Optical System

Some articles on optical, optical system, system, optical systems:

Astigmatic - Forms of Astigmatism
... for objects (or parts of objects) away from the optical axis ... This form of aberration occurs even when the optical system is perfectly symmetrical ... however, as the amount of aberration can vary strongly with wavelength in an optical system ...
Ray (optics) - Special Rays - Optical Systems
... that is confined to the plane containing the system's optical axis and the object point from which the ray originated ... in a plane that contains both the object point and the optical axis ... Such rays do not cross the optical axis anywhere, and are not parallel to it ...
Lagrange Invariant
... In optics the Lagrange invariant is a measure of the light propagating through an optical system ... Ж2 is proportional to the throughput of the optical system (related to étendue) ... For a given optical system, the Lagrange invariant is a constant throughout all space, that is, it is invariant upon refraction and transfer ...
Astigmatic - Forms of Astigmatism - Third-order Astigmatism
... Planes that include the optical axis are meridional planes ... common to simplify problems in radially-symmetric optical systems by choosing object points in the vertical ("y") plane only ... plane, which contains the object point being considered and intersects the optical axis at the entrance pupil of the optical system ...
United States Space Surveillance Network - Ground-based Electro-Optical Deep Space Surveillance
... Ground-based Electro-Optical Deep Space Surveillance, or GEODSS, is an optical system that uses telescopes, low-light level TV cameras, and computers ... It replaced an older system of six 20 inch (half meter) Baker-Nunn cameras using photographic film ... A mobile telescope that contributes to the GEODSS system is located at Morón Air Base, Spain 37°10′12″N 5°36′32″W / 37.170°N 5.609°W / 37.170 -5.609 GEODSS ...

Famous quotes containing the words system and/or optical:

    Television is an excellent system when one has nothing to lose, as is the case with a nomadic and rootless country like the United States, but in Europe the affect of television is that of a bulldozer which reduces culture to the lowest possible denominator.
    Marc Fumaroli (b. 1932)

    It is said that a carpenter building a summer hotel here ... declared that one very clear day he picked out a ship coming into Portland Harbor and could distinctly see that its cargo was West Indian rum. A county historian avers that it was probably an optical delusion, the result of looking so often through a glass in common use in those days.
    —For the State of New Hampshire, U.S. public relief program (1935-1943)