aperture plane

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• Aperture masking interferometry — is a form of speckle interferometry, allowing diffraction limited imaging from ground based telescopes. This technique allows ground based telescopes to reach the maximum possible resolution, allowing ground based telescopes with large diameters… …   Wikipedia

• Aperture — For other uses, see Aperture (disambiguation). f stops demonstrated on a lens …   Wikipedia

• aperture — noun / ˈæp.ə.tʃə(r), ˈæp.ə.tjʊə(r),ˈæp.ɚ.tʃɚ/ a) An opening; an open space; a gap, cleft, or chasm; a passage perforated; a hole; as, an aperture in a wall. An aperture between the mountains. Gilpin. b) Something which restricts the diameter of… …   Wiktionary

• Aperture — F/A/V A variable opening inside a lens that regulates the amount of light reaching the image plane. Also known as an iris. (Camera/Lighting) PP A variable opening in a camera lens to control the amount of light that hits the film or image sensor …   Audio and video glossary

• aperture plate — noun : a smooth plate that establishes the film plane in a motion picture camera or projector and that has a rectangular opening defining the margins of the picture area as recorded or projected …   Useful english dictionary

• Focal-plane shutter — In camera design, a focal plane shutter is a type of photographic shutter that is positioned immediately in front of the focal plane of the camera, that is, right in front of the photographic film or image sensor. AdvantagesOne of the main… …   Wikipedia

• Numerical aperture — The numerical aperture with respect to a point P depends on the half angle θ of the maximum cone of light that can enter or exit the lens. In optics, the numerical aperture (NA) of an optical system is a dimensionless number that characterizes… …   Wikipedia

• Synthetic aperture radar — (SAR) is a form of radar in which the highly directional (and thus very large) rotating antenna used by conventional radar is replaced with many low directivity small stationary antenna positions scattered over some area near or around the target …   Wikipedia

• Tilted plane focus — Limits to focus in imaging Focus is relative to spatial depth. Selective focus in photography is usually associated with depth of focus. A pinhole generates an image of ‘infinite’ relative focus from a point just outside the opening out to… …   Wikipedia

• Coded aperture — Coded Apertures or Coded Aperture Masks are grids, gratings, or other patterns of materials opaque to various wavelengths of light. The wavelengths are usually high energy radiation such as X rays and gamma rays. By blocking and unblocking light… …   Wikipedia

• Interferometric synthetic aperture radar — Interferometric synthetic aperture radar, also abbreviated InSAR or IfSAR, is a radar technique used in geodesy and remote sensing. This geodetic method uses two or more synthetic aperture radar (SAR) images to generate maps of surface… …   Wikipedia