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[1] [2] This side of the disc contains the actual data and is typically coated with a transparent material, usually lacquer. The reverse side of an optical disc usually has a printed label, sometimes made of paper but often printed or stamped onto the disc itself.
Current optical data storage media, such as the CD and DVD store data as a series of reflective marks on an internal surface of a disc. In order to increase storage capacity, it is possible for discs to hold two or even more of these data layers, but their number is severely limited since the addressing laser interacts with every layer that it passes through on the way to and from the ...
A standard DVD case is a single-piece plastic case with two creases, which folds around and snaps closed. It measures 135 mm × 190 mm × 14 mm (5.31 in × 7.48 in × 0.55 in). It is wrapped on the outside by a thin piece of transparent plastic that can hold a paper label. The label measures 284 mm × 184 mm (11.2 in × 7.2 in).
Optik: International Journal for Light and Electron Optics, or simply Optik (German for Optics) is a peer-reviewed scientific journal covering the optics of light and electrons. According to the Journal Citation Reports , the journal has a 2021 impact factor of 3.1.
Optical computing or photonic computing uses light waves produced by lasers or incoherent sources for data processing, data storage or data communication for computing.For decades, photons have shown promise to enable a higher bandwidth than the electrons used in conventional computers (see optical fibers).
Meyer Optik USA is headquartered in Atlanta, GA. That same year, net SE - Globell Deutschland launched a Kickstarter campaign to produce the Trioplan f2.9/50, a special new lens that revived the tradition of a versatile "soap-bubble" bokeh lens. Successive kickstarter lens campaigns collectively raised approximately $2.5 million. [1]
A replica of a Chappe telegraph tower (18th century). A 'semaphore telegraph', also called a 'semaphore line', 'optical telegraph', 'shutter telegraph chain', 'Chappe telegraph', or 'Napoleonic semaphore', is a system used for conveying information by means of visual signals, using towers with pivoting arms or shutters, also known as blades or paddles.
Their best attribute is that they lack the absorption band associated with the hydroxyl (OH) group (3,200–3,600 cm −1; i.e., 2,777–3,125 nm or 2.78–3.13 μm), which is present in nearly all oxide-based glasses. Such low losses were never realized in practice, and the fragility and high cost of fluoride fibers made them less than ideal ...