Volumetric 3-D displays proposed and demonstrated in the past have been low in resolution and refresh rate, but not in cost. This paper describes the development of an electro-optic multiplanar volumetric 3-D display (without moving parts) based on unique liquid crystal (LC) switchable light diffusion panels. These LC switchable diffuser panels are produced by our proprietary holographic Light Shaping Diffuser fabrication process. Using a stack of closely spaced LC switchable diffusers, which have shown excellent switching speed, diffusion efficiency, and clarity, a multiplanar volumetric 3- D display was demonstrated, projecting full-color 2-D images from a high speed spatial light modulator.
This paper describes the development of a non-contact diagnosis system for analyzing the plasma density profile, temperature profile, and ionic species of a high energy laser-generated plasma. The system was developed by Physical Optics Corporation in cooperation with the U.S. Army Space and Missile Defense Command, High Energy Laser Systems Test Facility at White Sands Missile Range, New Mexico. The non- contact diagnostic system consists of three subsystems: an optical fiber-based interferometer, a plasma spectrometer, and a genetic algorithm-based fringe-image processor. In the interferometer subsystem, the transmitter and the receiver are each packaged as a compact module. A narrow notch filter rejects strong plasma light, passing only the laser probing beam, which carries the plasma density information. The plasma spectrum signal is collected by an optical fiber head, which is connected to a compact spectrometer. Real- time genetic algorithm-based data processing/display permits instantaneous analysis of the plasma characteristics. The research effort included design and fabrication of a vacuum chamber, and high-energy laser plasma generation. Compactness, real-time operation, and ease of use make the laser plasma diagnosis system well suited for dual use applications such as diagnosis of electric arc and other industrial plasmas.
A mutually pumped phase conjugator generates a phase- conjugate replica for each of two mutually incoherent incident optical beams interacting within a photorefractive crystal. This operation is useful for optical communication and interferometry. In this paper, we report a demonstration of mutual phase conjugation for light reflected from a diffuse surface. We studied the dependence of the phase- conjugation reflectivity on the parameters of the optical system. Finally, we built a mutually phase conjugating interferometer to detect the ultrasound vibration of a diffuse object to inspect defects inside it, based on laser generated ultrasound technology. The experimental results and analysis will be given.
This paper investigates the spatial polarization characteristics of real-time holography and two- wave mixing in eosin both in theory and experiment, and we utilize these features to realize optical storage and pattern recognition.
This paper deals with two-wave mixing in eosin doped gelatin film. Some chemical and physical properties of eosin are shown. The basic two-wave mixing equation and real-time holographic characteristics are discussed. The higher order diffraction is observed. The experimental results also are given.
Dynamic global interconnections between processors in massively parallel computers are a highly desirable feature. Such as photorefractive materials can be used to store holographic gratings that implement interconnection links between individual processing elements of two distinct planes. In this paper we detail the energy transfer between two coupled beams writing holograms in EOSIN film. A type of holographic routing architecture which uses a LCLV is presented. Spatial polarization characteristics and temporal modulation coupling are investigated.
We have studied that the dynamic behavior of our national products Bi12SiO20, Fe:KNbO3, etc., for real-time holographic recording and display. The potential applications of these crystals to image storage and freezing, real-time interferometry, and optical switching are described. The results of experiments are also given.
In this paper, we developed and demonstrated a liquid crystal light valve and photorefractive spatial light modulators, utilizing these devices to build up a real-time correlation pattern recognition system. The performance parameters of these devices were measured, and some of the experimental results are given.
This paper describes photorefractive self-pump phase conjugation in BaTiO3and multi-wave
mixing in Bi12SiO20 spatial light modulators, and furtherly utilizes these systems to impletment optical
image storage, wavelength conversion, image subtraction and optical image shifting. The
operational principle and experimental results are also presented.
The applications and development of hybrid image processing have attracted significant attention in recent. This paper describes a multifunction optoelectronic hybrid processor that can inplemente several operations . This new system is appropriate for real-time automatic pattern recognition. An effective approach and architecture are provided for the robotic vision. In the system utilizing the joint transform techniques and the resulting Fourier transform of the object image and reference image was detected by the CCD camera and then sent it into digital image preprocessor . At the same time Fourier spectrum of the edge-enhanced images are obtained pass coherent optical image processing through a liquid crystal spatial light modulator as a real-time interface device ( a incoherent-to-coherent irrge flCC ) . Thus classification and correlation of the object pattern are carried out by using both of digital and analogy inge processing. The preliminary experimental results are given. 1 .