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Coddington magnifier

1

Terminological databases

Engineering, Manufacturing and Construction

Metroloogia terminibaas

ID 1200395 Last modified 11.11.2026
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Domain metrologymeasuring instruments
  • suurendusklaas, mis koosneb ühest väga paksust läätsest, mille keskel/ekvaatoril on sügav ringikujuline soon, mis toimib diafragmana, piirates valguskiired vaid telje lähedal liikuvatega ning vähendades seeläbi sfäärilist aberratsiooni/häiringut
  • 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
Coddingtoni suurendusklaas former
Usage examples
  • 1829. a tõi Henry Coddington Wollastoni-Brewsteri läätse laiema tähelepanu alla ja täiustas selle ehitust, muutes soone kuju. See võimaldas suuremat suurendust kui tavaline suurendusklaas. Puuduseks aga oli see, et diafragmasoon vähendas suurendusklaasi kaudu nähtavat vaatevälja.
Coddington magnifier former
Usage examples
  • In 1829, Henry Coddington brought the Wollaston-Brewster lens to wider attention and improved its design by altering the shape of the groove. This allowed for greater magnification than a standard magnifying glass. A drawback, however, was that the grooved diaphragm reduced the field of view visible through the magnifier.

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