zone plate


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zone plate

[′zōn ‚plāt]
(optics)
A plate with alternate transparent and opaque rings, designed to block off every other Fresnel half-period zone; light from a point source passing through the plate produces an intense point image much like that produced by a lens.
References in periodicals archive ?
The preliminary location of the earthquake indicates this is an intraplate event, 50 or more kilometers to the east of the subduction zone plate boundary between the Philippine Sea and Sunda plates.
An internal library of static standard test patterns is included, as well as dynamic patterns including a real time zone plate generator EBU AV Sync audio synchronization pattern and a LCD panel persistence test.
Interestingly, the volcanics are located within a few hundred kilometres of, but are laterally offset from, the Calabrian subduction zone plate boundary, where the African plate sinks below the Eurasian plate," said Schellart.
The Pinhole/Zone plate: an optic cup with an f/177 aperture hole to allow for classic pinhole photography and an f/19 Zone plate opening.
From a beginner's introduction to pinhole cameras to expanded information and zone plate practices for more advanced users, this is packed with color photos of the latest, most original pinhole results.
Both the Phabrix-Sx handheld and Phabrix-Rx 2U rack mounted systems incorporate a wide range of advanced functions, including: SDI test signal generation and TX; zone plate generation, video RX analysis and capture; video scaling for all 3G/HD/SD SDI video formats on a 4.
There is new material in this book on RFCMOS, Freznel zone plate antennas, and RFICs.
003 keV) was focused to a spot ~1 [micro]m in diameter using a gold zone plate of 150 p.
An algorithm is presented for assembling tiles into a variable spaced grating, the one-dimensional analog of a Fresnel zone plate.
The Lensbaby Optic Swap System will include four interchangeable optic options: Double Glass (multi-coated doublet, 50mm), Single Glass (uncoated, 50mm), Plastic (50mm) and Pinhole/Zone plate (f/177 aperture hole for pinhole photography and f/19 Zone plate opening).
Focus X-rays in this system must be carried out using diffractive optical X called Fresnel Zone Plate.
5 eV were focused by a 160 [micro]m diameter Ni zone plate [12] with outermost zone width of 45 nm.