Hongyue Gao

  • Citations Per Year
Learn More
A video-rate optical holographic display is achieved by using an azo-dye-doped liquid crystal as the passive, updatable recording material. The response time of this material is measured in the order of several to tens of milliseconds, depending on recording beam intensities, polarization directions, and polarization states. A holographic video at a refresh(More)
We report multiple holographic recording and optical address recognition schemes in Methyl Red-doped liquid-crystal film without an applied electric field. Ten gratings are recorded at a single location of a 5 mm2 area by using optical multiplexing methods, and the diffraction efficiencies are studied for multiplexed gratings. Diffraction behavior of(More)
We study, both experimentally and theoretically, the dependence of the absorbance and the two-beam coupling diffraction efficiency of dye-doped liquid-crystal films on the angle between the director vector of the liquid-crystal molecules and the polarization direction of the recording beams, which is shifted continuously from parallel to antiparallel(More)
In a transmittance spectrum of air etalon composed of ITO-coated glass plates, stronger spectral modulation is observed by using a focused white-light incident beam compared with that by using a conventionally collimated beam. The light source is a single commercial light-emitting diode. An angular integrated multiple-beam Fabry-Perot model is proposed that(More)
We have addressed some errors in our recent work [Appl. Opt.56, 5668 (2017)APOPAI0003-693510.1364/AO.56.005668]. Especially, we note that the formulae for reconstruction of phase-only holograms are different from the formulae for amplitude holograms. So Eqs. (9) and (12) must be modified.
The fractional Fourier transform (FRT) has been used for computing holograms in holographic displays due to its continuity of describing wave diffraction in the near field and far field. In this study, we propose a method to realize a full-color holographic 3D display with combined use of the FRT and the free-space Fresnel diffraction. A slice-based optical(More)
Holographic images are recorded and the diffraction characteristic of the hologram is investigated in a planar Methyl Red-doped liquid crystal film without an external electric field. Multiple holograms are stored in this film with no external electric field, and peristrophic multiplexing, angular multiplexing, and spatial multiplexing are demonstrated to(More)
We live in a highly tactile world. However, our daily interactions with technology, from tablets to automobiles, are becoming more and more flat. The next wave of user interface will re-incorporate dynamic physical features with the introduction of a novel deformable membrane technology that integrates into standard touch displays and surfaces. A novel(More)
Digital hologram print based on computer generated 3D models is studied in new polymer thin films with high quality for holographic three-dimensional (3D) display, which has wide applications in large size, high definition true 3D display. OCIS codes: (090.2870) Holographic display; (090.5694) Real-time holography; (090.4220) Multiplex holography
  • 1