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"Time-Folded Optics" Trades Distance for Time in Ultrafast Photography
Ultrafast photography involves the use of ultrafast camera sensors to capture ultrashort pulses of light. This has allowed for things like capturing billions-to-trillions of Frames Per Second images, scanning through closed books, generating depth maps of 3D scenes, and other applications.
The difficulty of such systems is that, in order to function properly, they are subject to significant design constraints, one of which is that its lens must sit at a distance from an imagining sensor equal to or greater than its focal length to capture images, meaning they require very long lenses.
Now, however, MIT Media Lab Researchers appear to have found a way around this, by swapping out distance for time. They were able to modify a type of ultrafast sensor called a streak camera, so that the light entering the lens system is bounced off a series of small mirrors, at each of which an image is captured, with each image corresponding to a particular length of time and, by correlation, distance from the camera.
Each round trip the light pulse makes through the lens system moves the image focal point closer to the lens, thus allowing for a much more compressed lens system than would be possible through conventional optical techniques. This is especially useful for applications of ultrafast photography over great distances, such as for imaging space, or imaging the ground from space.
#Optics #Photography #StreakCamera
Ultrafast photography involves the use of ultrafast camera sensors to capture ultrashort pulses of light. This has allowed for things like capturing billions-to-trillions of Frames Per Second images, scanning through closed books, generating depth maps of 3D scenes, and other applications.
The difficulty of such systems is that, in order to function properly, they are subject to significant design constraints, one of which is that its lens must sit at a distance from an imagining sensor equal to or greater than its focal length to capture images, meaning they require very long lenses.
Now, however, MIT Media Lab Researchers appear to have found a way around this, by swapping out distance for time. They were able to modify a type of ultrafast sensor called a streak camera, so that the light entering the lens system is bounced off a series of small mirrors, at each of which an image is captured, with each image corresponding to a particular length of time and, by correlation, distance from the camera.
Each round trip the light pulse makes through the lens system moves the image focal point closer to the lens, thus allowing for a much more compressed lens system than would be possible through conventional optical techniques. This is especially useful for applications of ultrafast photography over great distances, such as for imaging space, or imaging the ground from space.
#Optics #Photography #StreakCamera
"Time-Folded Optics" Create New Possibilities for Imaging
scitechdaily.com
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Time-Folded Optics to shrink Camera Lenses https://www.youtube.com/watch?v=QvUGANNDNHY #UltrafastCamera #StreakCamera #imaging
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Eli Fennell
Technology
"Technology is a gift of God." - Freeman Dyson
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Eli Fennell
Technology: For Everything Tech
Welcome, fellow Google+ User!
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Eli Fennell
Jhumka Bai Markandey: Very good
Tony Stark: يا اصدقاء ربحت ايفون😘 من موقع Rob7ak انا ربحت هاتف ايفون 8 الجديد و2 من اصدقائي ربحو لتربح هاتف انت ايضا اكتب في🔍 جوجل Rob7ak وادخل للموقع الاول الموقع له صدقية من جوجل ونسبة الربح كبيرة أانا حبيت افيدكم اكتبو في جوجل Rob7ak وادخلو اول موقع الهاتف يصلك مجانا حتى المنزل
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New Robot Uses Machine Learning To Protect Reefs From Lionfish
Lionfish, once imported to the Atlantic Ocean from the tropics for aquariums, have become an invasive threat to Atlantic coral reef populations. To make matters worse, they're covered in poisonous spines, making them difficult and dangerous for divers to capture or avoid. Hence, it has been difficult to address the threat they pose by attempting to control their spread.
A new type of robot may well be the solution to the problem. Designed by the Worcester Polytechnic Institute, this new type of tiny submersible robot is designed to use Computer Vision, based on Machine Learning of thousands of photos, to identify Lionfish. It can then spear them with one of eight tiny spears, each of which is buoyant, thereby raising the speared fish to the surface.
The robot operates autonomously and untethered, thereby not only being able to operate independently, but also act as a guardian for any human divers present. It is not yet ready for Prime Time, as it still needs to be programmed with a navigation system to enable it to create 3D search grids of its surroundings, but if successful, this new system may both protect human divers, and the invaluable coral reef systems our oceans depend upon, at the same time.
#AI #ArtificialIntelligence #MachineLearning
Spear-toting robot can guard coral reefs against invasive lionfish
Spear-toting robot can guard coral reefs against invasive lionfish
engadget.com
Ebunlomo Oluwatoyin: Wow. Amazing
Katie Jenkins: Jenkins
Hangout...need a serious relationship with a matured mind,then we can exchange numbers.
jenkinskatie20@gmail.com
53s
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Eli Fennell
6d
"Time-Folded Optics" Trades Distance for Time in Ultrafast Photography
Ultrafast photography involves the use of ultrafast camera sensors to capture ultrashort pulses of light. This has allowed for things like capturing billions-to-trillions of Frames Per Second images, scanning through closed books, generating depth maps of 3D scenes, and other applications.
The difficulty of such systems is that, in order to function properly, they are subject to significant design constraints, one of which is that its lens must sit at a distance from an imagining sensor equal to or greater than its focal length to capture images, meaning they require very long lenses.
Now, however, MIT Media Lab Researchers appear to have found a way around this, by swapping out distance for time. They were able to modify a type of ultrafast sensor called a streak camera, so that the light entering the lens system is bounced off a series of small mirrors, at each of which an image is captured, with each image corresponding to a particular length of time and, by correlation, distance from the camera.
Each round trip the light pulse makes through the lens system moves the image focal point closer to the lens, thus allowing for a much more compressed lens system than would be possible through conventional optical techniques. This is especially useful for applications of ultrafast photography over great distances, such as for imaging space, or imaging the ground from space.
#Optics #Photography #StreakCamera
"Time-Folded Optics" Create New Possibilities for Imaging
"Time-Folded Optics" Create New Possibilities for Imaging
scitechdaily.com
P Rafi: Nice
H GOPro: The unknown is awesome
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Adobe Researchers Use Eye Tracking To Create 'Infinite' VR Spaces
One of the biggest challenges of Virtual Reality, is mapping the experience of exploring the simulated world the user is experiencing, onto the real world in which their body is moving around. While one can incorporate a real world obstacle into the simulation, this is difficult to do without disrupting the immersive quality of the experience. Furthermore, some obstacles don't lend themselves very well to this, such as the walls of the room the user is in at that moment. How does one map a large virtual space, onto a small real space, without the user noticing?
Researchers from Adobe believe they have solved this issue now, with a new type of VR System that combined environmental awareness, such as awareness of where physical obstacles are located in the room, with subtle adjustments to the visual perspective synchronized with quick, unconscious eye movements. The result is an artificial environment which adaptively navigates the users in such a way that not only do they avoid walking into obstacles within a room, but even the limits of the room itself go unnoticed, such that one may explore a vast virtual city from the confines of a typical office or even apartment room.
Fans of the Star Trek franchise will recognize this as roughly equivalent to how the Federation Holodecks allow users to feel like they are in a vast open space, from within the confines of what is, in fact, a fairly small cubical room.
The Researchers claim that most users cannot tell a superficial difference between this adjusted simulated space, and a more conventional unadjusted virtual space (i.e. they don't experience the adjusted space as 'less real' or less immersive than the adjusted one), and that it does not create nausea or other issues typical of VR usage.
#VR #VirtualReality #EyeTracking
Eye tracking creates infinite VR space
Eye tracking creates infinite VR space
bbc.com
MsLady Montoya: I don't no.but dude be on some more stuff!!
Kadiri Manisha: i want some
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I've often pondered how #light looks moving. A high-speed processor #streakcamera has finally captured it. (originally saw via +TWiT)
Visualizing Light at Trillion FPS, Camera Culture, MIT Media Lab
web.media.mit.edu
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