Abstract: This disclosure is directed to a method and apparatus for generating marker and comb indicia in an optical environment using a Mach-Zehnder (M-Z) modulator. High speed recording devices are configured to record image or other data defining a high speed event. To calibrate and establish time reference, the markers or combs are indicia which serve as timing pulses (markers) or a constant-frequency train of optical pulses (comb) to be imaged on a streak camera for accurate time based calibration and time reference. The system includes a camera, an optic signal generator which provides an optic signal to an M-Z modulator and biasing and modulation signal generators configured to provide input to the M-Z modulator. An optical reference signal is provided to the M-Z modulator. The M-Z modulator modulates the reference signal to a higher frequency optical signal which is output through a fiber coupled link to the streak camera.
Abstract: A probe including a fisheye lens is disclosed to measure the velocity distribution of a moving surface along many lines of sight. Laser light, directed to the surface and then reflected back from the surface, is Doppler shifted by the moving surface, collected into fisheye lens, and then directed to detection equipment through optic fibers. The received light is mixed with reference laser light and using photonic Doppler velocimetry, a continuous time record of the surface movement is obtained. An array of single-mode optical fibers provides an optic signal to an index-matching lens and eventually to a fisheye lens. The fiber array flat polished and coupled to the index-matching lens using index-matching gel. Numerous fibers in a fiber array project numerous rays through the fisheye lens which in turn project many measurement points at numerous different locations to establish surface coverage over a hemispherical shape with very little crosstalk.
Type:
Application
Filed:
November 1, 2012
Publication date:
May 1, 2014
Applicant:
National Security Technologies, LLC.
Inventors:
Brent Copely Frogget, Vincent Todd Romero
Abstract: A probe including a fisheye lens is disclosed to measure the velocity distribution of a moving surface along many lines of sight. Laser light, directed to the surface and then reflected back from the surface, is Doppler shifted by the moving surface, collected into fisheye lens, and then directed to detection equipment through optic fibers. The received light is mixed with reference laser light and using photonic Doppler velocimetry, a continuous time record of the surface movement is obtained. An array of single-mode optical fibers provides an optic signal to an index-matching lens and eventually to a fisheye lens. The fiber array flat polished and coupled to the index-matching lens using index-matching gel. Numerous fibers in a fiber array project numerous rays through the fisheye lens which in turn project many measurement points at numerous different locations to establish surface coverage over a hemispherical shape with very little crosstalk.
Type:
Grant
Filed:
November 1, 2012
Date of Patent:
April 29, 2014
Assignee:
National Security Technologies, LLC
Inventors:
Brent Copely Frogget, Vincent Todd Romero
Abstract: A gimbal is disclosed having a base with a bottom and a support structure extending up from the bottom. Two or more mounts connected to the base and a stiffener connects to two or more mounts. A slit diaphragm flexure connects to the stiffener around at least an outer circumference of the slit diaphragm flexure and one or more adjustors are provided to move the flexure. The stiffener may be two separate elements which releasably connect and secure the outer area of the flexure there between. The adjustors are configured to move upward or downward and contact the slit diaphragm flexure to thereby move the slit diaphragm flexure in response to movement of the adjustor. The flexure includes two or more slits that allow movement of a center area relative to an outer ring. The slit includes relieved areas that provide stress relief and increase orthogonal of movement.
Abstract: A dense plasma focus device is disclosed as having an anode with a non-constant radius and a cathode coupled to the anode, the cathode also having a non-constant radius. The anode and/or the cathode may be tapered. In addition, a ratio of the non-constant radius of the anode and the non-constant radius of the cathode may be held constant along the length of the dense plasma focus device in order to maintain constant inductance. Alternatively, the inductance may be varied by varying the ratio of the anode and cathode radii along the length of the dense plasma focus device.
Type:
Grant
Filed:
May 29, 2009
Date of Patent:
July 16, 2013
Assignee:
National Security Technologies, LLC
Inventors:
Edward Christopher Hagen, Bernard Timothy Meehan, III
Abstract: The present invention includes an interferometer for VISAR. Optionally, the present VISAR system includes intracavity imaging design with converging beams and field elements to, among other possible purposes, image the array. An optional embodiment of the present VISAR system may also optionally include precision fiber arrays. Optionally, the present system may use non-collimated beams to allow intracavity access to individual channels for one or more additional delay paths.
Type:
Grant
Filed:
November 30, 2005
Date of Patent:
November 13, 2007
Assignee:
National Security Technologies, LLC
Inventors:
Bruce Russell Marshall, Marcus David Knudson, Elliot Michael Burke, Terrence John Davies, Gerald Daniel Stevens
Abstract: A method and device for restoration of electro-optical image data using an adaptive Wiener filter begins with constructing imaging system Optical Transfer Function, and the Fourier Transformations of the noise and the image. A spatial representation of the imaged object is restored by spatial convolution of the image using a Wiener restoration kernel.