1. An interferometric imaging device for imaging a light scattering object comprising: a broadband light source arranged to generate a beam of radiation; a beam divider for separating the beam into reference and sample arms, wherein the sample arm contains the light scattering object to be imaged; optics to focus said beam of radiation to a line focus on the light scattering object to be imaged, said line focus having a long axis and a narrow axis; a detector having a long axis and a narrow axis, wherein the narrow axis provides a confocal selection of light in one dimension corresponding to the line focus on the scattering object to be imaged, said detector including a sensor array; return optics for combining light scattered from the object and light returning from the reference arm and directing the combined light towards the sensor array, wherein the return optics introduce an astigmatism to the combined light beam such that the narrow axis of the line focus is substantially imaged directly to the narrow axis of the detector and such that the line focus is defocused along its long axis on the sensor array; and a processor for generating an image in response to signals generated by the detector.