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Radar beacon (short: racon) is – according to article 1.103 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) [1] – defined as "A transmitter-receiver associated with a fixed navigational mark which, when triggered by a radar, automatically returns a distinctive signal which can appear on the display of the ...
A 1951 USAF resolution test chart is a microscopic optical resolution test device originally defined by the U.S. Air Force MIL-STD-150A standard of 1951. The design provides numerous small target shapes exhibiting a stepped assortment of precise spatial frequency specimens. It is widely used in optical engineering laboratory work to analyze and ...
In smaller print below the X-ray claims, advertisements and packaging state that X-Ray Specs operate by "illusion". Part of the novelty value lies in provoking the object of the wearer's attentions. These subjects may believe that the device does allow the wearer to compromise their modesty, so are liable to respond with a variety of amusing ...
Rakon Limited is a technology company founded in 1967 that designs and manufactures frequency control products, primarily quartz crystals and temperature-compensated crystal oscillators ( TCXO ), [1] oven controlled crystal oscillators ( OCXO) and voltage controlled crystal oscillators ( VCXO ). [2] Its head office is in Auckland, New Zealand ...
X-ray detector. Acquisition of projectional radiography, with an X-ray generator and an imaging detector. X-ray detectors are devices used to measure the flux, spatial distribution, spectrum, and/or other properties of X-rays . Detectors can be divided into two major categories: imaging detectors (such as photographic plates and X-ray film ...
Stereo camera. Sputnik stereo camera. The two lower lenses are used for the photograph, while the third lens is used for composition. A stereo camera is a type of camera with two or more lenses with a separate image sensor or film frame for each lens. This allows the camera to simulate human binocular vision, and therefore gives it the ability ...
Stereoscope. A stereoscope is a device for viewing a stereoscopic pair of separate images, depicting left-eye and right-eye views of the same scene, as a single three-dimensional image. A typical stereoscope provides each eye with a lens that makes the image seen through it appear larger and more distant and usually also shifts its apparent ...
New York, Duffield, 1915. Collier, Richard (1968). The river that God forgot; the story of the Amazon rubber boom. New York, Dutton. Slavery in Peru: Message from the President of the United States Transmitting Report of the Secretary of State, with Accompanying Papers, Concerning the Alleged Existence of Slavery in Peru. United States.