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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

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 previewThe micrographic dictionary; a guide to the examination of microscopic objects, by J.W. Griffith and A. Henfrey (1856)

by John William Griffith, Arthur Henfrey

ANGULAR APERTURE. the illumination of objects by oblique light under the microscope, the manner in which the rays are...

Google previewEssential 18037 Pages English Dictionary (2015)

by Nam Nguyen

Angular aperture, Angular distance. See Aperture ...

Google previewThe Encyclopaedia Britannica (1857)

Or Dictionary of Arts, Sciences, and General Literature

Micro- It is well known to every observer with the microscope looked at in the one case is not the thing looked at in the MicrolicOP"- that object-glasses of large angular aperture exhibit objects other, and is actually a smaller object. "Wewhich ...

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 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 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 previewCollier's New Encyclopedia (1921)

A Loose-leaf and Self-revising Reference Work ; with Illustrations and Ninety-six Maps

Angular aperture (in microscopes), the amount of light transmitted by the objective, and, consequently, the distinctness of the image afterward magnified by the lenses forming the eye piece. When an objective of the large angular aperture is ...

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