In the next step they moved already fabricated central plane array and associated electronics from a silicon wafer to the tensioned membrane that is stretched taut over a drum.
When this tension is free, the membrane attains its formal form. This procedure presses the focal plane arrangement.
As a result of this electrical interconnects, which are especially designed, delaminate from the rubber surface and make arcs, fastened on the ends by detector pixels.
By deforming the shape in this way provide housing for strains created during the planar to hemispherical transformation. This is achieved without stressing the silicon. This theory was practically proven by researchers at Northwestern during mechanics modeling.
The array package is then transfer printed to a matching hemispherical glass substrate. Attaching a lens and connecting the camera to external electronics completes the assembly. The camera has the size and shape of a human eye.
The research is going on since the last 20 years. Many scientists have worked to develop electronic eye systems of this type but none of them succeeded in making a working camera.
Roger said that through optics simulations and imaging examination we came to know that these arrangements a much broader field of view.
Not only this but also enhances illumination uniformity and causes fewer aberrations as compared to flat cameras which are having same type of imaging lenses. Roger is the scientist doing research at the Beckman Institute and at the university’s Frederick Setiz Materials Research Laboratory.
He said that hemispherical sensor arrangements are suitable to use as retinal implants as compared to flat sensing elements. It has the ability to cover superior quality silicon devices onto surfaces complicated in structure and biological tissues. This ability the design of electronic and optoelectronic device gets very interesting and powerful capabilities.