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This diagram illustrates what are known as the aplanatic points of a sphere. A sphere of glass can bring light that is heading to a focus behind it to a focus at a point within it, with freedom from two aberrations, spherical aberration and coma.
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Spherical aberration - Wikipedia, the free encyclopedia
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Spherical aberration is an optical effect observed in an optical device (lens, mirror, etc.) that occurs due to the increased refraction of light rays when they strike a lens or a reflection of light...
en.wikipedia.org/wiki/Spherical_aberration
Hutchinson encyclopedia article about aplanatic lens. aplanatic lens. Information about aplanatic lens in the Hutchinson encyclopedia. ... The Aplanatic lens maintains a very small focused spot, providing for higher energies at the focal point than can be achieved with singlet lenses.
encyclopedia.farlex.com/aplanatic+lens encyclopedia.farlex.com/aplanatic+lens
Aplanatic meniscus lenses are used in conjunction with achromatic doublet lenses to form high quality, low-f/# imaging systems. Our standard meniscus lens selection is shown below. Run lens design wizard to design custom meniscus lens of other configurations.
www.optics-online.com/mnp.asp
From the theory of aplanatic points of a sphere it follows that there exist two points such that a spherical wave from first point is transformed into a spherical wave diverging apparently from second. ... Informations > Application Notes > 08. Aplanatic Points Of Ball Lenses...
www.doriclenses.com/lire/43.html
The Aplanatic Schmidt-Cassegrain is an advancement over the standard Schmidt-Cassegrain design featuring an aspherical secondary mirror to provide a substantial reduction in coma. ... The aplanatic Schmidt-Cassegrain features an aspherical secondary mirror. The primary benefit in this design is a substantial reduction in...
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a pair of aplanatic surfaces is that the eikonal of the system can be expressed as a homo- ... In order that these should be conjugate aplanatic surfaces, ...
www.iop.org/EJ/article/1475-4878/29/4/303/tov29i4p179.p... www.iop.org/EJ/article/1475-4878/29/4/303/tov29i4p179.pdf
Properties and optical aberrations of classical and aplanatic two-mirror telescopes: classical Cassegrain and Ritchey-Chretien, classical and aplanatic Gregorian telescope. ... ; 8.2.3. Aplanatic two-mirror telescopes...
www.telescope-optics.net/classical_and_aplanatic.htm www.telescope-optics.net/classical_and_aplanatic.htm
This system designed elsewhere using Melles Griot catalog lenses. Here, a small "light pipe" has been added in the image plane to simulate a fiber. The light pipe has a diameter of 0.005mm, and a length of 0.05mm, so it is similar ... To see the fiber, ... You can readily see that the extreme rays miss the edge of the fiber.
www.sinopt.com/software1/usrguide54/examples/lasrcomm.h... www.sinopt.com/software1/usrguide54/examples/lasrcomm.htm
aplanatic (comparative more aplanatic, superlative most aplanatic) ... Positive; aplanatic ... Comparative; more aplanatic...
en.wiktionary.org/wiki/aplanatic en.wiktionary.org/wiki/aplanatic