Scientist just invented a 10 trillion frame per second camera. - Page 1
Forum section: electronics / general

author: BrianHG
author_rank: Super Contributor
timestamp: November 25, 2018, 01:36:50 pm
content: This is getting insane....

author: edy
author_rank: Super Contributor
timestamp: November 25, 2018, 03:27:09 pm
content: This range of fps is nothing new. Just an order of magnitude less was being done back in 2011:http://news.mit.edu/2011/trillion-fps-camera-1213I'm not sure how it works exactly but from what I remember in the 2011 article it is not the same event being filmed. What they do is capture a "frame" each time a pulse is sent through and measure the time (or control very accurately) and then they stitch the images together in the correct order. So imagine they send thousands of laser pulses through the object and each time capture a still shot at a different amount of delay from the start of the pulse... Then stitch in order from smallest delay to largest. It is not same camera or sensor refreshing itself that quickly.Still cool though but has many limitations obviously.[Edit:]They actually use a slit and move it across to capture more and more at each repeat. The way they determine time is not by using a shutter but by taking in photons, converting them to electrons, and then deflecting them by increasing amounts to spread them out spacially to determine time.

author: Sredni
author_rank: Frequent Contributor
timestamp: November 25, 2018, 03:55:35 pm
content: To translate it in EE language, that's the same principle of 'equivalent time sampling' in certain oscilloscopes. As that only works with repetitive waveforms, this will only work with identically repetitive events. I agree it is cool nonetheless.

author: BrianHG
author_rank: Super Contributor
timestamp: November 25, 2018, 08:36:55 pm
content: Quote from: edy on November 25, 2018, 03:27:09 pmThat camera used multiple laser pulses over a long time which were shuttered at different times to get the light positioning in mid travel effect just as described in the video I posted. The new camera listed in the video uses the same laser pulse, but, only a single pulse & the camera captures all the frames instantly as the single pulse travels. This did not exist back in 2011. With this new camera, the exact state and position of the objects being hit with the pulse of light is captured, even if the objects under analysis are moving. This camera works even if the laser pulse eventually disrupted or damages the illuminated objects. The old 2011 camera required the objects being filmed to be stationary and they need to withstand multiple such intense short burst of optical radiation.

author: dexters_lab
author_rank: Unknown
timestamp: November 27, 2018, 03:27:40 pm
content: Quote from: BrianHG on November 25, 2018, 01:36:50 pmneat, had to go off to a few other websites to understand better how this works and it's pretty clever considering it is capturing a single event... i didn't get how the integration of the still and streak cameras work though, it's all woo woostuff:https://www.nature.com/articles/s41377-018-0044-7

author: BrianHG
author_rank: Super Contributor
timestamp: November 27, 2018, 03:45:03 pm
content: Quote from: dexters_lab on November 27, 2018, 03:27:40 pmThanks, that's a great descriptive article.