Method and apparatus for generating hologram

An apparatus for generating a hologram, the apparatus comprising:

• a controller comprising a first processor and a second processor that are configured to generate a hologram signal from three-dimensional (3D) image data,
• wherein the first processor is configured to divide the 3D image data into data groups which are independent from one another and calculate, from at least one of the data groups, hologram values to be displayed at respective positions on a hologram plane, the hologram values indicating values regarding an interference pattern by interference between an object wave and a reference wave, at the respective positions on the hologram plane, by object points in the at least one of the data groups,
• the second processor is configured to calculate, from at least another one of the data groups, hologram values to be displayed at the respective positions on the hologram plane, in parallel with the first processor, the hologram values indicating values regarding an interference pattern by interference between an object wave and a reference wave, at the respective positions on the hologram plane, by object points in at least another one of the data groups,
• at least one of the first processor and the second processor is further configured to sum the hologram values calculated by the first processor and the second processor, for each of the respective positions on the hologram plane,
• the first processor is further configured to convert the summed hologram values to data for a spatial light modulator,
• the first processor is further configured to divide the 3D image data into the data groups based on primary color components of a color model set for the first processor,
• the first processor is further configured to divide each of the data groups into a plurality of depth images based on depth information obtained from the hologram plane, and
• the first processor is further configured to, with respect to each of plane images of the 3D data image defined by the primary color components and the depth information, calculate a diffraction limit, divide each of the plane images into a plurality of divided images, each of the plurality of divided image having a size equal to the diffraction limit multiplied by the diffraction limit, and form a plurality of sub-images by gathering image data at a same matrix position from each of the plurality of divided images.

A three-dimensional (3D) holographic image display apparatus comprising:

• a light source;
• a hologram generating apparatus comprising:
• a controller comprising a first processor and a second processor that are configured to generate a hologram signal from three-dimensional (3D) image data,
• wherein the first processor is configured to divide the 3D image data into data groups which are independent from one another and calculate, from at least one of the data groups, hologram values to be displayed at respective positions on a hologram plane, the hologram values indicating values regarding an interference pattern by interference between an object wave and a reference wave, at the respective positions on the hologram plane, by object points in the at least one of the data groups,
• the second processor is configured to calculate, from at least another one of the data groups, hologram values to be displayed at the respective positions on the hologram plane, in parallel with the first processor, the hologram values indicating values regarding an interference pattern by interference between an object wave and a reference wave, at the respective positions on the hologram plane, by object points in at least another one of the data groups,
• at least one of the first processor and the second processor is further configured to sum the hologram values calculated by the first processor and the second processor, for each of the respective positions on the hologram plane,
• the first processor is further configured to convert the summed hologram values to data for a spatial light modulator,
• the first processor is further configured to divide the 3D image data into the data groups based on primary color components of a color model set for the first processor,
• the first processor is further configured to divide each of the data groups into a plurality of depth images based on depth information obtained from the hologram plane, and
• the first processor is further configured to, with respect to each of plane images of the 3D data image defined by the primary color components and the depth information, calculate a diffraction limit, divide each of the plane images into a plurality of divided images, each of the plurality of divided image having a size equal to the diffraction limit multiplied by the diffraction limit, and form a plurality of sub-images by gathering image data at a same matrix position from each of the plurality of divide images;
• and
• a spatial light modulator, to which the hologram signal formed in the hologram generating apparatus is applied and which modulates light from the light source according to the hologram signal.