Lens array: Difference between revisions
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'''Lenticular arrays:''' Arrays of cylindrical microlenses (lenticules) arranged one-dimensionally or two-dimensionally. These produce multiple horizontal viewing zones in glasses-free 3D displays. For example, a lenticular lens array can restrict the exit pupil to certain angles, enabling light-field panels that show different images to each eye.<ref name="Balogh2023"></ref> Such arrays are widely used in glasses-free 3D signage and have been adapted to VR/AR light-field display prototypes. | '''Lenticular arrays:''' Arrays of cylindrical microlenses (lenticules) arranged one-dimensionally or two-dimensionally. These produce multiple horizontal viewing zones in glasses-free 3D displays. For example, a lenticular lens array can restrict the exit pupil to certain angles, enabling light-field panels that show different images to each eye.<ref name="Balogh2023"></ref> Such arrays are widely used in glasses-free 3D signage and have been adapted to VR/AR light-field display prototypes. | ||
'''Holographic optical element (HOE) arrays:''' These use diffractive hologram patterns that act like an array of lenses. In AR waveguide combiners, ''lens-array holographic optical elements'' have been used to form 2D/3D transparent display screens.<ref name="Liu2012"> | '''Holographic optical element (HOE) arrays:''' These use diffractive hologram patterns that act like an array of lenses. In AR waveguide combiners, ''lens-array holographic optical elements'' have been used to form 2D/3D transparent display screens.<ref name="Liu2012"></ref> A HOE can replace a physical lens array by encoding lens behavior into a recorded interference pattern. In one prototype, a ''lens-array HOE'' was created to build a see-through AR screen.<ref name="Liu2012" /> Other works use holographic micromirror arrays in conjunction with MLAs to couple images into waveguides.<ref name="Jang2021" /> | ||
'''Liquid crystal / tunable lens arrays:''' Some arrays use liquid crystal (LC) or fluidic lenses whose optical power can be electronically changed. For example, a chiral (polarization-sensitive) LC lens array was demonstrated in an AR system to steer light and break conventional FOV limits.<ref name="Wei2023" /> Variable-focus MLAs can allow dynamic focus adjustment or multi-focal displays. | '''Liquid crystal / tunable lens arrays:''' Some arrays use liquid crystal (LC) or fluidic lenses whose optical power can be electronically changed. For example, a chiral (polarization-sensitive) LC lens array was demonstrated in an AR system to steer light and break conventional FOV limits.<ref name="Wei2023" /> Variable-focus MLAs can allow dynamic focus adjustment or multi-focal displays. |