Patent ID: 8643924

Claim:
A two-dimensional optical scanner comprising: a first acousto-optical deflector that deflects incident light according to a control signal from outside; a first driving unit that rotates the first acousto-optical deflector around a rotational axis perpendicular to a first plane including the incident light on the first acousto-optical deflector and emission light from the first acousto-optical deflector; a first prism that is arranged adjacent to an emission end of the first acousto-optical deflector and compensates angular dispersion of the emission light from the first acousto-optical deflector; a second acousto-optical deflector that deflects incident light according to a control signal from outside; a second driving unit that rotates the second acousto-optical deflector around a rotational axis perpendicular to a second plane including the incident light on the second acousto-optical deflector and emission light from the second acousto-optical deflector; a second prism that is arranged adjacent to an emission end of the second acousto-optical deflector and compensates angular dispersion of the emission light from the second acousto-optical deflector; and a relay lens that allows the emission end of the first acousto-optical deflector and an incident end of the second acousto-optical deflector to be optically conjugate with each other, wherein the first acousto-optical deflector and the second acousto-optical deflector are arranged such that the first plane and the second plane are perpendicular to each other.