Patent ID: 9541749
Date: 2017-01-10
CPC Classifications: G02B

Claim:
1. An optical imaging system comprising: an incoherent light source configured to provide an incoherent optical signal; at least two diffusers having distinct sets of primary spatial frequency compositions and configured to modulate the incoherent optical signal with a spatially random pattern as the incoherent optical signal propagates through the at least two diffusers to provide a diffused spatially random incoherent optical signal, the at least two diffusers being further configured to rotate about an axis parallel to a primary optical axis of the optical imaging system to avoid correlation between successive image frames of the diffused spatially random incoherent optical signal; a first focusing lens positioned along the primary optical axis between the incoherent light source and the at least two diffusers, the first focusing lens being configured to focus the incoherent optical signal onto the at least two diffusers; a collimating lens positioned along the primary optical axis and configured to receive and collimate the diffused spatially random incoherent optical signal; a beam splitter configured to receive the diffused spatially random incoherent optical signal from the collimating lens and to direct a first optical signal toward a sample object, the first optical signal corresponding to at least a portion of the diffused spatially random incoherent optical signal; an objective lens configured to receive the first optical signal from the beams splitter, to focus the first optical signal onto the sample object, to receive and collimate a reflected signal from the sample object, and to direct the reflected signal to the beam splitter, the reflected signal corresponding to at least a portion of the first optical signal including an image of the sample object superimposed thereon; an image capture device configured to receive the the reflected signal, the beam splitter being further configured to direct the reflected signal to the image capture device; and a processor coupled to the image capture device and configured to perform digital image processing on the reflected signal to obtain the image of the sample object.