Verma, Onkar Nath2015-09-182023-10-262015-09-182023-10-262014ROLL NO. 09612130http://172.17.1.107:4000/handle/123456789/382SUPERVISOR: TARAK NATH DEYOptical diffraction of laser beam from finite size of conventional optical devices imposes a fundamental limitations for the creation and detection of sub wave length images.enPHYSICSThesis