scholarly journals Digital Incoherent Compressive Holography Using a Geometric Phase Metalens

Sensors ◽  
2021 ◽  
Vol 21 (16) ◽  
pp. 5624
Author(s):  
Jonghyun Lee ◽  
Youngrok Kim ◽  
Kihong Choi ◽  
Joonku Hahn ◽  
Sung-Wook Min ◽  
...  
Keyword(s):  
Numerical Simulations ◽  
Geometric Phase ◽  
Digital Holography ◽  
Image Sensor ◽  
Wavelength Band ◽  
Object Reconstruction ◽  
Spatial Distortion ◽  
Visible Wavelength ◽  
Spatial Calibration ◽  
Compressive Holography

We propose a compressive self-interference incoherent digital holography (SIDH) with a geometric phase metalens for section-wise holographic object reconstruction. We specify the details of the SIDH with a geometric phase metalens design that covers the visible wavelength band, analyze a spatial distortion problem in the SIDH and address a process of a compressive holographic section-wise reconstruction with analytic spatial calibration. The metalens allows us to realize a compressive SIDH system in the visible wavelength band using an image sensor with relatively low bandwidth. The operation of the proposed compressive SIDH is verified through numerical simulations.

scholarly journals Visible Wavelength Color Filters Using Dielectric Subwavelength Gratings for Backside-Illuminated CMOS Image Sensor Technologies

Nano Letters ◽  
2017 ◽  
Vol 17 (5) ◽  
pp. 3159-3164 ◽  
Author(s):  
Yu Horie ◽  
Seunghoon Han ◽  
Jeong-Yub Lee ◽  
Jaekwan Kim ◽  
Yongsung Kim ◽  
...  
Keyword(s):  
Cmos Image Sensor ◽  
Image Sensor ◽  
Visible Wavelength ◽  
Subwavelength Gratings ◽  
Color Filters ◽  
Backside Illuminated

Self-interference digital holography with a geometric-phase hologram lens

2017 ◽  
Vol 42 (19) ◽  
pp. 3940 ◽  
Author(s):  
KiHong Choi ◽  
Junkyu Yim ◽  
Seunghwi Yoo ◽  
Sung-Wook Min
Keyword(s):  
Geometric Phase ◽  
Digital Holography ◽  
Phase Hologram

Bend insensitive optical fiber with ultralow bending loss in the visible wavelength band

2009 ◽  
Vol 34 (24) ◽  
pp. 3830 ◽  
Author(s):  
Pramod R. Watekar ◽  
Seongmin Ju ◽  
Won-Taek Han
Keyword(s):  
Optical Fiber ◽  
Wavelength Band ◽  
Visible Wavelength ◽  
Bending Loss

scholarly journals Wavelength-Selective Phase-Shifting Digital Holography: Color Three-Dimensional Imaging Ability in Relation to Bit Depth of Wavelength-Multiplexed Holograms

2018 ◽  
Vol 8 (12) ◽  
pp. 2410 ◽  
Author(s):  
Tatsuki Tahara ◽  
Reo Otani ◽  
Yasuhiro Takaki
Keyword(s):  
Digital Holography ◽  
3D Imaging ◽  
Dynamic Range ◽  
Three Dimensional ◽  
Image Sensor ◽  
Phase Shifting ◽  
3D Images ◽  
Wavelength Resolution ◽  
The Relationship

The quality of reconstructed images in relation to the bit depth of holograms formed by wavelength-selective phase-shifting digital holography was investigated. Wavelength-selective phase-shifting digital holography is a technique to obtain multiwavelength three-dimensional (3D) images with a full space-bandwidth product of an image sensor from wavelength-multiplexed phase-shifted holograms and has been proposed since 2013. The bit resolution required to obtain a multiwavelength holographic image was quantitatively and experimentally evaluated, and the relationship between wavelength resolution and dynamic range of an image sensor was numerically simulated. The results indicate that two-bit resolution per wavelength is required to conduct color 3D imaging.

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