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Angular aperture

Angular aperture is a tautogram (all words start with the same letter). View more tautograms!


The angular aperture of a lens is the apparent angle of the lens aperture as seen from the focal point: where is the focal length is the diameter of the aperture.

  • also known as 孔徑角

Printed dictionaries and other books with definitions for Angular aperture

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Google previewElectronic Materials (1991)

From Silicon to Organics by L. S. Miller, J. B. Mullin

A similar analysis for type II phase matching shows that with comparable parameters the angular aperture is a factor of 2 greater. So far in our treatment of phase matching we have considered only the wave normal direction of the waves in the ...

Google previewConfocal Microscopy and Multiphoton Excitation Microscopy (2006)

The Genesis of Live Cell Imaging by Barry R. Masters

Summary • Abbe made two theoretical breakthroughs: first, the influence of angular aperture is a result of the diffraction of light caused by the specimens, and second, the so-called Abbe sine condition. • Abbe defined the numerical ...

Google previewUnderstanding Microbes (1989)

A Laboratory Textbook for Microbiology by G. William Claus, David Balkwill

Figure 3-2 shows that higher-magnification lenses are designed to accept larger cones of light (have larger angular apertures) and thus have a higher NA. The angular aperture is a fixed property of the lens system that is determined during ...

Google previewEncyclopedia of Optical Engineering: Pho-Z, pages 2049-3050 (2003)

by Ronald G. Driggers

For a given numerical aperture, the dry objective results in the best resolution, as then the angular aperture is greatest. For the same angular apertures, the oil- immersion objective gives the best resolution. Fig. 13 compares theoretical axial ...

Google previewEncyclopedia and Handbook of Materials, Parts and Finishes, Third Edition (2016)

by Mel Schwartz

See also angular aperture. Aperture Size The opening of a mesh ...

Google previewA Dictionary of Photography for the Amateur and Professional Photographer (1889)

Containing Concise and Explanatory Articles by Edward John Wall

Angular Aperture is the relation borne by the working diameter of a lens to its focal length. The wider the angular aperture the less the depth of focus and covering power of the lens. This is well seen in a portrait lens. Aperture of a Lens, ...

Google previewDictionary of Physics (2016)

by Palgrave Macmillan Ltd

The angular aperture is linked to the numerical D-aperture A and the Prefractive index n of the material in front of the imaging system by the relationship A = n sin u. angular correlation, the mutual dependence of the directions of several decay ...

Google previewDictionary of Colloid and Surface Science (1989)

by Paul Becher

is the angular aperture (the angle between the most divergent rays which can pass through the lens to form the image).

Google previewASM Materials Engineering Dictionary (1992)

by Joseph R. Davis, ASM International

angular aperture. In optical microscopy, the angle between the most divergent rays that can pass through a ...

Google previewHawley's Condensed Chemical Dictionary (2016)

by Robert A. Lewis

A device for measuring the angular aperture of an objective. It was invented by Abbé. aphicide. An insecticidal agent that kills aphids. aphid. (plant louse). Any homopterous insect, aphids are nearly cosmopolitan in distribution and many are ...

Google previewEncyclopedia of Materials Characterization (1992)

Surfaces, Interfaces, Thin Films by C. R. Brundle, Charles A. Evans, Shaun Wilson

where n is the refractive index of the medium between the cover glass and the objective front lens, and AA is the angular aperture of the objective. The maximum ...

Google previewEncyclopaedia Londinensis, Or, Universal Dictionary of Arts, Sciences, and Literature (1820)

These sectors, excepting the one seen by direct vision, and constituting the angular aperture of the plates, are a series of images of this aperture, formed by succesfive reflections between the inclined reflectors. The images formed by one ...

Google previewModern Dictionary of Electronics (1999)

by Rudolf F. Graf

angular aperture—The largest angular extent of wave surface that an objective can transmit. angular deviation ...

Google previewAcademic Press Dictionary of Science and Technology (1992)

by Christopher G. Morris, Academic Press

angular aperture Optics, the breadth of the angle between the most widely separated rays that can pass through a lens to form an image. angular bitstock Mechanical Engineering ...

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