A research conducted by various scientists including one from India, have developed a method to make a unique camera which can capture images with vast details without even attaching any kind of long or wide lens, this will result in a new development of telescopes which will be of smaller size and less bulky due to this research. This system is named as “Synthetic Apertures for long-range, sub-diffraction-limited Visible Imaging” – SAVI.
According to the scientists if they start using SAVI then they won’t need any bulky or long lens even no add-on things to take a picture of objects that are far away from the camera. This is a great revolution made by a group of scientists which will re-researched further to make an advanced level of cameras for next generation.
According to the researchers, this prototype which is currently in development stage, will spot illumination by a laser pointer and then it will capture the speckle pattern with the help of multiple advanced camera sensors. Then they will feed the raw data from multiple cameras set in different positions which will be interpreted by a special build computer programme which will result in a high-resolution image made with a special complicated process.
This technique is similar to that like we got that matrix special effect by taking multiple images with different multiple cameras. Also, the single camera is moved between shots instead of taking shots with many in a sequence. This prototype will need something like laser which is coherent illumination source.
According to researchers, this is a major step towards a SAVI featured camera array which will be made for using invisible light. The researchers also said that the speckles would work as a reference beam and they will try to replace single one from a couple of beams used to create a hologram. Researchers also added that on illuminating a laser on a rough surface, human eye would see grain type of speckles inside the dot, as few rays of light are reflecting and coming back because they are hit on a rough surface also the scattered points will go farther from the surface and it will throw a collective wave out of that phase. This effect can me created through an interference of a little texture of paper or also a fingerprint can help us to perform that.
Ashok Veeraraghavan of Rice University stated that ‘Today, the technology can be applied only to coherent light’. This statement helps us to explain that we cannot use this technique to take photos in a normal situation like you can’t click it in outdoors also you cannot increase the resolution of the photograph with this method. Also, it clears that for a traditional camera, a larger size of the aperture will result in a higher resolution for the picture.
According to the researchers, if we want an aperture that is sized around 6 inches then we may require a set of 30 glass surface to remove aberrations, and this will result in a spot which can be focused. This method will make the lens huge and bulky. To prevent this, we can use SAVI by replacing a long lens with a computer programme which will resolve the speckle data from an image.
Veeraraghavan also stated that if we use this method, we will be able to capture interference patterns from a long distance. This research was also published in a famous journal Science Advances.