System and method for monitoring a sample

A system for use in monitoring an object, the system comprising:

• a collection unit arranged for defocused collection of light returning from a selected region on the object and comprising at least one rolling shutter detector array and an optical arrangement, the optical arrangement comprises an image multiplying unit configured for duplicating collected images onto two or more regions of the detector array;
• and image data collection circuitry configured comprising analog to digital conversion module, said image data collection circuitry is configured for receiving analog electronic signals associated with data piece collected by pixels of the two or more regions of the detector array and for generating output digital associated with conversion of combined data collected in said two or more regions of the detector array.

20-21. (canceled)