A hyperboloidal mirror can widen the spreading angle of an incident spherical wave by reflecting the spherical wave outside the hyperboloidal mirror. We propose using this geometrical reflection property to… Click to show full abstract
A hyperboloidal mirror can widen the spreading angle of an incident spherical wave by reflecting the spherical wave outside the hyperboloidal mirror. We propose using this geometrical reflection property to widen the viewing zone in computer-generated holography (CGH). A hyperboloidal mirror was placed after wavefront modulation by a hologram, and it reflected the wavefront radially with a wide spreading angle. Viewers can observe a 3D object as a virtual image anywhere around the hyperboloidal mirror. A hologram calculation algorithm that considers the hyperboloidal mirror reflection was theoretically derived. The optical experiment successfully demonstrated super-wide viewing zones of 360° and 75° in the azimuthal and elevation directions, respectively.
Journal Title: Optics letters
Year Published: 2025
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