focal plane


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focal plane

n
1. (General Physics) the plane that is perpendicular to the axis of a lens or mirror and passes through the focal point
2. (General Physics) the plane in a telescope, camera, or other optical instrument in which a real image is in focus

fo′cal plane`



n.
a plane through a focal point and perpendicular to the axis of a lens, mirror, or other optical system.
[1890–95]

focal plane

The plane, perpendicular to the optical axis of the lens, in which images of points in the object field of the lens are focused.
Translations
References in periodicals archive ?
Caption: First Focal Plane reticles have recently become more popular, especially among long-range target shooters, because the distance between hashmarks stays the same compared to the target regardless of magnification.
If the greater field of view is key criteria for scope use and the target will likely be inside 500 yards, second focal plane reticles are definitely the way to go.
With Burris's Dual focal plane design the center illuminated section is in the rear focal plane.
The fundamental principle of the automatic focusing system based on image processing method is to count corresponding image focus evaluation function (FEF) value to each focal plane position, and the corresponding position of the maximum FEF value is the best imaging focal plane position [4].
The only drawback to this design is the distance to the focal plane requires a slightly larger diagonal mirror (2.
FT-IR microscopes equipped with a Focal Plane Array Detector are very rare.
They will then have to travel further before overlapping, so the overlap will occur beyond the focal plane.
The thrust forward will be to integrate the construction of a highly efficient thermoelectric device with that of an infrared focal plane array thus providing effective cooling directly to each individual pixel.
This compresses the focal plane array, causing specially designed electrical interconnects to delaminate from the rubber surface and form arcs, pinned on the ends by detector pixels.
The lens is designed to focus the visible and invisible infrared light rays onto a single focal plane.
Anatomy within the focal plane, a u-shaped zone between the x-ray source and the film, appears with the least amount of distortion.
The 160 X 120 pixels microbolometer focal plane array with a pitch of 35[micro] and a spectral response of 8[micro] to 14[micro], is adapted for low-cost thermal imagery and medium spatial resolution for military and civil applications.