A magnetometer is provided for detecting a magnetic field of strength B using the Faraday effect. The magnetometer includes a photon emitter, a first polarizer, a prism, a second polarizer, a detector and an analyzer. The emitter projects an emitted light beam substantially parallel to the magnetic field and having wavelength _. The prism has an interface surface and is composed of a Faraday medium having Verdet value V.
A coaxial mirror is provided for reflecting an electromagnetic signal. The mirror includes an outer pipe, an inner pipe, and first and second rods. The outer pipe extends between input and output ports, with closed initial and final terminals disposed at their respective ports. The inner pipe extends between a closed fore end and an open aft end. The inner pipe is coaxially disposed between the initial and final terminals within the outer pipe. The first rod, coaxially disposed within the outer pipe, extends from the input port to the fore end.
A spherical infrared robotic vehicle (SIRV) is provided for remote reconnaissance. The SIRV includes a spherical shell, a chassis within the shell, an infrared sensor within the chassis and a set of wheels between the shell and chassis. The spherical shell has inner and outer surfaces. The chassis contains a platform, an electric motor and a power supply, and includes an infrared aperture. The infrared sensor mounts to the platform and disposed to receive an infrared signal through the aperture as infrared images.
A process of electroless plating a tin or tin-alloy active material onto a metal substrate for the negative electrode of a rechargeable lithium battery comprising steps of (1) immersing the metal substrate in an aqueous plating solution containing metal ions to be plated, (2) plating tin or tin-alloy active material onto the metal substrate by contacting the metal substrate with a reducing metal by swiping one on the other, and (3) removing the plated metal substrate from the plating bath and rinsing with deionized water.
An electrical make-break connection for an apparatus having a recoiling portion and a non-recoiling portion may include a non-recoiling assembly fixed to the non-recoiling portion and a recoiling assembly fixed to the recoiling portion. Each of the non-recoiling and recoiling assemblies may include a mounting bracket and an electrical contact assembly disposed in the mounting bracket. Each contact assembly may include one or more electrical conductors. The non-recoiling contact assembly may float in its mounting bracket.
A wide aperture permanent magnet structure which is useful in creating a highly uniform longitudinal or solenoidal magnetic field in the working region of the magnet and in which the aperture of the structure can be equal in cross-sectional area to the working region of the magnet.
An apparatus, for measuring an applied electrical field and for reducing perturbation to the electrical field being measured, includes a laser integrated into an electro optic crystal sensor head prior to the output fiber. A probe beam is passed along the crystal direction of low birefringence of nearly circular optical indicatrix, rather than one of high EO modulation. The EO crystal is placed between two crossed polarizers and oriented such that a small tilt angle is subtended between its optic axis and the path of the probe beam.
A photocapacitor device is provided for responding to a photon having at least a specified energy. The photocapacitive device includes a first portion composed of a photocapacitive material; a second portion composed of a non-photocapacitive material; and a depletion region disposed between the first and second portions. The ph otocapacitive and non-photocapacitive materials respectively have first and second Fermi-energy differences, with the second Fermi-energy difference being higher than the first Fermi-energy difference.
The Naval Research Laboratory has patented and developed a number of inventions that enable freezedrying and rehydration of red blood cells and platelets. The suite also includes a synthetic red blood cell technology. These technologies enable long term storage and lightweight transport of critical blood products.