A wireless handheld computer in a telephone handset form factor is being developed. The Communicator device contains a StrongArm SA-1110 microprocessor, and a high-resolution color microdisplay and a virtual image display system. The current optical system is based on a viewfinder style eyepiece. The system under development will have a flip out mirror, reducing the overall package size. The existing display is an analog 4-input 800 by 600 pixel device. The next generation display is an integrated digital display based on a sampled-ramp architecture. The processor interface uses a shadow frame buffer for efficient graphics memory access.
Diffraction characteristics of 0.5 micron period, liquid- crystal-filled diffraction gratings are presented. Theoretical predictions from rigorous coupled wave analysis, device fabrication techniques, and experimental device performance are detailed. These devices are shown to be useful for diffractive daylighting, high efficiency color liquid crystal displays and as elements in 3D video systems.
The optical transfer of a large-scale synthetic holographic master stereogram via Benton rainbow technique is discussed. The limits of this technique when the volume the rainbow hologram fills is increased to 8000 cubic meters are evaluated. Blur and accommodation present the primary difficulties. The choice of imagery plays a crucial role in minimizing these effects.
The first step in the construction of a very deep, large source size, white light illuminated hologram is discussed. We outline the steps taken thus far in the creation of our computer- generated master hologram slit. Our goal is to computer generate a 2 meter master slit for optical transfer via Benton rainbow holography technique. The transfer hologram will ultimately be re-illuminated by the moon and fill a space of approximately 8000 cubic meters. Discussion of the relative merits of synthetic stereographic methods and CGH methods is presented as well as several novel hybrid techniques. The CGH test prints thus far created are evaluated for several types of aberrations and methods of pre-distortion and distortion correction are proposed.
We present an electro-optical apparatus capable of displaying a computer generated hologram
(CGH) in real time. The CGH is calculated by a supercomputer, read from a fast frame buffer, and
transmitted to a high-bandwidth acousto-optic modulator (AOM). Coherent light is modulated by the
AOM and optically processed to produce a three-dimensional image with horizontal parallax.
Conference Committee Involvement (5)
Clinical and Translational Neurophotonics 2025
25 January 2025 | San Francisco, California, United States
Optical Architectures for Displays and Sensing in Augmented, Virtual, and Mixed Reality (AR, VR, MR) III
23 January 2022 | San Francisco, California, United States
Optical Architectures for Displays and Sensing in Augmented, Virtual, and Mixed Reality (AR, VR, MR) II
28 March 2021 | Online Only, California, United States
Optical Architectures for Displays and Sensing in Augmented, Virtual, and Mixed Reality (AR, VR, MR)
2 February 2020 | San Francisco, California, United States
Wave Optics and VLSI Photonic Devices for Information Processing
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