Diagonal Hologram Interlacing to Separate Diffraction Orders

The patent applies diagonal offset interlacing that shifts alternating hologram lines in the diagonal direction (both horizontal and vertical dimensions) rather than conventional single-dimensional offset. This two-dimensional diagonal shifting separates the primary image from higher diffraction orders in the diagonal direction, preventing overlap while expanding the field of view, thereby resolving the contradiction between field of view expansion and picture quality maintenance

The patent segments the hologram into alternating lines that are offset diagonally relative to each other. By dividing the hologram content into interleaved lines with diagonal displacement, the system separates the optical paths of different diffraction orders, preventing ghost image formation while maintaining expanded field of view, thus resolving the quality-field of view contradiction

The patent introduces diagonal offset in both horizontal and vertical dimensions to separate diffraction orders. This two-dimensional diagonal shifting moves higher diffraction orders away from the primary image path in the diagonal direction, eliminating ghost images while preserving etendue expansion capabilities, thus resolving the contradiction between adaptability and harmful factors

The patent converts the potentially harmful effect of higher diffraction orders (which cause ghost images) into a beneficial separation mechanism. By deliberately offsetting alternating hologram lines diagonally, the higher diffraction orders are redirected away from the primary image, transforming what would be harmful overlap into useful spatial separation, thereby resolving the ghost image problem while maintaining etendue expansion