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Retroreflectors are devices that operate by returning light back to the light source along the same light direction. The coefficient of luminous intensity, R I , is the measure of a reflector performance, which is defined as the ratio of the strength of the reflected light (luminous intensity) to the amount of light that falls on the reflector ...
Typically, the modulators fabricated at NRL have had contrast ratios between 1.75:1 to 4:1 for applied voltages between 10 V and 25 V, depending on the structure. [ 1 ] There are three important considerations in the manufacture and fabrication of a given device: inherent maximum modulation rate vs. aperture size; electrical power consumption ...
A corner reflector for radar testing. A corner reflector is a retroreflector consisting of three mutually perpendicular, intersecting flat reflective surfaces. It reflects waves incident from any direction directly towards the source, but translated.
The locations of lunar retroreflectors left by Apollo (A) and Luna (L) missions. Retroreflectors are devices which reflect light back to its source. Six were left at six sites on the Moon by three crews of the Apollo program, two by remote landers of the Lunokhod program, and one by the Chandrayaan program. [1]
Retroreflectors take advantage of a simple concept: three mirrors in the shape of a cube corner reflect light back in the direction it came from. The same can be achieved with a mirror in the ...
Last year was the planet’s hottest in recorded history, multiple government agencies announced Friday, marking two years in a row that global temperatures have shattered records.
The Laser Ranging Retroreflector (LRRR) is the first ever deployable lunar laser ranging experiment.It was carried on Apollo 11 as part of the Early Apollo Scientific Experiments Package, and on Apollo 14 and Apollo 15 as part of the Apollo Lunar Surface Experiments Package (ALSEP).
WASHINGTON (Reuters) -The U.S. Transportation Security Administration said its 65,000-member workforce is exempt from a Trump administration offer to quit jobs in exchange for pay and benefits ...