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Single-photon 3D imaging reaches 10 km range

Encap

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"As the need for more compact, lightweight, covert imaging methods expands for airborne and other portable platforms, single-photon-based time-of-flight (TOF) or light detection and ranging (lidar) imaging systems are gaining in popularity because their high sensitivity allows the use of smaller, lower-power laser systems. Rather than using several-tens-of-milliwatt visible laser sources, silicon single-photon avalanche diode (SPAD) detectors, and pixel-by-pixel readout (pixel-wise) image-processing algorithms, researchers from Leonardo MW and Heriot-Watt University (both in Edinburgh, Scotland) have instead developed a single-photon imaging lidar system that improves on an earlier single-pixel design and uses a 10 mW eye-safe 1550 nm laser, indium gallium arsenide/indium phosphide (InGaAs/InP) SPAD detector, and algorithms specially designed for time-correlated single-photon counting (TCSPC) to image at ranges up to 10.5 km."
From: http://www.laserfocusworld.com/articles/print/volume-53/issue-06/newsbreaks/single-photon-3d-imaging-reaches-10-km-range.html?cmpid=enl_lfw_lfwdetectorsandimagingnewsletter_2017-06-28&email_address=encapsulight@msn.com&eid=288603299&bid=1798959

See also for background on this development:
https://www.osapublishing.org/oe/abstract.cfm?uri=oe-21-7-8904
and
2013, 1km single photon imaging: http://www.laserfocusworld.com/articles/2013/04/single-photon-tof-depth-imaging-1km.html
and
http://www.laserfocusworld.com/articles/print/volume-49/issue-01/features/photon-counting--upconversion-imager-measures-single-mid-ir-phot.html

Laser dependent technlogy Research, Development, Test, & Evaluation marches forward making technological feats thought to be impossible--possible. The rapid technological progress in the field of lasers and related laser applications never cease to surprise and amaze.
 
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Radim

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....

Laser dependent technlogy Research, Development, Test, & Evaluation marches forward making technological feats thought to be impossible--possible. The rapid technological progress in the field of lasers and related laser applications never cease to surprise and amaze.

Exactly. Thanks for sharing, Encap.
 

RedCowboy

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That's impressive but I have some questions, suppose I will have to read a bit.
 

paul1598419

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I subscribe to Laser Focus World also. It is a great source new laser related material. + rep.
 

Benm

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This is interesting stuff, though i'm unsure of what the practical application would be.

Not that it's not very useful on it's own, but how is it superior to systems wel already have?

I love this idea how you could image something 'around a corner' by using photons reflecting off various surfaces. It's quite amazing how a system can see me while i have no means of seeing that system even using night vision equipment and all that.

I suppose one downside is that these systems could pretty easily be jammed with pretty low tech materials. Reminds me of how people attempted to confuse radar-seeking missiles in the yugoslav war by rigging microwave opens to operate with their doors open/removed.

That tactic is by no means foolproof, but when put in terms of money spent it is pretty good: use a $100 piece of consumer equipment to attract a million dollar missile. Keep that up 1000 times or so and the technological superior power may just abandon the effort due to cost :D
 




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