An off-axis interferometric system (100, 100', 300, 400) comprising: an optical element (120; 402) being configured for illuminating the sample from at least six different illumination angles other than normal incidence such that each of at least six optically compressed off-axis holograms encodes a different spatial frequency range of the sample; a first beam splitter being configured and operable for receiving at least six beams defining a common optical path and dividing the common optical path into a sample arm and reference arm; first and second phase delay plates (106A and 106B; 302 and 304) placed in the optical path of the sample and reference arms respectively, wherein the first phase delay plate is placed upstream of a sample and the second phase delay plate is configured and operable to receive at least six beams of the reference arm; wherein the first and second phase delay plates are configured and operable to induce a phase delay between each of the at least six beams to encode each of the at least six beams with a different fringe orientation and preventing the at least six beams from interfering with each other, thereby creating at least six parallel interference channels having different interference orientations on a detector; and a different phase delay between the at least six beams of the reference and sample arms; and a second beam splitter/combiner placed downstream of the second phase delay plate and being configured and operable for receiving at least six delayed reference beams and at least six delayed sample beams being indicative of the sample and combining them accordingly, such that the off-axis interferometric system is configured and operable to compress at least six parallel complex wavefronts into a single multiplexed off-axis hologram containing linear off-axis fringes of at least six different orientations. an optical element (120; 402) being configured for illuminating the sample from at least six different illumination angles other than normal incidence such that each of at least six optically compressed off-axis holograms encodes a different spatial frequency range of the sample; a first beam splitter being configured and operable for receiving at least six beams defining a common optical path and dividing the common optical path into a sample arm and reference arm; first and second phase delay plates (106A and 106B; 302 and 304) placed in the optical path of the sample and reference arms respectively, wherein the first phase delay plate is placed upstream of a sample and the second phase delay plate is configured and operable to receive at least six beams of the reference arm; wherein the first and second phase delay plates are configured and operable to induce a phase delay between each of the at least six beams to encode each of the at least six beams with a different fringe orientation and preventing the at least six beams from interfering with each other, thereby creating at least six parallel interference channels having different interference orientations on a detector; and a different phase delay between the at least six beams of the reference and sample arms; and a second beam splitter/combiner placed downstream of the second phase delay plate and being configured and operable for receiving at least six delayed reference beams and at least six delayed sample beams being indicative of the sample and combining them accordingly, such that the off-axis interferometric system is configured and operable to compress at least six parallel complex wavefronts into a single multiplexed off-axis hologram containing linear off-axis fringes of at least six different orientations.