Patent ID: 11885616
Assignee: NOKIA TECHNOLOGIES OY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 15:
16. An apparatus comprising:
illumination control circuitry configured to cause illumination of different areas of a sample with an optical frequency imaging beam at different positions at different times, wherein adjacent positions are configured to cause the corresponding areas to have portions which at least partially overlap; and
signal processing circuitry configured to process signals indicative of back-scattering of the optical frequency imaging beam from the sample at the different times to obtain an image of the sample, wherein processing the signals compensates for phase variations between the different positions at the different times using a matched filter derived from a scattering model of the sample, and at least partially adds images of the different areas together which have the overlap portions,
wherein the different areas lie within an imaging plane which is different from a focal plane, and wherein the processing of the received signals compensates for the phase variations including for the overlap portions of the added together images at the imaging plane.