See Also: Abbe theory of image formation(medicine)
Abbe(dictionary)
Ernst Abbe(medicine)
condenser, Abbe(medicine)
Abbe limit(medicine)
Abbe operation(medicine)
Abbe flap(medicine)
Abbe apertometre(medicine)
Abbe, Robert(medicine)
Abbe, Ernst(medicine)

vulpic (iou) and Abbe theory of image formation (medicine)


vulpic (iou)



vulpic adjective. L19.
[from mod. Latin vulpina specific epithet of the lichen Cetraria vulpina, from Latin vulpinus: see VULPINE, -IC.]
Chemistry. vulpic acid, an acid, C19H14O5, occurring in many lichens and also obtained artificially.
Also vul'pinic adjective E20.

Abbe theory of image formation (medicine)


Abbe theory of image formation
<optics, physics> Abbe's theory is based on the fact that a non-self-luminous particle, which is illuminated by an extraneous source, gives rise to diffracted light rays, in addition to the dioptric pencil.

He stated that to form a good microscopical image as many of the diffracted rays as possible should be intercepted by the objective. With closely ruled lines, his theory is easily demonstrated by observing the back lens of the objective, for here the diffracted rays can be observed directly if the aperture diaphragm is closed. It can be shown that, when the illumination is arranged to exclude the diffracted images, resolution is lost.