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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 45, Iss. 21 — Jul. 20, 2006
  • pp: 5164–5167

Apochromatic telescope without anomalous dispersion glasses

Roman Duplov  »View Author Affiliations

Applied Optics, Vol. 45, Issue 21, pp. 5164-5167 (2006)

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In order to correct secondary longitudinal chromatic aberration in conventional refracting optical systems, it is necessary to use at least one optical material having anomalous partial dispersion. A novel lens system with correction of the secondary spectrum by using only normal glasses is presented. The lens system comprises three widely separated lens components; both second and third components are subaperture. The presented example of an apochromatic telescope demonstrates secondary spectrum correction with the use of only crown BK7 and flint F2, which are among the most inexpensive optical glasses available at the market. Two more similar designs are presented, both with the use of low-cost slightly anomalous dispersion glasses. These telescopes have a higher relative aperture and a smaller tertiary spectrum.

© 2006 Optical Society of America

OCIS Codes
(080.1010) Geometric optics : Aberrations (global)
(110.6770) Imaging systems : Telescopes
(160.2750) Materials : Glass and other amorphous materials
(220.3620) Optical design and fabrication : Lens system design

ToC Category:
Optical Design and Fabrication

Original Manuscript: January 3, 2006
Revised Manuscript: March 6, 2006
Manuscript Accepted: March 8, 2006

Roman Duplov, "Apochromatic telescope without anomalous dispersion glasses," Appl. Opt. 45, 5164-5167 (2006)

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  1. E. L. McCarthy, "Optical system with corrected secondary spectrum," U.S. patent 2,698,555 (4 January 1955).
  2. C. G. Wynne, "Secondary spectrum correction with normal glasses," Opt. Commun. 21, 419-424 (1977). [CrossRef]
  3. C. G. Wynne, "A comprehensive first-order theory of chromatic aberration secondary spectrum correction without special glasses," Opt. Acta 25, 627-636 (1978). [CrossRef]
  4. M. Rosete-Aguilar, "Correction of secondary spectrum using standard glasses," in Design and Engineering of Optical Systems,J. J. Braat , ed., Proc. SPIE 2774, 378-386 (1996).
  5. M. Rosete-Aguilar, "Application of the extended first-order chromatic theory to the correction of secondary spectrum," Rev. Mex. Fís. 43, 895-905 (1997).
  6. M. J. Kidger, Intermediate Optical Design (SPIE, 2004), pp. 109-112. [CrossRef]

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