Optical device, a system and a method for forming a distribution of a three-dimensional light field

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 of unit cells and a second subset of unit cells, wherein the first subset and the second subset are disjoint, and wherein the unit cells in a subset of unit cells are configured to be jointly switched from being inactive unit cells to being active unit cells,
• wherein the active unit cells 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 for switching the optical property of unit cells while maintaining the addressed inactive unit cells inactive.