A study of wide angle optical systems for use in visual simulations Final report, 29 Dec. 1964 - 29 Jun. 1965
Wide angle optical pickup systems for generating visual displays for manned space flight simulation
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Transient SEUs in a fiber optic system for space applications
The results of an investigation on the SEU sensitivity for a fiber optic operating system are reported. Measurements were made on the upset cross sections for the system in static and dynamic modes of operation. The heavy ion SEU test facility at Brookhaven and the proton facility at Harvard University were used in this study. Cross sections were obtained for Honeywell transmitter and reciever devices operating in a system at a frequency of 100 kHz. Both devices were independently irradiated. The results show that the dynamic mode was the worst case, and the receiver was the most sensitive part type in the system. The threshold linear energy transfer (LET) for the receiver was determined to be 1.6 MeV sq cm/mg for the three input signals used in the tests, which were: a continuous high state, a low state, and a 100 kHz square wave.
Label, Ken↗
Design of the Optical Communication Demonstrator Optical System
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optical wavelengths spectral beamsplitter steering↗
Optical system facilitates inspection of printed circuit boards
Optical comparator method determines the quality and registration of surface features of double-sided printed circuit boards. Color-coded superimposed images of both sides of a printed circuit board are presented to view, clearly showing details and registration of the circuitry.
Cridlin, M.↗
Guidance and control of MIR TDL radiation via flexible hollow metallic rectangular pipes and fibers for possible LHS and other optical system compaction and integration
Flexible hollow metallic rectangular pipes and infrared fibers are proposed as alternate media for collection, guidance and manipulation of mid-infrared tunable diode laser (TDL) radiation. Certain features of such media are found to be useful for control of TDL far field patterns, polarization and possibly intensity fluctuations. Such improvement in dimension compatibility may eventually lead to laser heterodyne spectroscopy (LHS) and optical communication system compaction and integration. Infrared optical fiber and the compound parabolic coupling of light into a hollow pipe waveguide are discussed as well as the design of the waveguide.
Yu, C.↗
Technology for Quiet Optical Systems in Space
The Micro-Precision Control/Structure Interaction program at JPL is chartered to develop the structures and control technology needed for sub-micron level stabilization of future optical space systems.
sub-micron↗
Two improved coherent optical feedback systems for optical information processing
Coherent optical feedback systems are Fabry-Perot interferometers modified to perform optical information processing. Two new systems based on plane parallel and confocal Fabry-Perot interferometers are introduced. The plane parallel system can be used for contrast control, intensity level selection, and image thresholding. The confocal system can be used for image restoration and solving partial differential equations. These devices are simpler and less expensive than previous systems. Experimental results are presented to demonstrate their potential for optical information processing.
Lee, S. H.↗
Electro-optical system for remote position measurements in real time
The development of an electro-optic position sensing system usable for Large Space Systems applications is described. A form of autocollimation was selected as the best overall technology, and a brassboard model was fabricated and tested.
Collyer, P. W.↗
Measurements of wind speeds with an optical crossbeam system
Optical crossbeam technique for remote sensing of wind speeds, relating light fluctuations to convective wind velocity by space-time correlation methods
Pickelner, D. J.↗
A final look at LDEF electro-optic systems components
Postrecovery characteristics of LDEF electro-optic components from the GTRI tray are compared with their prelaunch characteristics and with the characteristics of similar components from related experiments. Components considered here include lasers, light-emitting diodes, semiconducting radiation detectors and arrays, optical substrates, filters, and mirrors, and specialized coatings. Our understanding of the physical effects resulting from low earth orbit are described, and guidelines and recommendations for component and materials choices are presented.
Blue, M. D.↗
Integrated electro-optical systems for earth- oriented, environmental, and domestic applications
Integrated electro-optical microwave radar and laser /lidar/ systems for earth oriented, environmental and domestic applications
Hoge, F. E.↗
Retrodirective optical system
Fabry-Perot interferometer retrodirective reflector modulator for optical communication
Minott, P. O.↗
Telescope Wavefront Aberration Compensation with a Deformable Mirror in an Adaptive Optics System
With the goal of reducing the surface wavefront error of low-cost multi-meter-diameter mirrors from about 10 waves peak-to-valley (P-V), at lpm wavelength, to approximately 1-wave or less, we describe a method to compensate for slowly varying wavefront aberrations of telescope mirrors. A deformable mirror is utilized in an active optical compensation system. The kMS wavefront error of a 0.3m telescope improved to 0.05 waves (0.26 waves P-V) from the original value of 1.4 waves RMS (6.5 waves P-V), measured at 633nm, and the Strehl ratio improved to 89% from the original value of 0.08%.
active optics↗
Fiber-Optic System Would Detect Leaking Liquid H2
Proposed instrument based on optical time-domain reflectometry measures both locations and sizes of leaks in tanks and plumbing storing and transferring liquid hydrogen. Conceived for use in detecting leaks of hydrogen from propulsion system of Space Shuttle, concept applicable to detection of flammable and/or poisonous fumes in chemical-processing plants, fuel-distributing equipment, and other terrestrial applications.
Grove, Charles H.↗
Image Formation in High Contrast Optical Systems: The Role of Polarization
To find evidence of life in the Universe outside our solar system is one of the most compelling and visionary adventures of the 21st century. The technologies to create the telescopes and instruments that will enable this discovery are now within the grasp of mankind. Direct imaging of a very faint planet around a neighboring bright star requires high contrast or a hypercontrast optical imaging system capable of controlling unwanted radiation within the system to one part in ten to the 11th. This paper identifies several physical phenomena that affect image quality in high contrast imaging systems. Polarization induced at curved metallic surfaces and by anisotropy in the deposition process (Smith-Purcell effect) along with beam shifts introduced by the Goos-Hachen effect are discussed. A typical configuration is analyzed, and technical risk mitigation concepts are discussed.
polorization↗
Advanced Components For Fiber-Optical Systems
Paper reviews statuses of some advanced passive and active optical components for use with optical fibers. Emphasis on highly birefringent components controling polarization, because control of polarization critical in applications as fiber-optical gyroscopes, interferometric sensors, and coherent communications.
Depaula, Ramon↗
High-efficiency microwave-optical quantum transduction based on a long-coherence-time cavity electro-optic system
We propose a 3D quantum transduction architecture based on a long-coherence-time superconducting cavity coupled to an electro-optic resonator. The 3D hybrid system enables high-efficiency conversion between microwave and optical quantum signals, with potential applications in optical readout of qubits, high-fidelity entanglement generation and high-precision sensing.
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND ↗