Optical interference imaging device and its application

A device comprising:

• an illumination module configured to provide a source light to an optical interference module;
• an interference objective module which handles light from the optical interference module and processes light signal generated from a sample;
• a two-dimensional camera to receive a backscattered interference signal from the sample;
• and a data processing module for analyzing light signals and providing a sample imaging, wherein device is configured to make the objective to accept incident light in an arrangement having a focal spot of the incident light between a focal plane and a principal plane of the objective, wherein the focal spot of the incident light is offset from the optical axis of the objective, which makes the stray light focus on the edge and outside an imaging range of the two-dimensional camera.