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Target Optical was founded by the Cole National Corporation in 1995 [ 1] in Cleveland, Ohio. In 2004, the Cole National Corporation was acquired by the Italian Luxottica S.p.A. along with other Cole National Corporation holdings such as Pearle Vision. Luxottica folded Cole's operations into its North American Retail Group and the Cole structure ...
Luxottica is the largest optical retailer in the United States, with 7.3% of US retail sales in 2015. [47] With its merger with Essilor in 2018 the company owns Coastal/Clearly, an online contacts and glasses retail giant bought in 2014 that ships to over 200 countries beside its original North American market.
High-harmonic generation ( HHG) is a non-linear process during which a target (gas, plasma, solid or liquid sample) is illuminated by an intense laser pulse. Under such conditions, the sample will emit the high harmonics of the generation beam (above the fifth harmonic). Due to the coherent nature of the process, high-harmonics generation is a ...
Pearle Vision is an American chain of eye care stores. It is one of the largest franchised optical retailers in North America. The company was acquired by Luxottica (which has since merged with Essilor to form EssilorLuxottica ), [ 2] an Italian eyewear company, in 2004. As of December 31, 2018, Pearle Vision operated 110 corporate stores and ...
The line-spread function is directly proportional to the vertical integration of the point-spread image. The optical-transfer function (OTF) is defined as the Fourier transform of the point-spread function and is thus generally a two-dimensional complex function. Typically only a one-dimensional slice is shown (c), corresponding to the Fourier ...
Adaptive optics ( AO) is a technique of precisely deforming a mirror in order to compensate for light distortion. It is used in astronomical telescopes [ 1] and laser communication systems to remove the effects of atmospheric distortion, in microscopy, [ 2] optical fabrication [ 3] and in retinal imaging systems [ 4] to reduce optical aberrations.
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 ...
Course Setting Bomb Sight. The CSBS Mk. IX mounted in a Fairey Battle. The bomb aimer is sighting through the white ring-shaped backsights to the pin shaped foresights ( just visible against the armoured cable) and holding the bomb release switch in his right hand. The Course Setting Bomb Sight ( CSBS) is the canonical vector bombsight, the ...