Differential interference imaging system capable of rapidly changing shear direction and amount

A differential interference imaging system capable of rapidly changing shear direction and amount, comprising:

• a light source,
• a filter,
• a polarizer,
• a sample stage,
• an infinite imaging microobjective,
• a tube lens,
• a shear component,
• an analyzer, and
• an image sensor,
• wherein after light intensity of linearly polarized light emitted from the light source is adjusted through the filter and a polarization direction of the linearly polarized light is adjusted through the polarizer, the linearly polarized light passes through a transparent sample on the sample stage, to be collected by the infinite imaging microobjective and to implement imaging through the tube lens;
• an imaging beam is divided, by the shear component, into two linearly polarized light fields which are perpendicular to each other in the polarization directions and have a shear amount;
• the two linearly polarized light fields are further combined into an interference light filed by the analyzer, so that a differential interference image is formed in the image sensor.