Abstract

There are a surprising number of discrete, well-corrected null lens designs with just two elements for testing a large, fast-speed parabolic mirror from its center of curvature. Some design techniques are discussed for generating these solutions, which may be applicable to the design of null lenses for other mirror shapes. Without examining these multiple solutions, which differ greatly in performance, there is no way to know if the optimum configuration has been found.

© 1992 Optical Society of America

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References

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  1. A. Offner, in Optical Shop Testing, D. Malacara, ed. (Wiley, New York, 1978), Chap. 14, pp. 439–457.
  2. J. M. Sasian, “Design of null correctors for testing of astronomical optics,” Opt. Eng. 27, 1051–1056 (1988).

1988

J. M. Sasian, “Design of null correctors for testing of astronomical optics,” Opt. Eng. 27, 1051–1056 (1988).

Offner, A.

A. Offner, in Optical Shop Testing, D. Malacara, ed. (Wiley, New York, 1978), Chap. 14, pp. 439–457.

Sasian, J. M.

J. M. Sasian, “Design of null correctors for testing of astronomical optics,” Opt. Eng. 27, 1051–1056 (1988).

Opt. Eng.

J. M. Sasian, “Design of null correctors for testing of astronomical optics,” Opt. Eng. 27, 1051–1056 (1988).

Other

A. Offner, in Optical Shop Testing, D. Malacara, ed. (Wiley, New York, 1978), Chap. 14, pp. 439–457.

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Figures (11)

Fig. 1
Fig. 1

Conventional Offner null lens with third- and fifth-order correction.

Fig. 2
Fig. 2

Additional seventh-order correction with the field lens moved away from the focus region.

Fig. 3
Fig. 3

Third-, fifth-, seventh-, and ninth-order corrections. There is strong bending of the field lens.

Fig. 4
Fig. 4

Alternative bending solution for the front lens.

Fig. 5
Fig. 5

Alternative bending solution for the field lens.

Fig. 6
Fig. 6

Alternative bendings for both the field lens and the front lens.

Fig. 7
Fig. 7

Nearly afocal meniscus lens approach.

Fig. 8
Fig. 8

Meniscus lens with alternative focusing lens bending.

Fig. 9
Fig. 9

Alternative meniscus lens bending solution.

Fig. 10
Fig. 10

The two alternative bendings with no ninth-order solution.

Fig. 11
Fig. 11

Wave-front optimized result for the 1.0-m f/l.0 parabolic mirror.

Tables (1)

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Table I Design Data

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