Comparing Emissivity Evaluation Methods for Infrared Sources

Heat transfer is governed by three distinct mechanisms: convection, conduction, and radiation. Unlike convection or conduction, heat transfer through radiation does not occur through a particular medium. To understand this phenomenon one must enter into the atomic or quantum realm. All atoms, at finite temperatures, are continuously in motion. Consequently, it may be understood that the mechanism of radiation is derived from the energetic vibrations and oscillations of these atomic particles, namely electrons.

Posted in: Articles, Features, Photonics, Heat transfer, Thermodynamics


Dr. Gerard Holzmann, Senior Research Scientist at the Laboratory for Reliable Software, NASA’s Jet Propulsion Laboratory

After a 23 year career at Bell Labs, Dr. Gerard Holzmann joined NASA’s Jet Propulsion Laboratory in 2003 to help create the Laboratory for Reliable Software (LaRS), which he currently manages. Dr. Holzmann is credited with inventing the SPIN model checker for distributed software systems and a Method and Apparatus for Testing Event Driven Software, as well as authoring The Power of 10: Rules for Developing Safety Critical Code, and the groundbreaking book Beyond Photography – The Digital Darkroom.

Posted in: Who's Who


Micro-Molded Spacers Protect Thermal Insulation of Cryogenic Propellants

Micro-Molded IMLI Matrix part Phillips Plastics Corp. Prescott, WI 877-508-0252 http://phillipsplastics.comTo achieve a high level of energy density as well as green environmental performance and safety, NASA prefers to use cryogenic propellants such as liquid oxygen, hydrogen, and methane to propel their spacecraft. However, these propellants are at very cold temperatures, as low as -423°F, and must be stored in thermally insulated tanks to keep the contents from boiling off. Next-generation NASA exploration missions will require spacecraft such as the Altair Lunar Lander to maintain cryogenic propellants for up to six months.

Posted in: Application Briefs, Green Design & Manufacturing, Propellants, Spacecraft fuel, Insulation, Plastics, Parts


Lenses Monitor Hubble Space Telescope Servicing in Orbit

C-mount Xenoplan and Cinegon lenses Schneider Optics Van Nuys, CA 818-766-3715 www.schneideroptics.comSchneider Optics’ C-mount Xenoplan and Cinegon lenses were selected by NASA to monitor aspects of the recent Hubble Space Telescope servicing mission. During the rendezvous between the shuttle Atlantis and the Hubble Space Telescope, and thereafter — while seven astronauts replaced six gyroscopes, batteries, and a sensor used to guide the telescope — the lenses were the “eyes” of the cameras that delivered high-resolution images to the shuttle and to engineers on Earth.

Posted in: Application Briefs, Optical Components, Optics, Optics, Maintenance, repair, and service operations, Inspections, Spacecraft


Disk Lasers in the Photovoltaic Industry

Diverse types of lasers, such as nanosecond, pulsed, and excimer, have been considered for various applications in the photovoltaic industry, including edge isolation, edge deletion, drilling for back contact, cutting of Si-wafer, and patterning of crystalline solar cells. High power lasers, with high stability and high efficiency in addition to high beam quality, are needed now more than ever.

Posted in: Application Briefs, Applications, ptb catchall, Photonics, Lasers, Electric power


NASA Research Will Help Aircraft Avoid Ocean Storms and Turbulence

NASA is funding the development of a prototype system to provide aircraft with updates about severe storms and turbulence as they fly across remote ocean regions. Scientists at the National Center for Atmospheric Research (NCAR) in Boulder, CO — in partnership with the University of Wisconsin — are developing a system that combines satellite data and computer weather models with artificial intelligence techniques.

Posted in: UpFront


Large Area OLED Device

Novaled (Dresden, Germany) developed a 15 x 15 cm white OLED with a thickness of less than 2 mm. The Novaled OLED stack allows for a natural and warm white light, performing with a high color rendering index (CRI) of 90 - which looks similar to sunlight or what is delivered by incandescent bulbs.

Posted in: GDM, Products, Products, Energy, Energy Efficiency, Lighting


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