An optical device for forming a distribution of a three-dimensional light field, said optical device comprising: an array of unit cells, wherein a unit cell in the array of unit cells is individually addressable for controlling an optical property of the unit cell, wherein addressing of the unit cell is configured to switch the optical property of the unit cell between a first condition of the optical property and a second condition of the optical property; wherein the unit cells in the array of unit cells are configured to be selectively active or inactive and wherein the array of unit cells comprise at least a first subset (110; 112; 114; 116) of unit cells and a second subset (110; 112; 114; 116) of unit cells, wherein the first subset (110; 112; 114; 116) and the second subset (110; 112; 114; 116) are disjoint, and wherein the unit cells in each of the first and second subset (110; 112; 114; 116) of unit cells are configured to be jointly switched from being inactive to being active, wherein the optical device is configured to select the unit cells in one of the first and the second subsets to be active and the unit cells in the other of the first and the second subsets to be inactive, wherein only the active unit cells, in the one of the first and the second subsets, are configured to interact with an incident light beam and cooperate in forming the distribution of the three-dimensional light field; and wherein the optical device is configured to address inactive unit cells in the other of the first and the second subsets by switching the optical property of unit cells, when the unit cells in the other of the first and the second subsets are inactive and while the unit cells in the one of the first and the second subsets are active; characterized in that the optical device further comprises a light shutter structure arranged in relation to the array of unit cells, wherein the light shutter structure is controllable for selecting whether incident light on the light shutter structure reaches the unit cells in the array of unit cells with which the light shutter structure is associated for selecting whether the unit cells in the array are being inactive or being active. an array of unit cells, wherein a unit cell in the array of unit cells is individually addressable for controlling an optical property of the unit cell, wherein addressing of the unit cell is configured to switch the optical property of the unit cell between a first condition of the optical property and a second condition of the optical property; wherein the unit cells in the array of unit cells are configured to be selectively active or inactive and wherein the array of unit cells comprise at least a first subset (110; 112; 114; 116) of unit cells and a second subset (110; 112; 114; 116) of unit cells, wherein the first subset (110; 112; 114; 116) and the second subset (110; 112; 114; 116) are disjoint, and wherein the unit cells in each of the first and second subset (110; 112; 114; 116) of unit cells are configured to be jointly switched from being inactive to being active, wherein the optical device is configured to select the unit cells in one of the first and the second subsets to be active and the unit cells in the other of the first and the second subsets to be inactive, wherein only the active unit cells, in the one of the first and the second subsets, are configured to interact with an incident light beam and cooperate in forming the distribution of the three-dimensional light field; and wherein the optical device is configured to address inactive unit cells in the other of the first and the second subsets by switching the optical property of unit cells, when the unit cells in the other of the first and the second subsets are inactive and while the unit cells in the one of the first and the second subsets are active; characterized in that the optical device further comprises a light shutter structure arranged in relation to the array of unit cells, wherein the light shutter structure is controllable for selecting whether incident light on the light shutter structure reaches the unit cells in the array of unit cells with which the light shutter structure is associated for selecting whether the unit cells in the array are being inactive or being active.