The cross-section through the optical axis shows the grooves that limit the aberration.
A Coddington magnifier is a magnifying glass consisting of a single very thick lens with a central deep groove diaphragm at the equator, thus limiting the rays to those close to the axis, which minimizes spherical aberration. This allows for greater magnification than a conventional magnifying glass, typically 10× up to 20×. Most single lens magnifiers are limited to 5× or so before significant distortion occurs. The drawback is that the diaphragm groove reduces the area seen through the magnifier.
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A Coddingtonmagnifier is a magnifying glass consisting of a single very thick lens with a central deep groove diaphragm at the equator, thus limiting...
jewels known as Stanhopes. A rival lens is the Coddingtonmagnifier. This was considered superior as a magnifier but was more expensive. John Henry Pepper...
in particular An Elementary Treatise on Optics. He also made the Coddingtonmagnifier popular. He was elected a Fellow of the Royal Society in February...
Edinburgh University) was named in his memory in 2015. Brewster's angle Coddingtonmagnifier Brewster crater Brewsterite Mary Bellis, The History of the Kaleidoscope...
a better image is required, other types of hand magnifier are typically used. A Coddingtonmagnifier provides higher magnification with improved image...
the earliest readers of microfilm was the CoddingtonMagnifier. Developed by Sir David Brewster, this magnifier was a "simple plano-convex lens of such...
Trans. 98: 96–102. doi:10.1098/rstl.1808.0006. S2CID 94866722. Coddingtonmagnifier Fraunhofer lines Pyrognomic History of electrochemistry List of presidents...
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