NASA Scientific and Technical Aerospace Reports

proliferative response of corneal tissue to low fluence 1540 nm laser radiation.
DTIC
Cornea; Infrared Lasers; Pulse Rate; Tissues (Biology)
20040111680 Naval Research Lab., Monterey, CA
Preliminary Evaluation of the Impacts of Aerosol Particles on Laser Performance in the Coastal Marine Boundary
Layer
Reid, Jeffrey S.; Westphal, Douglas L.; Paulus, Richard M.; Tsay, Si-Chee; Eijk, Alexander Van; Jun. 21, 2004; 63 pp.; In
English; Original contains color illustrations
Contract(s)/Grant(s): N00014-02-WX-20261(AA)
Report No.(s): AD-A425811; NRL/MR/7534--04-8803; No Copyright; Avail: CASI; A04, Hardcopy
This report summarized work performed by the Naval Research Laboratory, SPAWAR Systems Center-San Diego, NASA
GSFC and TNO Netherlands on preliminary assessments of the impact of aerosol particles on High Energy Laser performance.
While there is only fair visibility in many sensitive parts of the globe, including the Persian Gulf/Arabian Sea, East Asia, and
some parts of the Mediterranean Sea, extremely poor visibility events are more rare and are unlikely to be catastrophic to a
HEL system. Along coastal regions, dust, pollution, and smoke can be present, which will impair performance over long path
lengths. Sea salt and haze can also be significant in regions with considerable stratus cloud cover (such as parts of East Asia
and the Arabian Sea). While wavelength optimization is straightforward with respect to water vapor, atmospheric dust, and
sea salt, the presence of urban pollution and smoke can complicate the analysis and an optimum wavelength becomes site
specific.
DTIC
Aerosols; Air Water Interactions; Atmospheric Boundary Layer; Coasts; High Power Lasers; Laser Outputs; Marine
Meteorology
20040120959 NASA Langley Research Center, Hampton, VA, USA
Schlieren With a Laser Diode Source
Burner, A. W.; Franke, J. M.; [1974]; 2 pp.; In English; No Copyright; Avail: CASI; A01, Hardcopy
The use of a laser diode as a light source in schlieren flow visualization is discussed. A laser diode schlieren photograph
and a white light schlieren photograph are presented for comparison.
Author
Flow Visualization; Light Sources; Semiconductor Lasers; Schlieren Photography
20040120971 NASA Langley Research Center, Hampton, VA, USA
Laser Velocimetry: The Elusive Third Component
Meyers, James F.; [1985]; 23 pp.; In English; Symposium on Laser Anemometry, ASME 1985 Winter Annual Meeting9th
International Invitational Symposium on the Unification of Finite Elements, Finite Differences and Calculus of Variations,
17-21 Nov. 1985, Miami, FL, USA; Original contains color illustrations; No Copyright; Avail: CASI; A03, Hardcopy
The historical development of techniques for measuring three velocity components using laser velocimetry is presented.
The techniques are described and their relative merits presented. Many of the approaches currently in use based on the fringe
laser velocimeter have yielded inaccurate measurements of turbulence intensity in the on-axis component. A possible
explanation for these inaccuracies is presented along with simulation results.
Author
Laser Doppler Velocimeters; Systems Engineering; Flow Distribution; Laser Beams
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MECHANICAL ENGINEERING
Includes mechanical devices and equipment; machine elements and processes. For cases where the application of a device or the host
vehicle is emphasized see also the specific category where the application or vehicle is treated. For robotics see 63 Cybernetics,
Artificial Intelligence, and Robotics; and 54 Man/System Technology and Life Support.
20040111120 Sandia National Labs., Albuquerque, NM
Development of Detection Techniques and Diagnostics for Airborne Carbon Nanoparticles
Michelsen, H. A.; Witze, P. O.; Settersten, T. B.; Nov. 2003; In English
Report No.(s): DE2004-820205; SAND2003-8666; No Copyright; Avail: National Technical Information Service (NTIS)
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