Patent ID: 7982879

Claim:
An apparatus comprising: a first arrangement configured to receive at least one first electro-magnetic radiation, and forward at least one second electro-magnetic radiation within a solid angle to a sample, wherein the at least one second electro-magnetic radiation is associated with the at least one first electro-magnetic radiation, wherein the first arrangement is configured to receive a plurality of third electro-magnetic radiations from the sample which is associated with the at least one second electro-magnetic radiation, and wherein at least one portion of the third electro-magnetic radiations is provided outside a periphery of the solid angle; and a second arrangement configured to simultaneously detect signals which are (i) provided along optical axes associated therewith that are different from one another, and (ii) associated with each of the third electro-magnetic radiations, wherein the signals are associated with information for the at least one sample at a plurality of depths thereof, and wherein the second arrangement is configured to determine the depths using the at least one portion of the third electro-magnetic radiations.