micron-scale depth precision.
  arXiv  Detail & Related papers  (2021-05-25T01:57:10Z)
• Towards probing for hypercomplex quantum mechanics in a waveguide interferometer [55.41644538483948]
  We experimentally investigate the suitability of a multi-path waveguide interferometer with mechanical shutters for performing a test for hypercomplex quantum mechanics. We systematically analyse the influence of experimental imperfections that could lead to a false-positive test result.
  arXiv  Detail & Related papers  (2021-04-23T13:20:07Z)
• Spectrally multimode integrated SU(1,1) interferometer [50.591267188664666]
  The presented interferometer includes a polarization converter between two photon sources and utilizes a continuous-wave (CW) pump. We show that this configuration results in almost perfect destructive interference at the output and supersensitivity regions below the classical limit.
  arXiv  Detail & Related papers  (2020-12-07T14:42:54Z)
• Correlation Plenoptic Imaging between Arbitrary Planes [52.77024349608834]
  We show that the protocol enables to change the focused planes, in post-processing, and to achieve an unprecedented combination of image resolution and depth of field. Results lead the way towards the development of compact designs for correlation plenoptic imaging devices based on chaotic light, as well as high-SNR plenoptic imaging devices based on entangled photon illumination.
  arXiv  Detail & Related papers  (2020-07-23T14:26:14Z)
• Robust interferometric sensing using two-photon interference [0.0]
  We show that non-classical interference can provide a path towards robust interferometric sensing. Our results show that non-classical interference can provide a path towards robust interferometric sensing.
  arXiv  Detail & Related papers  (2020-05-11T17:07:11Z)
• Multidimensional synthetic chiral-tube lattices via nonlinear frequency conversion [57.860179997051915]
  We propose and experimentally realize all-optical synthetic dimensions involving specially tailored simultaneous short- and long-range interactions. We implement a synthetic gauge field with nonzero magnetic flux and observe the associated multidimensional dynamics of frequency combs.
  arXiv  Detail & Related papers  (2020-02-20T07:08:35Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.