Abstract

We describe here an off-axis design for a 4.0-m astronomical telescope. We show that the geometric optical performance of this configuration can equal that of an on-axis conventional configuration while the diffractive performance fundamentally surpasses conventional telescopes because of the absence of pupil obstruction. The specific optical design described here uses a single off-axis primary mirror to obtain three distinct final focus ports: an f/10 port (with corrector) for wide-field imaging and spectroscopy with a field of view (FOV) of 15 arc min; a small-field, 2-reflection f/10 port suitable for polarimetry and coronagraphy; and a slower, f/16 (3-reflection) port with a 7 arc min FOV. For general astronomical observations requiring high optical throughput and low scattered light, this design is superior to conventional Ritchey–Chretien optical configurations.

© 1998 Optical Society of America

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  1. J. H. Burge, “Applications of computer generated holograms for interferometric measurement of large aspheric optics,” in International Conference on Optical Fabrication and Testing, T. Kasai, ed., Proc. SPIE2576, 258–269 (1995).
  2. G. Cecil, J. R. Kuhn, G. Moretto, J. Baldwin, H. Dottori, “SOAR scientific & technical requirements,” SOAR Project Internal Report (National Optical Astronomy Observatories, Tucson, Ariz., 1997).
  3. J. R. Kuhn, “SOAR-MSU astronomers report on scattered light,” MI-48823 (Michigan State University, East Lansing, Mich., 1997).
  4. G. Moretto, G. R. Lemaı̂tre, T. Bactivelane, M. Wang, M. Ferrari, S. Mazzanti, B. Di Biagio, E. F. Borra, “Zernike polynomials for correcting off-axis aberrations of fixed primary mirrors. 2. Optical testing and performance evaluation,” Astron. Astrophys. Suppl. Ser. 114, 379–386 (1995).
  5. G. Moretto, E. 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).
    [CrossRef] [PubMed]
  6. M. Wang, G. Moretto, E. F. Borra, G. R. Lemaı̂tre, “A simple active corrector for liquid mirror telescope at large zenith angles,” Astron. Astrophys. 284, 344–353 (1994).

1997

1995

G. Moretto, G. R. Lemaı̂tre, T. Bactivelane, M. Wang, M. Ferrari, S. Mazzanti, B. Di Biagio, E. F. Borra, “Zernike polynomials for correcting off-axis aberrations of fixed primary mirrors. 2. Optical testing and performance evaluation,” Astron. Astrophys. Suppl. Ser. 114, 379–386 (1995).

1994

M. Wang, G. Moretto, E. F. Borra, G. R. Lemaı̂tre, “A simple active corrector for liquid mirror telescope at large zenith angles,” Astron. Astrophys. 284, 344–353 (1994).

Bactivelane, T.

G. Moretto, G. R. Lemaı̂tre, T. Bactivelane, M. Wang, M. Ferrari, S. Mazzanti, B. Di Biagio, E. F. Borra, “Zernike polynomials for correcting off-axis aberrations of fixed primary mirrors. 2. Optical testing and performance evaluation,” Astron. Astrophys. Suppl. Ser. 114, 379–386 (1995).

Baldwin, J.

G. Cecil, J. R. Kuhn, G. Moretto, J. Baldwin, H. Dottori, “SOAR scientific & technical requirements,” SOAR Project Internal Report (National Optical Astronomy Observatories, Tucson, Ariz., 1997).

Borra, E. F.

G. Moretto, E. 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).
[CrossRef] [PubMed]

G. Moretto, G. R. Lemaı̂tre, T. Bactivelane, M. Wang, M. Ferrari, S. Mazzanti, B. Di Biagio, E. F. Borra, “Zernike polynomials for correcting off-axis aberrations of fixed primary mirrors. 2. Optical testing and performance evaluation,” Astron. Astrophys. Suppl. Ser. 114, 379–386 (1995).

M. Wang, G. Moretto, E. F. Borra, G. R. Lemaı̂tre, “A simple active corrector for liquid mirror telescope at large zenith angles,” Astron. Astrophys. 284, 344–353 (1994).

Burge, J. H.

J. H. Burge, “Applications of computer generated holograms for interferometric measurement of large aspheric optics,” in International Conference on Optical Fabrication and Testing, T. Kasai, ed., Proc. SPIE2576, 258–269 (1995).

Cecil, G.

G. Cecil, J. R. Kuhn, G. Moretto, J. Baldwin, H. Dottori, “SOAR scientific & technical requirements,” SOAR Project Internal Report (National Optical Astronomy Observatories, Tucson, Ariz., 1997).

Di Biagio, B.

G. Moretto, G. R. Lemaı̂tre, T. Bactivelane, M. Wang, M. Ferrari, S. Mazzanti, B. Di Biagio, E. F. Borra, “Zernike polynomials for correcting off-axis aberrations of fixed primary mirrors. 2. Optical testing and performance evaluation,” Astron. Astrophys. Suppl. Ser. 114, 379–386 (1995).

Dottori, H.

G. Cecil, J. R. Kuhn, G. Moretto, J. Baldwin, H. Dottori, “SOAR scientific & technical requirements,” SOAR Project Internal Report (National Optical Astronomy Observatories, Tucson, Ariz., 1997).

Ferrari, M.

G. Moretto, G. R. Lemaı̂tre, T. Bactivelane, M. Wang, M. Ferrari, S. Mazzanti, B. Di Biagio, E. F. Borra, “Zernike polynomials for correcting off-axis aberrations of fixed primary mirrors. 2. Optical testing and performance evaluation,” Astron. Astrophys. Suppl. Ser. 114, 379–386 (1995).

Kuhn, J. R.

G. Cecil, J. R. Kuhn, G. Moretto, J. Baldwin, H. Dottori, “SOAR scientific & technical requirements,” SOAR Project Internal Report (National Optical Astronomy Observatories, Tucson, Ariz., 1997).

J. R. Kuhn, “SOAR-MSU astronomers report on scattered light,” MI-48823 (Michigan State University, East Lansing, Mich., 1997).

Lemai^tre, G. R.

G. Moretto, G. R. Lemaı̂tre, T. Bactivelane, M. Wang, M. Ferrari, S. Mazzanti, B. Di Biagio, E. F. Borra, “Zernike polynomials for correcting off-axis aberrations of fixed primary mirrors. 2. Optical testing and performance evaluation,” Astron. Astrophys. Suppl. Ser. 114, 379–386 (1995).

M. Wang, G. Moretto, E. F. Borra, G. R. Lemaı̂tre, “A simple active corrector for liquid mirror telescope at large zenith angles,” Astron. Astrophys. 284, 344–353 (1994).

Mazzanti, S.

G. Moretto, G. R. Lemaı̂tre, T. Bactivelane, M. Wang, M. Ferrari, S. Mazzanti, B. Di Biagio, E. F. Borra, “Zernike polynomials for correcting off-axis aberrations of fixed primary mirrors. 2. Optical testing and performance evaluation,” Astron. Astrophys. Suppl. Ser. 114, 379–386 (1995).

Moretto, G.

G. Moretto, E. 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).
[CrossRef] [PubMed]

G. Moretto, G. R. Lemaı̂tre, T. Bactivelane, M. Wang, M. Ferrari, S. Mazzanti, B. Di Biagio, E. F. Borra, “Zernike polynomials for correcting off-axis aberrations of fixed primary mirrors. 2. Optical testing and performance evaluation,” Astron. Astrophys. Suppl. Ser. 114, 379–386 (1995).

M. Wang, G. Moretto, E. F. Borra, G. R. Lemaı̂tre, “A simple active corrector for liquid mirror telescope at large zenith angles,” Astron. Astrophys. 284, 344–353 (1994).

G. Cecil, J. R. Kuhn, G. Moretto, J. Baldwin, H. Dottori, “SOAR scientific & technical requirements,” SOAR Project Internal Report (National Optical Astronomy Observatories, Tucson, Ariz., 1997).

Wang, M.

G. Moretto, G. R. Lemaı̂tre, T. Bactivelane, M. Wang, M. Ferrari, S. Mazzanti, B. Di Biagio, E. F. Borra, “Zernike polynomials for correcting off-axis aberrations of fixed primary mirrors. 2. Optical testing and performance evaluation,” Astron. Astrophys. Suppl. Ser. 114, 379–386 (1995).

M. Wang, G. Moretto, E. F. Borra, G. R. Lemaı̂tre, “A simple active corrector for liquid mirror telescope at large zenith angles,” Astron. Astrophys. 284, 344–353 (1994).

Appl. Opt.

Astron. Astrophys.

M. Wang, G. Moretto, E. F. Borra, G. R. Lemaı̂tre, “A simple active corrector for liquid mirror telescope at large zenith angles,” Astron. Astrophys. 284, 344–353 (1994).

Astron. Astrophys. Suppl. Ser.

G. Moretto, G. R. Lemaı̂tre, T. Bactivelane, M. Wang, M. Ferrari, S. Mazzanti, B. Di Biagio, E. F. Borra, “Zernike polynomials for correcting off-axis aberrations of fixed primary mirrors. 2. Optical testing and performance evaluation,” Astron. Astrophys. Suppl. Ser. 114, 379–386 (1995).

Other

J. H. Burge, “Applications of computer generated holograms for interferometric measurement of large aspheric optics,” in International Conference on Optical Fabrication and Testing, T. Kasai, ed., Proc. SPIE2576, 258–269 (1995).

G. Cecil, J. R. Kuhn, G. Moretto, J. Baldwin, H. Dottori, “SOAR scientific & technical requirements,” SOAR Project Internal Report (National Optical Astronomy Observatories, Tucson, Ariz., 1997).

J. R. Kuhn, “SOAR-MSU astronomers report on scattered light,” MI-48823 (Michigan State University, East Lansing, Mich., 1997).

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