Celor lens

Celor
Introduced in1898
AuthorEmil von Hoegh
Construction4 elements in 4 groups
Aperturef/4.5 and 6.3

A Celor lens (also known as a symmetric dialyte)[1] is a highly corrected lens of the Dialyt type, designed for process photography, involving reproduction at or near 1:1 scale.

Design

It was developed in 1898 by Emil von Hoegh, as a development of his earlier Dagor lens (1892) designed for the German company Goerz.[1][2] It was originally named the Double Anastigmat Goerz [Dagor] Type B, sold in both f/4.5 and f/6.3 versions; in 1904, the faster f/4.5 version was renamed to the Celor and the f/6.3 version was renamed to the Syntor.[3]: 100 

Similar four-element air-spaced symmetric dialyte lenses were released by Steinheil (Unofocal, 1901), Kodak, and Taylor, Taylor & Hobson (Aviar, 1917).[3]: 100–101 

References

  1. ^ a b Geary, Joseph (2002). "Celor Lens". Introduction to lens design with practical ZEMAX examples. Richmond, Va: Willmann-Bell. ISBN 978-0-943396-75-0.
  2. ^ Born, Max (1999). Principles of optics: electromagnetic theory of propagation, interference and diffraction of light. Cambridge New York: Cambridge University Press. p. 265. ISBN 978-0-521-64222-4.
  3. ^ a b Kingslake, Rudolf (1989). "6: The First Anastigmats". A history of the photographic lens (1st, hardback ed.). San Diego: Academic Press. pp. 81–102. ISBN 0124086403.
Stub icon

This optics-related article is a stub. You can help Wikipedia by expanding it.