collapse

Author Topic: New quantum camera capable of snapping photos of 'ghosts'  (Read 2435 times)

Offline astr0144

  • The Roundtable
  • Hero Member
  • *****
  • Posts: 5000
  • Gold 343
New quantum camera capable of snapping photos of 'ghosts'
« on: August 28, 2014, 05:49:48 am »
New quantum camera capable of snapping photos of 'ghosts'


Spooky quantum cameras can capture images from photons that never encountered the objects

By utilizing a process that Einstein famously called "spooky," scientists have successfully caught "ghosts" on film for the first time using quantum cameras.
 
The "ghosts" captured on camera weren't the kind you might first think; scientists didn't discover the wandering lost souls of our ancestors. Rather, they were able to capture images of objects from photons that never actually encountered the objects pictured. The technology has been dubbed "ghost imaging," reports National Geographic.
 
Normal cameras work by capturing light that bounces back from an object. That's how optics are supposed to work. So how can it be possible to capture an image of an object from light if the light never bounced off the object? The answer in short: quantum entanglement.



http://www.mnn.com/green-tech/research-innovations/stories/new-quantum-camera-capable-of-snapping-photos-of-ghosts

Offline Canine

  • Jr. Member
  • **
  • Posts: 147
  • Gold 10
  • https://www.youtube.com/watch?v=Z4OhbzSFpnk
Re: New quantum camera capable of snapping photos of 'ghosts'
« Reply #1 on: January 26, 2024, 08:58:58 am »
They now have a 3d version of this tech

Quote
Previous setups for quantum ghost imaging were not capable of 3D imaging because they relied on intensified charge-coupled device (ICCD) cameras. Although these cameras have good spatial resolution, they are time-gated and don’t allow the independent temporal detection of single photons.

To solve this problem, the researchers developed a setup based on new single photon avalanche diode (SPAD) arrays developed for LiDAR and medical imaging. These detectors have multiple independent pixels with dedicated timing circuitry, which allows them to record the detection time of every pixel with picosecond resolution.

The new approach uses two entangled photons — a signal and an idler — to obtain 3D images with single photon illumination. This involves directing the idler photons onto the object and then detecting the backscattered photons in time. Meanwhile, the signal photons are directed to a dedicated camera that detects as many photons as possible in both time and space. The researchers then compared the time of detection of every pixel with the detection of the single-pixel detector to reconstruct the entanglement. This also allowed them to determine the time of flight of the interacting idler photons, and with that, the depth of the object.

https://www.optica.org/about/newsroom/news_releases/2023/august/researchers_use_spad_detector_to_achieve_3d_quantu/


And they have refined it significantly, for security purposes:

Quote
ABSTRACT Computational ghost imaging (CGI) is a method of acquiring object information by measuring
light field intensity, which would be used to achieve imaging in a complicated environment. The main issue
to be addressed in CGI technology is how to achieve rapid and high-quality imaging while assuring the secure
transmission of detection data in practical distant imaging applications. In order to address the mentioned
issues, this paper proposes a remote secure CGI method based on quantum communication technology.
Using the quantum key distribution (QKD) network, the CGI system can be reconstructed while solving the
problem of information security transmission between the detector and the reconstructed computing device.
By exploring the influence of different random measurement matrices on the quality of image reconstruction,
it is found that the randomness of the numerical sequence constituting the matrix is positively correlated
with the imaging quality. Based on this discovery, a new type of quantum cryptography measurement
matrix is constructed using quantum cryptography with good randomness. In addition, through further
orthogonalization and normalization of the matrix, the matrix has both good randomness and orthogonality,
and high-quality imaging results can be obtained at a low sampling rate. The feasibility and effectiveness of
the method are verified by simulation imaging experiments. Compared with the traditional GI system, the
method proposed in this paper has higher transmission security and high-quality imaging under this premise,
which provides a new idea for the practical development of CGI technology

https://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=9684435

 


Wal-Mart.com USA, LLC
affiliate_link
Free Click Tracking
Wal-Mart.com USA, LLC

* Recent Posts

Re: kits to feed your family for a year by Shasta56
[March 17, 2024, 12:40:48 pm]


Re: kits to feed your family for a year by space otter
[March 16, 2024, 08:45:27 pm]


Re: kits to feed your family for a year by Shasta56
[March 16, 2024, 07:24:38 pm]


Re: kits to feed your family for a year by space otter
[March 16, 2024, 10:41:21 am]


Re: Full Interview - Lance Corporal Jonathan Weygandt (1997) by RUSSO
[March 12, 2024, 07:22:56 pm]


Re: Full Interview - Lance Corporal Jonathan Weygandt (1997) by RUSSO
[March 09, 2024, 03:25:56 am]


Re: Full Interview - Lance Corporal Jonathan Weygandt (1997) by RUSSO
[March 09, 2024, 02:33:38 am]


Re: Music You Love by RUSSO
[March 09, 2024, 01:10:22 am]


Re: The Man Who Built UFOs For The CIA (Not Bob Lazar!) by RUSSO
[March 09, 2024, 12:14:14 am]


Re: Full Interview - Lance Corporal Jonathan Weygandt (1997) by RUSSO
[March 09, 2024, 12:08:46 am]


Re: A peculiar stone in DeForest by Canine
[March 03, 2024, 11:54:22 am]


Re: The Man Who Built UFOs For The CIA (Not Bob Lazar!) by kevin
[March 03, 2024, 11:30:06 am]


Re: The Man Who Built UFOs For The CIA (Not Bob Lazar!) by kevin
[March 03, 2024, 11:21:15 am]


Re: The Man Who Built UFOs For The CIA (Not Bob Lazar!) by kevin
[March 03, 2024, 11:16:05 am]


Re: Music You Love by RUSSO
[March 02, 2024, 07:58:09 pm]


Re: Full Interview - Lance Corporal Jonathan Weygandt (1997) by RUSSO
[March 02, 2024, 07:50:59 pm]


Re: The Man Who Built UFOs For The CIA (Not Bob Lazar!) by RUSSO
[March 02, 2024, 07:43:03 pm]


Re: The Man Who Built UFOs For The CIA (Not Bob Lazar!) by RUSSO
[March 02, 2024, 07:41:30 pm]


Re: The Man Who Built UFOs For The CIA (Not Bob Lazar!) by kevin
[March 01, 2024, 11:54:23 am]


Re: The Man Who Built UFOs For The CIA (Not Bob Lazar!) by kevin
[March 01, 2024, 11:34:15 am]