When this work was performed, the authors were with the Department of Physics, Center for Optics, Photonics and Lasers, Laval University, Quebec, QUE G1K7P4, Canada.
G. Moretto is now with the Steward Observatory, The University of Arizona, Tucson, Arizona 85721.
Gilberto Moretto and Ermanno F. Borra, "Corrector design with active vase mirrors that allows a fixed telescope to access a large region of the sky," Appl. Opt. 36, 2114-2122 (1997)
We investigate a family of two-mirror correctors to compensate for the aberrations of a parabolic mirror observing at a large angle from the zenith. We constrain our designs to optical elements that can be built with currently available technology. The secondary and the tertiary mirrors are warped by Zernike polynomials, which we know can be generated with active vase mirrors. The performances of these corrector designs are usable for imagery.
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Dimensions are given in millimeters.
THI, distance between subsequent surfaces measured along the optical axis of the lens.
YDE, surface decenter along the
Y direction of the lens.
ADE, tilt of the lens’
Y axis in the Y–Z
plane.
APE, value of the circular apertures that measures the illuminated portion of the surface.
Table 7
Values of Aspherical terms for the Second (S6 and S7) and the Third (S8 and S9) Lensesa
Sn
K
A
B
C
D
S6
0.00
+0.39 × 10-07
+0.88 × 10-12
-0.98 × 10-16
+0.41 × 10-20
S7
0.00
+0.46 × 10-07
+0.11 × 10-11
-0.14 × 10-15
+0.62 × 10-20
S8
61.20
0.00
0.00
0.00
0.00
S9
-2.93
-0.43 × 10-09
-0.21 × 10-11
+0.70 × 10-15
-0.71 × 10-20
K is the conic coefficient, and A, B, C, and D
are the fourth-, sixth-, eighth-, and tenth-order deformation coefficients, respectively.
Table 8
Parameters that Characterize the Correction at
7.50° from the Zenith: A Single Two-Mirror Corrector Corrects at
±0.15°
Dimensions are given in millimeters.
THI, distance between subsequent surfaces measured along the optical axis of the lens.
YDE, surface decenter along the
Y direction of the lens.
ADE, tilt of the lens’
Y axis in the Y–Z
plane.
APE, value of the circular apertures that measures the illuminated portion of the surface.
Table 7
Values of Aspherical terms for the Second (S6 and S7) and the Third (S8 and S9) Lensesa
Sn
K
A
B
C
D
S6
0.00
+0.39 × 10-07
+0.88 × 10-12
-0.98 × 10-16
+0.41 × 10-20
S7
0.00
+0.46 × 10-07
+0.11 × 10-11
-0.14 × 10-15
+0.62 × 10-20
S8
61.20
0.00
0.00
0.00
0.00
S9
-2.93
-0.43 × 10-09
-0.21 × 10-11
+0.70 × 10-15
-0.71 × 10-20
K is the conic coefficient, and A, B, C, and D
are the fourth-, sixth-, eighth-, and tenth-order deformation coefficients, respectively.
Table 8
Parameters that Characterize the Correction at
7.50° from the Zenith: A Single Two-Mirror Corrector Corrects at
±0.15°
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