Results 41 to 50 of about 28,649 (251)

Exploring shot noise and Laser Doppler imagery with heterodyne holography

, 2012
Heterodyne Holography is a variant of Digital Holography, where the optical frequencies of signal and reference arms can be freely adjusted by acousto-optic modulators.
Atlan, Michael, Gross, Michel, Joud, Fadwa, Verpillat, Frédéric   +3 more
core   +1 more source

Digital phase conjugation of second harmonic radiation emitted by nanoparticles in turbid media [PDF]

, 2010
We demonstrate focusing coherent light on a nanoparticle through turbid media based on digital optical phase conjugation of second harmonic generation (SHG) field from the nanoparticle.
Grange, Rachel, Hsieh, Chia-Lung, Psaltis, Demetri, Pu, Ye   +3 more
core   +2 more sources

Digital Holographic Printing Methods for 3D Visualization of Cultural Heritage Artifacts

Digital Presentation and Preservation of Cultural and Scientific Heritage, 2014
Holography enables capture and reconstruction of the optical field scattered from three-dimensional (3D) objects. The hologram encodes both amplitude and phase of the field under coherent illumination, whereas photography records only the amplitude by ...
Hoonjong Kang, Elena Stoykova, Nataliya Berberova, Jiyong Park, Youngmin Kim, Joo Sup Park, Sunghee Hong, Branimir Ivanov, Dimana Nazarova, Nikola Malinowski   +9 more
doaj   +1 more source

Noise and aliases in off-axis and phase-shifting holography [PDF]

, 2008
We have compared the respective efficiencies of off-axis and phase-shifting holography in terms of noise and aliases removal. The comparison is made by analyzing holograms of an USAF target backlit with laser illumination, recorded with a charge-coupled ...
Ansari, Colomb, Creath, Cuche, Cuche, Gabor, Goodmann, Gross, Guo, Kato, Kreis, LeClerc, Leith, Marquet, Massatsch, Massig, Nomura, Pu, Schnars, Schnars, Tamano, Yamaguchi, Yamaguchi, Yamaguchi, Yamaguchi, Zhang, Zhang   +26 more
core   +2 more sources

Lensfree on-chip microscopy over a wide field-of-view using pixel super-resolution. [PDF]

, 2010
We demonstrate lensfree holographic microscopy on a chip to achieve approximately 0.6 microm spatial resolution corresponding to a numerical aperture of approximately 0.5 over a large field-of-view of approximately 24 mm2.
Bishara, Waheb, Coskun, Ahmet F, Ozcan, Aydogan, Su, Ting-Wei   +3 more
core   +1 more source

Based on incoherent spatial light modulator telescopic experimental research of digital holographic imaging system about “White light”

Results in Optics, 2021
At present, there are few researches about telescopic digital holography (TDH) on the combination of digital holography and telescope technology. Because this technology generally cause low phase shift accuracy and large image reconstruction distance ...
YuCheng Li, Yang Zhang, YongTian Li, YiFeng Wu, Rong Duan   +4 more
doaj  

Super-Bandwidth Two-Step Phase-Shifting Off-Axis Digital Holography by Optimizing Two-Dimensional Spatial Frequency Sampling Scheme

IEEE Access, 2019
The presence of the auto correlation and twin cross correlation noises restrict the available spatial bandwidth of the holographic microscopy to much less than the available bandwidth of the digital sensor.
Behnam Tayebi, Jeong Hoon Park, Jae-Ho Han   +2 more
doaj   +1 more source

On-chip differential interference contrast microscopy using lensless digital holography. [PDF]

, 2010
We introduce the use of a birefringent crystal with lensless digital holography to create an on-chip differential interference contrast (DIC) microscope.
Isikman, Serhan O, Khademhosseinieh, Bahar, Oh, Chulwoo, Ozcan, Aydogan   +3 more
core   +1 more source

Resolution Enhancement of Geometric Phase Self-Interference Incoherent Digital Holography Using Synthetic Aperture

Photonics
Incoherent digital holography is a promising solution for acquiring three-dimensional information in the form of interference without a laser. Self-interference is the principal phenomenon of incoherent holography which splits the incident light wave ...
Youngrok Kim, KiHong Choi, Keehoon Hong, Sung-Wook Min   +3 more
doaj   +1 more source

(DH) Noise and Signal scaling factors in Digital Holography in week illumination: relationship with Shot Noise [PDF]

, 2012
We have performed off axis heterodyne holography with very weak illumination by recording holograms of the object with and without object illumination in the same acquisition run.
Gross, Michel, Lesaffre, Max, Verrier, Nicolas   +2 more
core   +4 more sources