retroreflector

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retroreflector

[¦re·trō·ri′flek·tər]
(physics)
Any instrument used to cause reflected radiation to return along paths parallel to those of their corresponding incident rays; one type, the corner reflector, is an efficient radar target.
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References in periodicals archive ?
The geometry used to illustrate the differences between the two aforementioned fabrication techniques will be that of the proposed RTP retroreflectors.
Even more interestingly, most of the light that was reflected back to the source was in fact the byproduct of the pocket-like structures that became de facto retroreflectors in this case.
The pulses are reflected by the AP15RR retroreflector, placed on the moon surface during the Apollo 15 mission, and detected with a time resolution of 0.
From the bounce times, alone, it is not possible to extract the anisotropy velocity vector, as the actual distance to the retroreflector is not known.
Retroreflectors have an additional feature that is essential for their use in dynamic (moving) systems.
To test these concepts, measurements will need 10 times better precision than what's been achieved with the array of retroreflectors left at the Apollo landing sites.
The retroreflectors are made of three front surfaced mirrors forming a hollow corner cube.
The team uses reference points on the telescope structure called Spherically Mounted Retroreflectors to accomplish this feat.
Astronauts aboard Apollo 11, 14, and 15 left retroreflectors on the Moon for this purpose, as did two robotic Soviet Lunakhod rovers.
It has the same size and mass as its predecessor but carries fewer mirrors (845) to accommodate two microthruster nozzles and 31 optical retroreflectors that enable tracking by the International Satellite Laser Ranging Network.
Samples of lunar soils collected by Apollo astronauts showed the rays to consist of pulverized "rock flour" containing translucent microscopic glasslike spherules - soils fused in the intense heat of impacts - that act like retroreflectors in road signs.
5-meter telescopes using the retroreflectors left on the Moon by the Apollo astronauts.