USA As Represented by Secretary of the Navy

Robert E Miklos

Jasbinder Singh Sanghera

Ishwar Dayal Aggarwal

Guillermo R Villalobos

Shyam S Bayya

Daniel Joseph Gibson

Pablo C Pureza

Leslie Brandon Shaw

Woohong Kim

Colin C Baker

Kenneth J Ewing

Frederic Hau Kung

Bryan Sadowski

Alex E Moser

Michael Hunt

A transparent composite armor is made of tens to hundreds or even thousands of thin layers of material each with a thickness of 10-500 &#x3bc;m. An appropriate amount of impedance mismatch between the layers causes some reflection at each interface but limit the amplitude of the resulting tensile wave below the tensile strength of the constituent materials. The result is an improvement in ballistic performance and that will result is a significant impact in reducing size, weight, and volume of the armor.

Shockwave controlled ballistic protection

Sampling of a broad range of chemicals using a handheld sampler body, having a sample screen in a sampling cassette; where a sample screen housing further consists of a locking arm arrestor body, where, the locking arm arrestor body including a draw tube, and where the sampling screen can be positioned in either a retracted or extended positioned regarding a sample access face. When activated, the system executes collecting and sampling operations of chemicals, by exposing the extended sampling screen to a sampling environment, drawing through the draw tube, air from the sampling environment, further collecting, onto the surface of the sample screen solid particles and/or pressing the sample screen against the surface(s) of object in the sampling environment. Then, removing the sampling screen from the sampling environment and isolating the plurality of airborne chemical contaminants, by retracting a sample screen into the sample screen housing.

System apparatus and method of sampling a broad range of chemicals (SBRC) by collection and analysis of chemical vapors aerosols particulates and liquid droplets on surfaces

Disclosed herein is a method for making transparent ceramic spinel windows, domes and other complex shapes via edge bonding.

Spinel ceramics via edge bonding

A method and apparatus for making a substantially void-free preform for a microstructured optical fiber using a one-step process is provided. A preform is prepared from specialty glasses using a direct extrusion method. A die for use with the direct extrusion method is also provided, and a method for drawing the preform into a HC-PBG fiber for use in transmitting infra-red wavelength light is also provided. The preform comprises an outer jacket made of solid glass, a cladding having a plurality of air holes arranged in a desired pattern within the jacket, and a core which is hollow.

Direct extrusion method for the fabrication of photonic band gap (PBG) fibers and fiber preforms

Core/clad glass optical fiber preforms free of bubbles and soot at the coclad interface are fabricated by inserting a glass core rod into a cladding glass tube sized so that space remains between them, sealing the top and bottom of the tube onto the core rod to form a sealed space between them which is relatively soot free and under a vacuum and then hot isostatically pressing the sealed composite to collapse the tube onto the rod and also collapse bubbles in the glass. Soot formation is avoided or minimized by purging the space with inert gas while the bottom of the tube is collapsed onto the rod and by sealing the top under a dynamic vacuum and at the lowest possible temperature to avoid soot formation without cracking the glass. The space is vacuum outgassed before the second seal is made. Chalcogenide fiber drawn from a preform made in this fashion exhibits very low transmission losses.

Method for producing core/clad glass optical fiber preforms using hot

Growing community of inventors

La Plata, MD, United States of America

Robert E Miklos