Have you ever heard about a Camera that can even capture the photons at a very fast rate of Trillion-Frame-Per-Second ? Yes, you heard it right. Now we can capture the video of the fastest known particle in the universe, the photons. This virtual slow motion camera captures the video of photons traversing through space. This high-speed camera is more than enough to produce a slow motion video of light travelling through objects.
The camera consists of an array of 500 sensors, which are triggered at almost trillions of a second delay. Titanium sapphire laser is used as the light source in this camera. The works upon an innovative technology called the streak camera.
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According to the details available on the MIT website, "The system relies on streak camera, deployed in a totally unexpected way. The aperture of the streak camera is a narrow slit. Particles of light--photons--enter the camera through the slit and pass through an electric field that deflects them in a direction perpendicular to the slit. Because the electric field is changing very rapidly, it deflects late-arriving photons more than it does early-arriving ones. The image produced by the camera is thus two-dimensional, but only one of the dimensions--the one corresponding to the direction of the slit--is spatial. The other dimension, corresponding to the degree of deflection, is time. The image thus represents the time of arrival of photons passing through a one-dimensional slice of space."
Since the basics of consumer photography depends on lighting effects, photographers have faced a lot of difficulties setting expensive and sophisticated light sources at the correct angles. This device can ease these problems as it can capture photons that are moving through space, and analyze its movement. This helps the photographer to develop better photos, rather than the ones that were caught with lighting effects, by installing expensive light sources. By using this camera, we can analyze how light will scatter inside the human body.
The camera can be used in laboratories where the motion of light needs to be captured. But there is a serious drawback in the camera. The statement says, "To produce their super-slow-mo videos, Velten, Media Lab Associate Professor Ramesh Raskar and Moungi Bawendi, the Lester Wolfe Professor of Chemistry, must perform the same experiment--such as passing a light pulse through a bottle--over and over, continually repositioning the streak camera to gradually build up a two-dimensional image. Synchronising the camera and the laser that generates the pulse, so that the timing of every exposure is the same, requires a battery of sophisticated optical equipment and exquisite mechanical control. It takes only a nanosecond--a billionth of a second--for light to scatter through a bottle, but it takes about an hour to collect all the data necessary for the final video. For that reason, Raskar calls the new system the world's slowest fastest camera."
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