Patent ID: 8537367

Claim:
An optical imaging apparatus based on optical frequency domain measurement (OFDM), comprising: a light source for coupling light into a device under test (DUT) having an internal volume and an external surface, the DUT externally radiating light at multiple locations along the external surface of the DUT; a light detector configured to detect externally-radiated light at a first location along the external surface of the DUT over a time period and at a second location along the external surface of the DUT over a time period; OFDM processing circuitry configured to generate light intensity data as a function of time based on an amount of externally-radiated light collected at each of the first and second locations along the external surface of the DUT; a memory configured to store the data for each of the multiple locations along the DUT as part of an image of the external surface of the DUT; and a user interface configured to provide to a user information indicating an amount of externally-radiated light at each of the multiple locations along the DUT based on the stored data.