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Camera freezes time at 10 trillion frames per second

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Re: Camera freezes time at 10 trillion frames per second

#3

Post by degenerate »

It doesn't really capture 10 trillion frames per second. The laser pulses at a regular interval, and the combination of the regular pulsing + multiple pictures taken at different points along those pulses makes for 10 trillion distinct frames captured within the timeframe of 1 second. There is no actual video captured.

I get that being a tech journalist is difficult, you have to juggle between the tech and the layman. But after writing a headline, read it back to yourself and ask: will this put the wrong idea in people's minds? If the answer is yes, rewrite it... even if it sounds less cool.

Re: Camera freezes time at 10 trillion frames per second

#4

Post by thanatos_dem »

ttty wrote: post #2

Where is the video? That's what I'm looking for

Here’s a video from 2011, but it’s only at 1 trillion FPS using the same laser pulse approach - https://m.youtube.com/watch?v=-fSqFWcb4rE

Also, the music is pretty cringey, so I’d just leave it muted...

Re: Camera freezes time at 10 trillion frames per second

#5

Post by endorphone »

degenerate wrote: post #3

It doesn't really capture 10 trillion frames per second. The laser pulses at a regular interval, and the combination of the regular pulsing + multiple pictures taken at different points along those pulses makes for 10 trillion distinct frames captured within the timeframe of 1 second. There is no actual video captured. I get that being a tech journalist is difficult, you have to juggle between the tech and the layman…

I don't quite understand how your original point refutes the headline. They are saying that it captures frames at a rate that, measured in seconds, would be ten trillion frames per second.

The headline seems entirely accurate.

Re: Camera freezes time at 10 trillion frames per second

#6

Post by magicalhippo »

ttty wrote: post #2

Where is the video? That's what I'm looking for

There's some cool videos at the end of this article. Not the article posted, but similar concept if I understood correctly.

Observation of laser pulse propagation in optical fibers with a SPAD camera

https://www.nature.com/articles/srep43302

http://i.giphy.com/3og0IQ5k6PP9KspN9m.gif (gif version of one of the mov files)

Re: Camera freezes time at 10 trillion frames per second

#8

Post by zellyn »

degenerate wrote: post #3

It doesn't really capture 10 trillion frames per second. The laser pulses at a regular interval, and the combination of the regular pulsing + multiple pictures taken at different points along those pulses makes for 10 trillion distinct frames captured within the timeframe of 1 second. There is no actual video captured. I get that being a tech journalist is difficult, you have to juggle between the tech and the layman…

They mentioned that in some of the use cases, the thing they're imaging is so fragile that it can only tolerate one laser pulse. So I don't think you're correct.

Re: Camera freezes time at 10 trillion frames per second

#9

Post by [deleted] »

endorphone wrote: post #5
degenerate wrote: post #3

It doesn't really capture 10 trillion frames per second. The laser pulses at a regular interval, and the combination of the regular pulsing + multiple pictures taken at different points along those pulses makes for 10 trillion distinct frames captured within the timeframe of 1 second. There is no actual video captured. I get that being a tech journalist is difficult, you have to juggle between the tech and the layman…

I don't quite understand how your original point refutes the headline. They are saying that it captures frames at a rate that, measured in seconds, would be ten trillion frames per second. The headline seems entirely accurate.

[deleted]

Re: Camera freezes time at 10 trillion frames per second

#10

Post by crispyambulance »

degenerate wrote: post #3

It doesn't really capture 10 trillion frames per second. The laser pulses at a regular interval, and the combination of the regular pulsing + multiple pictures taken at different points along those pulses makes for 10 trillion distinct frames captured within the timeframe of 1 second. There is no actual video captured. I get that being a tech journalist is difficult, you have to juggle between the tech and the layman…

The technique of making "ultrafast" movies of repeating phenomena by imaging "one pixel" at a time and then assembling the raster-scan of all the pixels has been used for a long time.

The technique described in the paper is different from that....

    > Thus far, established ultrafast imaging
    > techniques either struggle to reach the
    > desired exposure time or require repeatable
    > measurements. We have developed 
    > single-shot 10-trillion-frame-per-second 
    > compressed ultrafast photography (T-CUP),
    > which passively captures dynamic events with
    > 100-fs frame intervals in a single camera exposure.
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