Electrically controllable microlens array fabricated by anisotropic phase separation from liquid-crystal and polymer composite materials.

@article{Ji2003ElectricallyCM,
  title={Electrically controllable microlens array fabricated by anisotropic phase separation from liquid-crystal and polymer composite materials.},
  author={Hee-Su Ji and Jae-Hoon Kim and Satyendra Kumar},
  journal={Optics letters},
  year={2003},
  volume={28 13},
  pages={
          1147-9
        }
}
Anisotropic phase separation has been used to fabricate an electrically switchable microlens array from nematic liquid crystals. Nematic liquid-crystal-based microlens arrays have been built with diameters of approximately 400 microm and natural focal lengths as small as 1.6 mm. The focal length of each microlens in the array can be changed in milliseconds by an applied electric field. These devices, which have no internal substructures to scatter light, offer higher efficiency and greater… 
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References

SHOWING 1-10 OF 17 REFERENCES
Effects of low polymer content in a liquid-crystal microlens.
TLDR
A small number of bifunctional monomers are mixed with a nematic liquid crystal (LC) and cured with a distributed electric field, which is produced by a circular-hole-patterned electrode structure, and a polymer-stabilized LC microlens is demonstrated.
Phase-separated composite films for liquid crystal displays
TLDR
This method makes it possible to prepare devices with liquid crystal film thickness comparable to optical wavelengths, and exhibits electro-optical properties not observed in devices prepared by conventional methods, polymer dispersion, or polymer-stabilization methods.
A liquid crystal microlens obtained with a non-uniform electric field
Abstract A homogeneously aligned nematic liquid crystal cell with a hole-patterned electrode and with an indium-tin oxide (ITO-) coated counter-electrode has been prepared. A non-uniform electric…
Laser-fabricated glass microlens arrays.
TLDR
Tuning the laser heat-source properties was found to give precise control over the melt process and the resulting lenslet geometries, resulting in large, laser-formed refractive microlens arrays on doped borosilicate glass.
Multilevel diffractive microlens fabrication by one-step laser-assisted chemical etching upon high-energy-beam sensitive glass.
TLDR
The one-step nonphotolithographic fabrication technique has been successfully applied for the realization of an eight-phase-level diffractive microlens fabrication upon high-energy-beam sensitive glass.
Kinetic theory of phase separation induced by nonuniform photopolymerization
A kinetic model is developed to study the process of phase separation that occurs when a polymer‐dispersed liquid‐crystal diffraction grating is produced by a process of photopolymerization. We find…
Active-fiber star coupler that uses arrays of microlenses and liquid-crystal modulators.
TLDR
An active-fiber star coupler that uses arrays of N x N microlenses and liquid-crystal modulators and is capable of wavelength selection at individual output fibers is proposed for wavelength division multiplexing applications.
Kinetics of anisotropic photopolymerization in polymer matrix
Microlens arrays produced by a photolytic technique.
Spherical microlens arrays are produced directly from glass by a photothermal process. The method, performance of lenses, and applications are discussed.
Phys. Rev. E
  • Phys. Rev. E
  • 2000
...
1
2
...