 Heat-stabilized vinyl chloride polymers |
| OF THE INVENTION More particularly, a major object of this invention is the provision of PVC ... |
|
| Thermoplastic molding materials based on polyphenylene ethers, nylons and styrene copolymers |
| We claim: 1. A thermoplastic molding material comprising: (A) not less than 5% by weight of ... |
|
| Heat shrinkable polyvinyl chloride film with methyl methacrylate polymer additive |
| OF THE PREFERRED EMBODIMENTS When a uniaxially heat shrinkable film is prepared, the film ... |
|
| Inner seal for capped containers |
| Referring to the drawings in greater detail, composite sheet material 10 comprises inner seal 11, ... |
|
| Vinyl polymer composition and process for making same |
| The rigid vinyl polymer composition of the present invention incorporates therein, as a processing ... |
|
| Biaxially oriented polypropylene film for metallizing applications |
| OF THE PREFERRED EMBODIMENTS The ethylene content and the distribution factor of the copolymer are ... |
|
| Method of severing a semiconductor device |
| What we claim is: 1. A method of cutting a semiconductor device of the type comprising: a substrate ... |
|
| Temperature sensitive electrical element, and method and material for making the same |
| Referring to the drawing, a temperature sensitive electrical element 10, embodying the invention, ... |
|
| Electrical resistor and method of making the same |
| What is claimed as new and desired to be secured by Letters Patent of the United States is: 1. A ... |
|
| Ceramic-glass-metal composite |
| We claim: 1. A ceramic-glass metal composite, comprising: from about 5 to about 45 volume % of ... |
|
|
Method of imaging through a scattering medium using coherent light
| Details |
Inventors: Feinberg, Jack L.; Rebane, Alexander;
Assignee: University of Southern California (Los Angeles, CA)
Primary Examiner: Ben; Loha
Assistant Examiner: Juba, Jr.; John
Attorney, Agent or Firm: Benman Collins & Sawyer
In a conventional hologram, a photographic film records the interference pattern of monochromatic light, scattered from an object (20) to be imaged, with a reference beam of unscattered light. Illumination of the developed film with a replica of the reference beam then creates a virtual image of the original object. Molecular resonance may be used to record an interference pattern between light signals that arrive at different times, and with this technique create a hologram (10') with time resolution. Using a time reference pulse (16) as a "light shutter", holographic images may be recorded selectively, according to the time taken by light travelling from the object to the hologram. This method may be used to image an object obscured by a light-scattering medium. |
|
DETAILED DESCRIPTION What is claimed is: 1.
A method of recording an image of an object obscured by a light-scattering medium, comprising storing said image in a spectral hole-burning material by: (a) providing a spatially coherent source of light of sufficiently broad spectral content to illuminate said spectral hole-burning material, said source of light generating a source beam, (b) splitting said source beam into two portions, a reference beam and an object beam, (c) directing said reference beam onto said spectral hole-burning material, (d) directing said object beam onto said light-scattering medium to generate an image-bearing beam which is by predetermined choice either transmitted through said light-scattering medium or reflected thereby, said image-bearing beam comprising an image portion and an extraneous portion, (e) delaying one of said beams relative to the other of said beams for a period of time greater than the coherence time of said beams and less than the phase-decay time of said spectral hole burning material so that said reference beam arrives on said spectral hole-burning material at a time in between the arrival of said image portion and said extraneous portion of said image-bearing beam, and (f) directing said image-bearing beam onto said spectral hole-burning material in a manner so as to interact with said reference beam within a predetermined time related to 1/.
DELTA.
.
omega.
for a time sufficient to alter said hole-burning material to cause the appearance of a plurality of narrow spectral holes, having a width .
DELTA.
.
omega.
, in its absorption spectrum to thereby expose said hole-burning material and store said image therein.
2.
The method of claim 1 wherein the relative path length of said reference beam and said image beam is adjustable.
3.
The method of claim 1 wherein said object is embedded in said light-scattering medium.
4.
The method of claim 1 wherein said object is in front of or behind said light-scattering medium.
5.
The method of claim 1 wherein said image portion of said image-bearing beam arrives on said hole-burning material prior to said reference beam
|
| Related patents |
|
|
Material having antireflection, hydrophobic and abrasion resistance properties and process for depositing an antireflection, hydrophobic and abrasion resistant coating on a substrate
Consequently the object of the invention is to obviate these disadvantages and bring about the deposition of an abrasion-resistant, antireflection coating on a non-...
|
|
|
Light absorptive antireflector
What is claimed is: 1. A light absorptive antireflector consisting essentially of a substrate, a light absorbing film formed on the substrate and a silica film formed on ...
|
|
|
Polarizer plate with anti-stain layer
Generally speaking, in accordance with the invention, a polarizer plate is provided in which an anti-staining layer including a fluorine-containing silane compound is ...
|
|
|
Heat-resistant structural body, halogen-based corrosive gas-resistant material and halogen-based corrosive gas-resistant structural body
What is claimed is: 1. A halogen-based corrosive gas-resistant structural body comprising a substrate containing at least metallic aluminum, a nitrided material formed ...
|
|
|
Laminated transparent assembly with edge sealing means
According to the present invention, laminated transparencies are provided with improved edge seal systems that comprise a barrier layer composed of an organic ...
|
|
|
Reflector
OF INVENTION The present invention relates to a reflector suitable for use in illumination such as an illumination shade, various optical instruments, the sunlight ...
|
|
|
Fluoride ion as a curing catalyst for silicon-containing resins
OF THE INVENTION A composition of the invention contains (A) a silicon-containing resin having in one molecule at least one silicon atom connected to a hydrolyzable ...
|
|
|
Sucrose fatty acid ester compositions and shortenings and margarines made therefrom
OF THE INVENTION It has now been discovered that it is possible to increase the rate at which certain intermediate melting sucrose fatty acid esters crystallize from a ...
|
|
|
Method for lining a pipe or main
OF THE PRESENTLY PREFERRED EMBODIMENTS Referring to FIG. 1, a rig 1 comprises a heater tube 2 which in use is supported above ground on a support frame 3 (see also FIGS....
|
|
|
Method for grounding pole structures in thin film magnetic heads
In the present invention, the above-described problems due to stray capacitance and noise sensitivity are reduced by electrically grounding the pole pieces or core ...
|
|
|
Manufacturing Materials 
