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An achromatic doublet brings red and blue light to the same focus, and is the earliest example of an achromatic lens. In an achromatic lens, two wavelengths are brought into the same focus, here red and blue. An achromatic lens or achromat is a lens that is designed to limit the effects of chromatic and spherical aberration. Achromatic lenses ...
Compugraphic Corporation, commonly called cg, was an American producer of typesetting systems and phototypesetting equipment, based in Wilmington, Massachusetts, just a few miles from where it was founded.
New Wilmington is a borough in northern Lawrence County, Pennsylvania, United States, first platted in 1824 and established as a borough on April 9, 1863. The population was 2,097 at the 2020 census. [5] It is home to Westminster College and serves the Old Order Amish community in the surrounding Wilmington Township.
Philadelphia, the largest city in Pennsylvania and sixth-largest city in the nation, with a population of 1,603,797, and the center of the Philadelphia-Camden-Wilmington, PA-NJ-DE-MD metropolitan area, the state's largest metropolitan statistical area and nation's seventh-largest with a population of 6,245,051 Pittsburgh, the second-largest city in Pennsylvania, and the center of Greater ...
Dravo Corporation was an American shipbuilding company with shipyards in Pittsburgh and Wilmington, Delaware. It was founded by Frank and Ralph Dravo in Pittsburgh in 1891. [ 1 ] The corporation went public in 1936 and in 1998 it was bought out by Carmeuse for $192 million ($358.9 million today). [ 2 ]
Indian Run is a populated place in Wilmington Township of Mercer County, Pennsylvania, [1] [2] named for the stream Indian Run. [3] Indian Run had a reputation as a "safe haven" for African Americans, whether they were free or escaping slavery. Abolitionists who broke away from a New Wilmington church established
The base is the home of the 166th Airlift Wing (166 AW) of the Delaware Air National Guard.The wing is operationally-gained by the Air Mobility Command (AMC). Operating eight permanently assigned, Lockheed C-130 H2 Hercules transport aircraft, the wing provides the U.S. Air Force with tactical airlift and air and land drop of troops, cargo and passengers and aeromedical evacuation of patients ...
Achromatic means literally “without color”. It may refer to: Achromatic colors, “greys” or “neutral colors”, also black or white; Achromatic lens, a lens designed to minimize chromatic aberration; Achromatic vision: Monochromacy (total color blindness) Achromatopsia; Monochrome (disambiguation)