Patent ID: 8569695

Claim:
A method of imaging a sample, the method comprising: providing a first set of optical pulses and a second set of optical pulses; directing the first set of optical pulses to impinge on a cathode; generating a set of electron pulses in response to the first set of pulses, wherein the set of electron pulses are characterized by a first energy; directing the set of electron pulses to impinge on a sample; directing the second set of optical pulses to impinge on the sample; transmitting the set of electron pulses through the sample, the set of electron pulses transmitted through the sample being representative of an image of the sample; detecting the set of electron pulses transmitted through the sample to provide a data signal as a function of electron energy and associated with the image of the sample, wherein an energy of the set of electron pulses transmitted through the sample is different than the first energy; and transmitting the data signal to an output device.