34,35
-1
1500
30
Briefs: Photonics/Optics
A single-laser-based, heterodyne optoelectronic system that measures the displacements of two targets along the same lines of sight has been developed. Heretofore, it would have been necessary to...
Briefs: Photonics/Optics
A spatially modulated prism interferometer (SMPI) has been developed that overcomes the complexities of traditional interferometers and the inherent limitations of diffraction gratings, dispersion...
Briefs: Photonics/Optics
Several high-fidelity imaging spectrometers have been designed with convex diffraction gratings for wavelengths ranging from the ultraviolet to the thermal infrared. All the designs...
Briefs: Photonics/Optics
A method of determining sizes of particles suspended in liquids and engaging in Brownian motion involves statistical analysis of counts of photons of laser light scattered by the...
Briefs: Photonics/Optics
A stroboscopic scanning electron microscope (SEM) has been proposed as a means of generating still or slow-motion pictures of moving structures in microelectromechanical systems (MEMS). Such...
Briefs: Photonics/Optics
A proposed optoelectronic system based on imaging-lidar and differential-altimetry techniques would generate data equivalent to a height map of a surface area. Originally conceived for use in...
Briefs: Imaging
A new design for a complementary metal oxide/semiconductor (CMOS) snapshot imaging device of the photodiode-based, active-pixel-sensor (APS) type calls for features to prevent...
Briefs: Photonics/Optics
Miniature high-resolution optical-absorption sensors for detecting trace amounts of chemical species of interest in gas and liquid samples are undergoing development. The transducer in a...
Briefs: Photonics/Optics
A proposed optoelectronic apparatus would perform the combined functions of a confocal microscope and a Raman spectrometer. It would be used to acquire Raman-spectral-image and/or...
Briefs: Photonics/Optics
A method of coarse alignment has been proposed for a primary telescope mirror that comprises multiple segments mounted on actuators that can be used to tilt and translate the segments to effect...
Briefs: Photonics/Optics
Experiments have shown that a highly oblate microspheroid made of low-dielectric-loss silica glass can function as a high-performance optical resonator. The shape of this resonator (see...
Briefs: Photonics/Optics
Software for Generating Mosaics of Astronomical Images
Software is being developed to "stitch" together multiple astronomical images of small, adjacent patches of the sky into a single mosaic image of a large portion of the sky. These mosaics make data from large areas of the sky readily available for efficient viewing of many types of celestial...
Briefs: Photonics/Optics
Thin, initially transparent films made of variants of a polymeric cation-exchange material have been found to be useful for facilitating the luminescence detection and...
Briefs: Photonics/Optics
Infrared (IR) sensors of a proposed type, and integrated-circuit imaging devices containing planar arrays of such sensors, would be based on a combination of (1)...
Briefs: Photonics/Optics
A proposed complementary metal oxide/semiconductor (CMOS) integrated-circuit imaging device of the active-pixel sensor (APS) type is capable of simultaneously generating the pixel-by-pixel sum...
Briefs: Electronics & Computers
Software for Analyzing Telecommunication Link Performance
The Telecom Forecaster Predictor (TFP) is a multi-mission computer program for analyzing deep space telecommunication links. Analysts use the TFP for link planning, performance prediction, and post-pass trending analysis. For each mission, multiple users access a controlled set of TFP...
Briefs: Photonics/Optics
Integrated-circuit imaging devices of a proposed type would contain planar arrays of microscopic sensors that would exploit giant magnetoresistance (GMR). Each GMR sensor in such a device...
Briefs: Photonics/Optics
A method of processing phase measurements in a large, unequal-arm laser Michelson interferometer makes it possible to measure phase effects much smaller than the laser phase noise....
Briefs: Photonics/Optics
Improved Dynamic Holographic Optical-Interconnection System
An improved visual display system for a helmet produces two- and three-dimensional images by use of the limited domain of spatial light modulation (SLM) values. One especially notable improvement incorporated into the design of this system is a simplification in the design of dynamic...
Briefs: Photonics/Optics
Optoelectronic oscillators (OEOs) that incorporate carrier-suppression subsystems for reduction of close-to-carrier phase noise are undergoing development. The carrier-suppression...
Briefs: Photonics/Optics
A control scheme for nulling interferometry has been devised to make it possible to stabilize interferometric optical-path-length differences to within approximately a nanometer. This...
Briefs: Electronics & Computers
An experimental traveling-wave photomixing device generates narrow-band electromagnetic radiation at frequencies up to a few terahertz. The device is, potentially, a prototype of...
Briefs: Photonics/Optics
The figure schematically depicts the use of a special-purpose holographic plate to focus light from (1) circular interference fringes generated by a Fabry-Perot etalon to (2) a series of points, each...
Briefs: Photonics/Optics
A prototype laser ignition system has been developed for use in a hydrogen/oxygen-burning spacecraft thruster. The system could readily be adapted to terrestrial applications in which...
Briefs: Photonics/Optics
Mirror Structures Made of Pyrolytic Graphite
Experiments have demonstrated the feasibility of making mirror structures that comprise a thin face plate of chemical-vapor-deposited (CVD) pyrolytic graphite (PG) integrated with a thicker backing plate of CVD PG open-cell foam. The backing plate serves as a stiff structural support for the face plate,...
Briefs: Photonics/Optics
An optoelectronic system provides information on the relative position and orientation of two structures that are required to be brought together slowly and gently in a prescribed alignment. In...
Briefs: Photonics/Optics
A method of designing a compact pushbroom imaging spectrometer includes explicit consideration and minimization of nonuniformity of spatial and spectral response. It appears that prior...
Briefs: Photonics/Optics
A high-power laser beam can be used to apply a torque to a sample of material that is electromagnetically and/or electrostatically levitated in a vacuum. The torque can be used to alter...
Briefs: Photonics/Optics
A method of tailoring the cores of optical fibers to obtain optical properties needed for specific photonic applications exploits the sol-gel process. The method is expected to open new...
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