Patent ID: 7087902
Filing Date: 2006-08-08
Classification: G01N,G02B

Abstract:
1. A method for tomographic imaging of an object, the method comprising the steps of: (a) aligning in a path a radiation source adapted to emit radiation to which the object is essentially transparent, a binary lens having a frequency-dependent focal length, and a sensor for sensing radiation modified by the object, the sensor positioned to capture an image projected by said lens with frequency-dependent focal length onto a fixed image plane; wherein said frequency, said lens and said fixed image plane are selected such that: (b) placing the object in the path between the radiation source and the lens at z=z (c) creating an nth frequency-dependent image of an nth slice of the object in a plane perpendicular to the path using radiation at an nth frequency and capturing the nth frequency-dependent image with the sensor, for n equal to 1 through m, inclusive, where m equals an integer greater than or equal to 2; and (d) reconstructing a 3 dimensional tomographic image of said object by assembling the m frequency-dependent images of the object according to their magnification factors.