Definition of Petzval in English:

Petzval

noun ˈpɛtsvɑːlˈpɛtsv(ə)l

Optics Photography

Used attributive with reference to various concepts related to a lens system designed by Petzval; specifically "Petzval condition"noun the condition for freedom from astigmatism of a compound lens, that the sum of the ratios of the power of each element to its refractive index be zero. "Petzval lens"noun a lens consisting of two widely spaced colour-corrected compound lenses whose negative elements are on the inner sides. "Petzval sum"noun a number representing the degree of curvature of the field of a compound lens, derived from the refractive indices and surface radii of its elements.

Origin

Late 19th century; earliest use found in William de Wiveleslie Abney (1843–1920), civil servant and photographic scientist. From the name of József M. Petzval, Hungarian mathematician.

Definition of Petzval in US English:

Petzval

noun

Optics Photography

Used attributive with reference to various concepts related to a lens system designed by Petzval; specifically "Petzval condition"noun the condition for freedom from astigmatism of a compound lens, that the sum of the ratios of the power of each element to its refractive index be zero. "Petzval lens"noun a lens consisting of two widely spaced colour-corrected compound lenses whose negative elements are on the inner sides. "Petzval sum"noun a number representing the degree of curvature of the field of a compound lens, derived from the refractive indices and surface radii of its elements.

Origin

Late 19th century; earliest use found in William de Wiveleslie Abney (1843–1920), civil servant and photographic scientist. From the name of József M. Petzval, Hungarian mathematician.

单词	Petzval
释义	Definition of Petzval in English: Petzval noun ˈpɛtsvɑːlˈpɛtsv(ə)l Optics Photography Used attributive with reference to various concepts related to a lens system designed by Petzval; specifically "Petzval condition"noun the condition for freedom from astigmatism of a compound lens, that the sum of the ratios of the power of each element to its refractive index be zero. "Petzval lens"noun a lens consisting of two widely spaced colour-corrected compound lenses whose negative elements are on the inner sides. "Petzval sum"noun a number representing the degree of curvature of the field of a compound lens, derived from the refractive indices and surface radii of its elements. Origin Late 19th century; earliest use found in William de Wiveleslie Abney (1843–1920), civil servant and photographic scientist. From the name of József M. Petzval, Hungarian mathematician. Definition of Petzval in US English: Petzval noun Optics Photography Used attributive with reference to various concepts related to a lens system designed by Petzval; specifically "Petzval condition"noun the condition for freedom from astigmatism of a compound lens, that the sum of the ratios of the power of each element to its refractive index be zero. "Petzval lens"noun a lens consisting of two widely spaced colour-corrected compound lenses whose negative elements are on the inner sides. "Petzval sum"noun a number representing the degree of curvature of the field of a compound lens, derived from the refractive indices and surface radii of its elements. Origin Late 19th century; earliest use found in William de Wiveleslie Abney (1843–1920), civil servant and photographic scientist. From the name of József M. Petzval, Hungarian mathematician.
随便看	kutenay Kuwait Kuwait City Kuwaiti Kuwaiti Kuwaitis kuya Kuzbass Kuznets Basin kuznetsk Kuznetsk Kuşadasi kV kv kvass kvasses kvell kvetch kvetch (about) kvetch about kvetcher kvetching kvetchy kvs kW