Patent ID: 8559085
Filing Date: 2013-10-15
Classification: G02F

Abstract:
1. Focusing system for focusing an electromagnetic beam for three-dimensional random access applications, the system comprising a first pair ( 10 ) of acousto-optic deflectors ( 12 , 12 ′) for focusing an electromagnetic beam in an X-Z plane, and a second pair ( 20 ) of acousto-optic deflectors ( 22 , 22 ′) for focusing an electromagnetic beam in a Y-Z plane being substantially perpendicular to the X-Z plane, characterised in that the second pair ( 20 ) of acousto-optic deflectors ( 22 , 22 ′) is arranged between the acousto-optic deflectors ( 12 , 12 ′) of the first pair ( 10 ) of acousto-optic deflectors, such that the acousto-optic deflectors together form an array of deflectors with acousto-optic deflectors ( 12 , 12 ′) of the first pair ( 10 ) being the first and fourth acousto-optic deflectors in the array and acousto-optic deflectors ( 22 , 22 ′) of the second pair ( 20 ) being the second and third acousto-optic deflectors in the array.