Abstract

The theory and procedure are given for figuring corrector plates for Schmidt cameras and related systems following Bernhard Schmidt’s classic method. The figure is achieved while the plate is deformed with a partial vacuum on one side. The method easily yields zone-free plates. A modification is described here wherein the correct profile is obtained without precise knowledge of the Young’s modulus or Poisson ratio of the particular glass disk in hand. The method is recommended for systems of f/2.5 or slower as there is danger of the plate breaking for faster systems.

© 1966 Optical Society of America

Full Article  |  PDF Article

Corrections

Edgar Everhart, "Errata: Making Corrector Plates by Schmidt’s Vacuum Method," Appl. Opt. 5, 1360-1360 (1966)
https://www.osapublishing.org/ao/abstract.cfm?uri=ao-5-9-1360

References

  • View by:
  • |
  • |
  • |

  1. W. Baade, in Amateur Telescope Making—Book Three, A. G. Ingalls, Ed. (Scientific American, Inc., N. Y., 1953), p. 369.
  2. J. W. Geckeler, Handbuch der Physik (Julius Springer-Verlag, Berlin, 1928), Vol. 6, p. 214, Eq. (5).
  3. E. H. Linfoot, Recent Advances in Optics (Oxford University Press, London, 1955), Chaps. III and IV.
  4. F. B. Wright, Publ. Astron. Soc. Pacific 47, 300 (1935).
    [CrossRef]
  5. E. W. Washburn, Ed. International Critical Tables (McGraw-Hill Book Company, Inc., New York, 1927), Vol. 2, p. 93and International Critical Tables Vol. 4, p. 21.

1935 (1)

F. B. Wright, Publ. Astron. Soc. Pacific 47, 300 (1935).
[CrossRef]

Baade, W.

W. Baade, in Amateur Telescope Making—Book Three, A. G. Ingalls, Ed. (Scientific American, Inc., N. Y., 1953), p. 369.

Geckeler, J. W.

J. W. Geckeler, Handbuch der Physik (Julius Springer-Verlag, Berlin, 1928), Vol. 6, p. 214, Eq. (5).

Linfoot, E. H.

E. H. Linfoot, Recent Advances in Optics (Oxford University Press, London, 1955), Chaps. III and IV.

Wright, F. B.

F. B. Wright, Publ. Astron. Soc. Pacific 47, 300 (1935).
[CrossRef]

Publ. Astron. Soc. Pacific (1)

F. B. Wright, Publ. Astron. Soc. Pacific 47, 300 (1935).
[CrossRef]

Other (4)

E. W. Washburn, Ed. International Critical Tables (McGraw-Hill Book Company, Inc., New York, 1927), Vol. 2, p. 93and International Critical Tables Vol. 4, p. 21.

W. Baade, in Amateur Telescope Making—Book Three, A. G. Ingalls, Ed. (Scientific American, Inc., N. Y., 1953), p. 369.

J. W. Geckeler, Handbuch der Physik (Julius Springer-Verlag, Berlin, 1928), Vol. 6, p. 214, Eq. (5).

E. H. Linfoot, Recent Advances in Optics (Oxford University Press, London, 1955), Chaps. III and IV.

Cited By

OSA participates in CrossRef's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (2)

Fig. 1
Fig. 1

Apparatus for making Schmidt correctors using Schmidt’s partial-vacuum method.

Fig. 2
Fig. 2

Profile of corrector plate while deflected. The glass that is to be removed is shown by cross hatching.

Equations (13)

Equations on this page are rendered with MathJax. Learn more.

w = [ 3 p ( 1 - s ) / 16 E t 3 ] [ ( 6 + 2 s ) a 2 r 2 - ( 1 + s ) r 4 ] .
w s = r 2 / 2 R s ,
w - w s = [ ( 3 a 2 p ( 1 - s ) ( 3 + s ) / 8 E t 3 ) - ( 1 / 2 R s ) ] r 2 - [ 3 p ( 1 - s 2 ) / 16 E t 3 ] r 4 .
h = ( k A a 2 r 2 - k r 4 ) / [ 32 ( n - 1 ) F 3 ] - 1 .
p = k E t 3 / 6 [ F 3 ( n - 1 ) ( 1 - s 2 ) ] - 1 .
R s / F = ( 16 / k ) ( n - 1 ) ( F / a ) 2 ( 1 + s ) / [ ( 6 + 2 s - A - A s ) ] - 1 .
W s = ( k a / 32 ) ( a / F ) 3 ( 6 + 2 s - A - A s ) / [ ( n - 1 ) ( 1 + s ) ] - 1 .
W 0 = 3 a 4 p ( 1 - s ) ( 5 + s ) / [ 16 E t 3 ] - 1 .
W 0 = ( k a / 32 ) ( a / F ) 3 ( 5 + s ) / [ ( n - 1 ) ( 1 + s ) ] - 1 .
W s / W 0 = ( 6 + 2 s - A - A s ) / [ ( 5 + s ) ] - 1
T = ( 9 + 3 s ) p a 2 / [ 8 t 2 ] - 1 ,
T = ( 9 + 3 s ) k E ( t / F ) / [ 192 ( n - 1 ) ( 1 - s 2 ) ( F / 2 a ) 2 ] - 1 ,
T 5.3 × 10 8 / f 2 dyn / cm 2

Metrics