Telescopes may get lighter as there won’t be any need for longer lenses if a recent invention by a scientist of Indian origin, Ashok Veeraghavan of Rice University, United States, can be applied in future. An exceptional camera has been developed by this scientist with the help of a newly developed technology known as SAVI or “Synthetic Apertures for long-range, sub-diffraction-limited Visible Imaging.” With this technology, capturing images of distant objects will be possible without any long lenses.
The mechanism behind the working of this type of camera will be based on a laser which will illuminate a particular spot and the ‘speckle’ pattern will be captured immediately with the help of the prototype developed by the researchers. Afterward, the raw images taken from several camera positions are fed into the computer which then works upon the images, programs the same by giving high-resolution touches and finally outputs a perfect image.
The device developed has been tested by the researchers along with those from the Rice University in the US, and this also does the comparison work of the various interference patterns between different speckled images. However, the appropriate working of the prototype will be possible only with coherent illumination sources such as laser beams.
Moreover, instead of taking multiple shots at once, this camera gives results by movement of the camera in between the shots so that images are captured from different angles just like the ‘Matrix’ effect. Hence, outdoor images won’t come under the purview of this camera as of now because better resolution requires larger aperture and hence, a longer lens. But the SAVI technology can very well be applied in creating holograms as it allows capturing of interference patterns from a reasonable distance.